Green Belt - Exam Practice Questions
Which of the flow chart symbols below indicates a decision point? A) Rectangle B) Diamond C) Trapazoid D) Circle
Answer B
A company generates 22,700 Defects Per Million Opportunities. What is the Sigma level performance of the company? A) 4.0 B) 3.7 C) 1.2 D) 2.8 E) 3.5
Answer E
Which of the following statements represents an acceptable method for setting product/process specifications? A) Specifications should be set at the point(s) where customer satisfaction starts to decrease significantly below the target. B) Specifications should always be based on the capability of the process to deliver them. C) Specifications should be based on pre-established design guidelines that reflect customer requirements. D) A or B E) A or C
Answer E
Which of the following tools is most frequently used in brainstorming? A. Brain Scan Diagram B. Pugh Matrix C. Corrective Action Matrix D. Thought Process Map E. Affinity Diagram
Answer E
What is a "p" chart used for? A. Plotting the length of time it takes to process an invoice. B. Plotting fraction defective results from accounts payable transactions. C. Plotting defects per unit from vendor samples. D. Answers A, B, and C above. E. Answers A and C only
Answer B
What is the false rejection of the null hypothesis called? A) Level of significance B) Type I error C) Level of confidence D) Confidence interval E) Type II error
Answer B
A Lean Six Sigma team at an insurance company has been working on a project to reduce the number of claim defects leading to denied claims. A control chart of claim denials is out-of-control. What conclusion should the team draw from this condition? A) The number of denials has gone up. B) The number of denials has gone down. C) The process is unstable over time. D) The process is exhibiting less variability over time. E) The process is exhibiting more variability over time.
Answer C
Which of the following statements accurately reflects the Kano Model? A) Over time, Basic Quality characteristics tend to become Performance Quality characteristics. B) Basic Quality characteristics have a greater capacity to create satisfaction than Performance Quality characteristics. C) Basic Quality characteristics have a greater capacity to create satisfaction than Excitement Quality characteristics. D) Over time, Excitement Quality characteristics tend to become Basic Quality requirements
Answer D
Which three actions are correct to improve Visual Control? A) Re-arrange inventory by department, centralize racks, clean and organize workstations. B) Move racks to a warehouse, display performance charts, install surveillance cameras. C) Reduce inventory, display performance charts, install Andon boards to measure scrap. D) Clean and organize workstations, generate daily reports on control plan status, build higher racks. E) Reduce inventory, clean and organize workstations, display performance charts.
Answer E
Consider a team that is interested in improving the defect rate in a call center. To establish a baseline defect rate, the team only collects data from calls occurring between 9:00 am and 10:00 am on Wednesday morning. What type of data collection error may occur as a result of this sampling plan? A. Sampling error B. Operational error C. Perception error D. Interaction bias E. Measurement error
Answer A
What are the Mean, Median, and Mode for the data below? Answer choices are sequenced as follows: Mean, Median, and Mode. Data: 1, 2, 2, 3, 4, 7, 9 A. 4, 3, 2 B. 2, 3, 4 C. 2, 1, 0 D. 2, 2, 4 E. 3, 2, 4
Answer A
Which of the following can be correctly concluded from the following control charts? Please refer to the soft copy of this test to review the control charts. A. The process is not stable. B. The process is stable but out of control. C. Only common-cause variation is present. D. The process is not capable. E. Both A and C
Answer A Cannot copy chart, skipped this question and missed it. Because there was one point out which made it not stable.
If you reduce the probability (likelihood) of producing a defect (failure mode), what component of the RPN score will you affect? A. Severity B. Detection C. Availability D. Occurrence E. None of the above.
Answer D
5S is a system to reduce waste and optimize productivity through maintaining an orderly workplace and using visual cues to achieve more consistent operational results. Implementation of this method "cleans up" and organizes the workplace basically in its existing configuration, and it is typically the first lean method which organizations implement. Which of the following activities is NOT part of the 5S approach? A. Standardize and establish accountability for ongoing maintenance. B. Shorten the process lead time. C. Sustain the effort through consistent attention. D. Straighten to organize everything. E. Separate and remove unnecessary items.
Answer B
A processing center operates three shifts each day. In each eight hour shift, associates get one hour for breaks. If the center receives an average of 500 units of processing work each day, what is the Takt time? A. 2.97 minutes per unit B. 2.52 minutes per unit C. 4.78 minutes per unit D. 1.02 minutes per uni E. 9.30 minutes per unit
Answer B
Construct an XmR chart for the following data: 10.35, 10.86, 11.70, 9.33, 9.11, 10.74, 9.96, 11.06, 10.03, 10.61. Based on the chart, which of the following are true? A. The process appears unstable. B. The process appears stable. C. Many observations violate stability rule 1. D. The moving range chart has more observations than the X chart. E. A and D.
Answer B
Data collection may be undertaken in all steps of the DMAIC cycle. In which step is data typically collected in order to establish a current baseline for an existing process? A. Define B. Measure C. Analyze D. Improve E. Control
Answer B
On an SPC chart you see a point outside the upper control limit on the Range chart. Which of the following conclusions is appropriate? A. A unit is out of specification B. The process is exhibiting more variation than expected. C. The average of the process has shifted. D. The operator has made an adjustment. E. The subgroup has a higher average.
Answer B
Overproduction, scrap, waiting, and excess motion are forms of what? A. TPM B. Muda C. Kanban D. CFM E. Pareto
Answer B
The regression equation of a best fit trend line is Y = 5x + 2 and the R-squared is 0.95. If the independent variable is set at 8, what is the expected value of the dependent variable? 6 42 40 38 56
Answer B
What does "n" signify in a control chart? A. The number of subsets in collected data. B. The number of observations in a subset. C. The upper control limit for an X-bar chart. D. The centerline for an R-chart. E. The distance from the centerline to the control limits.
Answer B
What is the primary approach employed by Six Sigma to reduce the number of defects? A. Add inspection to isolate the customer from process instability. B. Reduce process variability at its sources through re-design or process controls. C. Revise customer specifications to accommodate excess process variability. D. Provide incentives to the workforce to eliminate defects. E. Promote teamwork to reduce waste
Answer B
What will a Stakeholder analysis matrix help the Six Sigma process improvement team do? A. Narrow the project scope. B. Reduce the likelihood of project roadblocks. C. Choose effective team members. D. Develop a focused problem statement. E. Choose the most optimal project to pursue.
Answer B
Which of the following is not a situation indicating "special cause" variation when analyzing a control chart? A. One point below the lower control limit. B. Two or more points fall on either side of the mean. C. Fifteen points in a row fall on either side of the mean within one standard deviation of the mean. D. Two out of three successive points fall beyond two standard deviations of mean, either above or below the mean. E. None of the above.
Answer B
Which of the following is not necessary when performing a Gage R & R for attribute data? A. A target % for the amount of repeatability and/or reproducibility agreement desired. B. A measurement system that provides measurements on a continuous scale. C. A standard to which appraisers can be evaluated. D. At least two appraisers. E. None of the above is necessary.
Answer B Skipped this question and missed it.
A continuous data sample is collected from a process over a short period of time. The DPMO is calculated to be 6200. What is the associated Sigma level for the process if, over the long term, it could shift by 1.5 Sigma? (Assume that the process data is Normally distributed). A. 6.0 B. 2.0 C. 4.0 D. 8.0 E. 1.0
Answer C
What should be included in the following Project Charter Business Case statement: "Process throughput time must be reduced in order to meet customer requirements?" A. Team leader. B. Scope of project, including "included" and "not included." C. Amount of improvement required and business impact. D. Measurement system to be used. E. Resources required.
Answer C
In which stage of a Six Sigma DMAIC project are hypothesis tests most frequently used? A. Define B. Measure C. Analyze D. Improve E. Control
Answer C
Internal metrics indicate that a DMAIC project team has successfully reduced the number of shipping errors which had been a significant source of customer dissatisfaction. The project manager held a meeting with the operations manager and controller to close the project by verifying that the requirements of the project were met and terminating the project budget. What element of closing a project is missing? A. Congratulating the team on a job well done. B. Reassigning unused resources to other projects. C. Confirming the results with the company's customer. D. Writing the final project report for management review. E. Nothing, all project closeout steps were followed.
Answer C
The acronym SIPOC stands for suppliers, inputs, process, outputs, and customers. What does the term "supplier" in a SIPOC map stand for? A. A Green Belt / Black Belt who maps the process. B. A Six Sigma Coach. C. An internal or external input source to the process. D. A person who is in charge of the process. E. None of the above.
Answer C
What do control charts allow one to assess? A. Process capability B. Cost of process improvement C. Process stability D. Customer complaints E. Customer specs
Answer C
Which of the following is NOT a characteristic of good leadership? A) Guiding Vision B) Passion C) Motivation by Fear D) Character E) Action-orientation
Answer C
What is the upper control limit on a p-chart if pbar (overall average value) is 0.60 and the sample size is 20? A. 0.65 B. 0.80 C. 0.93 D. 0.33 E. None of the above.
Answer C Skipped this question and then missed it.
A lean six sigma team is working to reduce the frequency of medical errors and wishes to track the number of errors per patient per day. The sample size of patients varies from day to day. Which type of attribute control chart should the team use? A. c-chart B. p-chart C. np chart D. u-chart E. Medical history chart
Answer D
How would a Six Sigma team best translate the following customer statement into a critical to quality (CTQ) measure? "It takes too long to get my breakfast delivered." A. Breakfast will be delivered in a timely manner. B. The team will improve the timeliness of breakfast delivery by 50%. C. Before determining the CTQ, the team needs to understand the capabilities of the breakfast delivery process. D. Breakfast will be delivered in a maximum of "y" minutes with "y" to be determined through VOC. E. Breakfast will be delivered more quickly than last year, on average.
Answer D
The time per issue resolution at a call center for 15 calls were recorded in ascending order as follows: 4, 7, 7, 9, 10, 11, 13, 15, 15, 15, 17, 17, 19, 19, 20 After calculating the mean, median, and mode, an error in the data is discovered - one of the 15's is really a 17. Which measure(s) of central tendency will change? A. Mean only B. Mode only C. Median only D. Mean and mode E. All three measures
Answer D
What is the biggest advantage of the 5-Why? A. Determine if the product is shippable. B. Assess process capability. C. Describe CTQC's more accurately. D. Find the root cause of a problem. E. Brainstorm possible solutions.
Answer D
What is the primary benefit of external set-up when compared to internal set-up? A. External set-up activities are performed by contractors or external vendors thus reducing costs. B. External set-up activities are useful because they do not require associates to perform the set-up activities. C. External set-up eliminates the need for measuring improvement in Lean Six Sigma projects. D. External set-up activities are performed while the process is running thus reducing the time needed during process change over. E. External set-up can be used in all industries while internal set-up can only be applied in health care settings
Answer D
What does the upper and lower control limit on a control chart represent? A. Customer requirements B. Business requirements C. "Voice of the customer" D. "Voice of the process" E. Acceptance criteria for process quality
Answer D Missed this question
When benchmarking the competition, which of the following is not a benefit? A. Identification of best practices. B. Quantifying gaps in performance. C. Communicating greater possibilities within your organization. D. Generating new ideas for improvement. E. Giving a sustainable competitive advantage.
Answer E
Assume that a Nationwide Green Belt performed a t-test to compare two processing methods for cycle time. The Green Belt wants to be at least 90% confident that there is a difference between the two methods before drawing a conclusion. Process A had a sample mean of 40 days and Process B had a sample mean of 35 days. The results of the t-test analysis returned a p-value of 0.15. What should be the conclusion? A. Process B is best because the average cycle time is 5 days less than Process A. B. Based on these samples, we are only 85% confident that there is a difference, thus we cannot conclude there is a statistical difference since the acceptance criteria was 90%. C. We should fail to reject the Null Hypothesis at a significance level of 0.10. D. Since we do not know the sample size, no conclusion can be drawn. E. b and c
Answer E Missed this question
A project team at a major rental car chain prepared an CTQC Tree to better understand the key drivers for meeting customer needs. Follow this link to review the CTQC Tree then answer the question. Which driver's CTQC's are poorly written and why? A) Pricing: it's harder to measure "layman's terms" and "clearly stated" B) Car Quality / Value: CTQCs don't address value C) Check-In / Return: 1 minute is unreasonable D) Web Site Easy to Use: cannot measure the ability to synchronize with a calendar E) Easy to Make Changes Mid-Contract: this is not really a driver
Answer A
According to Taguchi's Loss Function, the loss to society from poor quality increases as a function of what? A) Process variability. B) Process centering. C) Specification limits. D) Internal scrap rates.
Answer A
At what step in the Lean Six Sigma improvement process is a Process Map of the process first created? A) Define B) Measure C) Analyze D) Improve E) Control
Answer A
The probability of obtaining a test statistic value at least as extreme as the observed test statistic (computed from the sample) under the assumption that the null hypothesis is true, is called the: A) P-value B) Level of significance C) Type I error D) Level of confidence E) Type II error
Answer A
This question refers to the reaction plan from the SPC lesson practice exercise. What does the chart champion /data collector do after a corrective action has been implemented to remove a special cause? A) Collect seven additional subgroup samples to confirm effectiveness of the corrective action. B) Continue to monitor according to the sampling plan. C) Collect twenty subgroups of data and establish control limits. D) Revise sampling plan to collect more frequent samples.
Answer A
Three of the following are categories of Error-Proofing techniques. Which one is NOT? A) Elimination B) Shutdown C) Warnings D) Auto-correction
Answer A
What is a "parameter?" A. A numerical quantity that measures some aspect of a population. B. A sample value. C. A parameter is a guess. D. The solution to a statistical problem. E. None of the above.
Answer A
What is the purpose of a trend chart? A) Evaluate general performance over time. B) Show the correlation between inputs and outputs. C) Make point to point comparisons. D) Prioritize improvement projects. E) Identify the root cause of a problem.
Answer A
Which of the following is NOT a reason to map the value stream? A) To document who is responsible for specific corrective actions. B) Identify the inputs to a process. C) Identify sources of waste. D) Communicate the process in graphical fashion. E) To identify internal and external customers.
Answer A
Which of the following is a Supporting Service Requirement (vs. Primary Output Requirement)? A) Order-entry is efficient and customer-friendly. B) Delivery is provided quickly and with no issues. C) Product or service provided performs as specified. D) Quality concerns from customers are handled in a professional manner.
Answer A
Which test should be used to compare two means when the population variances are unknown but assumed equal? A) Pooled variances t-test B) Unequal variances t-test C) Paired samples t-test D) Pooled variances z-test
Answer A
Given the following pairs of values of X and Y, what is the first step in determining if there is a linear association between X and Y? X: 2, 4, 5, 6, 7 Y: 6, 8, 7, 3, 4 A. Draw a scatter diagram. B. Calculate sums of squares. C. Calculate correlation coefficient r. D. Do nothing, get more data. E. Calculate mean, median and mode.
Answer A Skip this question
A Lean Six Sigma project has a baseline performance of 16,800 DPMO. What is the Sigma level (after taking the 1.5 sigma shift into account)? A) 4.750 B) 3.625 C) 1.208 D) 3.0
Answer B
A book publisher is interested in learning more about reading habits, and is planning a survey drawn from a list of households who use libraries frequently to check out books. Which of the following statements best describes the sample? A) The sample will include all people who read a lot. B) The sample will include only one segment of frequent readers. C) The sample will include the households which read the most. D) The sample will represent all types of prospective readers.
Answer B
A restaurant is experiencing a high number of open tables and idle service staff, except during the peak periods over lunch and dinner, when the restaurant finds that there are not enough tables or staff to service waiting customers. After identifying the constraint in the system, what should the next step be? A) Identify the next constraint(s) B) Determine how to exploit the system's constraints C) Elevate the constraints so a higher performance level can be reached D) Subordinate everything else to the decision made to exploit the constraint(s) E) Run promotions to increase demand during non-peak times
Answer B
Consider a company that provides two services using the same basic process. Service A is relatively complex, and can be defective in 15 different ways. Service B is relatively simple, with only 5 possible defects. The company produces 500 units of A and 1000 units of B. A total of 27 defects are experienced. What is the DPMO (Defects Per Million Opportunities) for the overall process? A) 18,000 B) 2,160 C) 18 D) 216 E) 457
Answer B
SpeedyMortgage.com is an online mortgage company, which has struggled to keep up with rapid volume growth. A Lean Six Sigma team is working on a revised process flow, and wants to understand the current Takt time. Average daily demand is 300 mortgage applications, and there are 480 net minutes a day available for underwriting (one shift). What is the Takt time? A) 0.63 minutes B) 1.6 minutes C) 480 minutes D) 290 units E) 1.6 units
Answer B
Three employees at a garment factory were picked at random to participate in an MSA study. The standard to be evaluated was whether or not a particular garment was 'up-to-the-standard'. Review the 'Each appraiser vs. standard' graph shown in the link and answer the question below: Click here What is the correct interpretation of the graph? A) The percent agreement among the three appraisers is too low - less than 70%. Retraining is required. B) The three appraisers agree with the standard less than 65% of the time. The operational definition needs to be revised, or training for the appraisers improved. C) All three appraisers agree amongst themselves, showing a high level of consistency - there is no need to change anything. D) The confidence interval for Appraiser 2 is below those of the other two - only this appraiser needs to be retrained.
Answer B
What action could you take to help your team progress through the storming phase? A) Share all information regarding the team charter and scope of team authority. B) Use the S.M.A.R.T. process to guide objective/goal-setting. C) Consolidate the gains by encouraging real dialogue - an open exchange of ideas. D) Introduce team members and explain their strengths to the group.
Answer B
What is the objective that drives the establishment of Standard Work? A) The objective is to link all work of the enterprise to customer standards. B) The objective is to reduce variability (waste) by ensuring that everyone performing the work uses the same best methods. C) The objective is to ensure interoperability of all office equipment through conformance to international standards. D) The objective is to speed financial transactions by standardizing the financial terms used to communicate between business units. E) The objective is to establish a standard cost for all work so that the financial reports will accurately reflect the profitability of the enterprise.
Answer B
What is the primary approach employed by Lean Six Sigma to reduce the number of defects? A) Add inspection to isolate the customer from process instability. B) Reduce process variability at the source through redesign or process controls. C) Revise specifications to better reflect customer expectations. D) Provide incentives to the workforce to eliminate defects. E) Educate customers to manage product/process expectations.
Answer B
What is the primary purpose of a Histogram? A) Calculate the standard deviation. B) Display relative frequency by interval. C) Display number of intervals. D) Display process stability. E) Identify the root cause of variability.
Answer B
Which is the best description of the term "Operational Definition"? A) Defines processes required by operations. B) Provides a clear, unambiguous acceptance standard. C) Defines the operations process flow. D) Provides guidance on disposition of non-conforming parts. E) Provides standardized work instructions.
Answer B
Which of the following is NOT a direct benefit of Brainstorming? A) Encourage new and innovative solutions. B) Track who is supposed to do what, when. C) Encourage wider team participation. D) Improve dialogue between team members. E) Tap into the creativity of those who know the process.
Answer B
Which of the following is NOT a primary role or responsibility of a Black Belt? A) Provide team leadership in statistical analysis of data. B) Allocate funds and human resources to Lean Six Sigma projects. C) Track implementation actions to ensure timely completion. D) Coach team members in the proper application of problem-solving methods. E) Foster productive relationships within the team.
Answer B
Which of the following is NOT a reason to use continuous (variable) data? A) It provides a better measure of variation. B) It is more convenient for subjective appearance items. C) A greater number of statistical analysis tools can be applied. D) There is less subjectivity involved
Answer B
Which of the following is NOT an output of benchmarking the competition? A) Quantify any gap in performance. B) Quantify the current Sigma Level of your organization. C) Communicate greater possibilities within your organization. D) Identify Best Practices. E) Generate new ideas for improvement.
Answer B
Which of the following is the primary reason for a project team to consider closing out the project? A) Product or service has been launched B) Customer requirements have been met C) Budget has been expended D) Timeline calls for project close-out E) Project team has disbanded
Answer B
What would an appropriate significance level (alpha level) for a hypothesis test be on an issue where the severity of a type I error is high (like a critical customer centric IVR (Interactive Voice Response) system could crash)? A. 0.500 B. 0.001 C. 0.995 D. 0.999 E. 0.750
Answer B Skip this question
A Call Center process operates at a 6 Sigma level. Using the "Six-Sigma Conversion Table" provided by MoreSteam in the Toolbox section, what is the expected DPMO? Note: assume a 1.5 Sigma shift. A. 32 DPMO B. 1,350 DPMO C. 3.4 DPMO D. 500,000 DPMO E. 66,800 DPMO
Answer C
A Lean Six Sigma team is working on a project to accelerate the collection of accounts receivable. The team wants to identify and eliminate process steps that are redundant or wasteful so that the overall cycle time can be improved. What type of process map would be the best choice. A) SIPOC Map B) Flow Chart C) Value-added Flow Chart D) Deployment Flow Chart E) Value Stream Map
Answer C
A dataset of five scores has a median of 12. If the highest score is increased by 3, the new median: A) Will decrease B) Will increase C) Will stay the same D) Cannot be determined without additional information E) None of the above
Answer C
A sample of 5 persons with hypertension underwent a special treatment program which resulted in the following reductions in systolic blood pressure for these persons: -5, 10, 20, 5, 10. The mean reduction in systolic blood pressure is A) 10 B) 9 C) 8 D) 40 E) None of these
Answer C
A team is sorting through error data from a shipping process and wants to develop priorities for action. What tool should the team use to analyze the data? A) Process Mapping B) Brainstorming C) Pareto Chart D) Corrective Action Matrix E) Trend Chart
Answer C
An FMEA was constructed as part of a project to reduce invoicing errors. One of the potential failure modes was "Incorrect Price in Computer System". Values were assigned as follows: Severity - 8 Occurrence - 2 Detection - 9 What is the RPN for this failure mode, and which action would you recommend to improve the RPN based on this limited data? A) RPN=144, Error-proofing to decrease the probability of Occurrence and raise the Occurrence score B) RPN= 19, Error-proofing to increase the probability of Detection and reduce the Detection score C) RPN=144, Error-proofing to increase the probability of Detection and reduce the Detection score D) RPN= 19, Error-proofing to decrease the probability of Occurrence and raise the Occurrence score E) RPN=144, Error-proofing to increase the probability of Detection and raise the Detection score
Answer C
At what step in the Lean Six Sigma improvement process are efforts made to identify the root cause of process variability? A) Define B) Measure C) Analyze D) Improve E) Control
Answer C
During the team development process, at what step do team members reconcile their competing loyalties, agendas, and responsibilities? A) Forming B) Storming C) Norming D) Performing E) Warming
Answer C
National Fiduciary Guaranty Bank has been losing market share in home mortgage lending over the last several years. Surveys indicate very low customer satisfaction ratings for the home mortgage process. The bank recently chartered a Lean Six Sigma team to address the performance problem. The team has examined several process factors, including loan pricing, credit requirements, loan closing cycle-time and employee training as they relate to customer satisfaction and new loan volume. Which of the following are potential key process inputs in the bank's home mortgage business? A) Customer Satisfaction, Credit Requirements, Historical Loan Closing Cycle-Time B) Loan Pricing, Employee Training, Customer Satisfaction C) Loan Pricing, Credit Requirements, Employee Training D) Credit Requirements, New Loan Volume, Customer Satisfaction E) Historical Loan Closing Cycle-time, Customer Satisfaction, Employee Training
Answer C
The correlation coefficient is a measure of the interdependence of two variables. Which of the following statements is true? A. Correlation coefficient values are always positive. B. Correlation coefficients indicate how much error there is in the measurement system. C. Correlation coefficient values are always between +1 and -1. D. Both B and C E. Both A and B
Answer C
The manager at a retail store has built a C&E matrix of the reasons for shipping delays at the company. Review the matrix by clicking on the link below and answer the question that follows: Click here If H=5, M=3, L=1 and +++ = 5, ++ = 3, + = 1, what is the importance score for Order Processing if its correlation factor with 'Accurate items shipped' is (++), with 'Shipping address accurate' is (+) and with 'Billing amount accurate' is (+++)? A) 50 B) 39 C) 35 D) 27 E) 22
Answer C
Thought Process Maps are used to organize and document team activities. After answering the first question based on the first action taken, what is the most likely next step? A) Take another action. B) Generate another answer. C) Ask another question. D) Analyze another set of data. E) Replicate the experiment
Answer C
Two variables (A & B) have a correlation coefficient (r) of 0.74. Which of the following is a true statement? A) The coefficient of determination is 0.86. B) There is a strong causal relationship between the two variables. C) Variation in one variable accounts for 55% of the variation in the other. D) Variation in A causes variation in B with 74% confidence.
Answer C
What is the definition of a defect? A) A product/process that exhibits variability. B) A product/process that does not perform as well as the competition. C) A product/process that does not meet customer requirements for use. D) A product/process that is not reliable. E) A product/process that requires extra processing.
Answer C
What is the primary purpose of Five-Why analysis? A) Ask why five times to identify improvement actions. B) Ask why five times to ensure full input by team members. C) Ask why enough times to work back to the true root cause. D) Ask why enough times to identify all of the potential effects of variability. E) Ask why five times to identify the guilty person.
Answer C
What is the primary purpose of Lean Six Sigma? A) Develop clear quality standards that can be understood by everyone. B) Provide better training to the people involved in process improvement efforts. C) Improve profitability and/or other key performance metrics. D) Determine the number of opportunities for a defect to be produced. E) Provide a better structure for process improvement.
Answer C
What is the purpose of establishing the baseline performance level? A) Set the performance standard. B) Identify the highest priority defect. C) Provide a starting reference point to gage improvement. D) Motivate employees to achieve zero defects.
Answer C
Which is one of the most crucial actions in the process of achieving continuous flow? A) Creating a value stream map. B) Eliminating non valued-added steps. C) Reducing batch size toward one. D) Calculating Takt time. E) Changing the flow to a cellular design.
Answer C
Which of the following conditions indicate that a process step is a constraint in a sequential process flow where customer demand is not being met? A) Throughput for the process step is higher than any other process step B) The process step requires more operators than any other process step C) Cycle time for the process step is longer than any other process step D) The process step requires more setup time than any other process step E) Work-in-process for the process step is lower than any other process step
Answer C
Which of the following is NOT a benefit of the Corrective Action Matrix? A) Communicate who is responsible to implement actions. B) Communicate when actions are due to be implemented. C) Identify relationships between corrective actions. D) Track status relative to target implementation date. E) Communicate effectiveness of each action
Answer C
Which of the following is NOT a function of the Control Plan? A) Maintain a central record of significant characteristics and their chart location. B) Document who collects and charts data on significant characteristics. C) Control the process of identifying significant characteristics. D) Document the measurement instrument used to collect data on each significant characteristic.
Answer C
Which of the following is NOT part of an enterprise-wide value stream? A) Process inputs from suppliers. B) The channel of distribution. C) Cost comparisons by consumers. D) Processes that transform materials or information. E) New order processing
Answer C
Who determines what is or is not a Best Practice? A) Industry trade groups. B) International Association of Benchmarking. C) Individual organizations based on their knowledge and experience. D) American Society for Quality. E) American Production and Inventory Control Society
Answer C
Why is the Normal distribution appropriate when comparing two population proportion defectives (with sample sizes greater than 30 and p close to 0.5, for both populations)? A) The data are attribute (discrete). B) p1 and p2 are small. C) It provides a good approximation to the binomial distribution when np and n(1-p) are greater than 5 for each population. D) It is the easiest distribution to work with. E) All of the above.
Answer C
The steps in a five-step, sequential process have defective rates of 31%, 5%, 20%, 30%, and 10% respectively. What is the rolled throughput yield of the process? A. 52% B. 4% C. 33% D. 16% E. 32%
Answer C Skip this question had to back into percent to get answer look at excel practice spreadsheet
A 'population' is defined as: A) A number or measurement collected as a result of observation. B) A measurable characteristic of a population. C) A subset of a sample. D) The complete set of individuals, objects, or measurements about which we wish to draw a conclusion. E) none of the above
Answer D
A Lean Six Sigma Champion initiated a project to re-engineer the supply chain for a provider of cleaning services. The team leader communicated the project objective in clear terms. Since she was an avid NASCAR fan, conversation in team meetings seemed to always drift toward current events on the racing circuit. Many brainstorming sessions were conducted to examine how the supply chain could be improved if the whole company was reorganized. Team business was handled in a relaxed fashion that kept everybody happy. Sometimes, the team leader appeared to be disengaged. After six months, the project champion was growing increasing frustrated by the lack of progress. From this brief description, which primary leadership characteristics were missing in the team leader? A) Vision, Passion B) Passion, Communication C) Action-orientation, Character D) Passion, Action-orientation E) Character, Vision
Answer D
A Lean Six Sigma team wants to learn more about the CAUSES of defects in an insurance claim submission process. Which two tools would be most appropriate for this task? A) Trend Chart & Pareto Chart B) Fishbone Diagram & Errorproofing C) 5-Why Analysis & Histogram D) Fishbone Diagram & 5-Why Analysis E) FMEA & Errorproofing
Answer D
A Lean Six Sigma team working to reduce the amount of bad debts is tracking the dollar amount of receivables over 90 days past due. The team is using an Individuals and Moving Range control chart (XmR or ImR chart). The average balance outstanding (X-bar) is $736,500. The Mean Moving Range is $58,000. What is the upper control limit for the Individuals (X) chart? A) $926,160 B) $918,620 C) $910,500 D) $890,780 E) $818,620
Answer D
A company conducted a survey to study customer preferences regarding several attributes of its service offering, including Speed and Capacity. The margin of error for the difference of the two ratings was 6.0%. Which of the following results indicates a true difference? A) Speed = 32%, Capacity = 30%. B) Speed = 38%, Capacity = 34%. C) Speed = 31%, Capacity = 31%. D) Speed = 30%, Capacity = 20%.
Answer D
A pharmacy performed an FMEA on the prescription preparation process. One element of the process had an RPN much higher than the others. Which statement is true? A) The element with a high RPN indicates conformance with safety standards. B) The process element with a high RPN is the most reliable process. C) The high RPN number is a baseline for raising the RPN's of other elements. D) The element with a high RPN has higher risk, and should be a top priority for corrective action. E) All elements with an RPN have been proven to be reliable.
Answer D
A population has a mean of 50 and a variance of 0 (zero). What is the logical conclusion to be drawn from this information? A) It is an error. B) The population consists of 50 units. C) There are no units in the population. D) All units in the population have the same value of 50. E) None of the above.
Answer D
A process has an output of 410 defects in 5,462 units. Each unit goes through 7 steps, with one defect opportunity at each step. Using the "Sigma Level" calculator template provided by MoreSteam, what is the sigma level of the process? A. 3.1 B. 5.3 C. 2.7 D. 3.8 E. 4.9
Answer D
A researcher believes that Drug A is more effective (has a larger mean) than Drug B. What is an appropriate alternative hypothesis for any test he may conduct (note: µ = mean)? A) µ A > µ B B) µ A - µ B > 0 C) µ B < µ A D) All of the above E) None of the above
Answer D
An improvement team at an auto repair shop is working on an operational definition of the critical to quality characteristic 'fast service time for oil-change jobs'. From their analysis of the VOC data it was determined that this time should be not more than 20 minutes. Which of the following gives the most accurate operational definition for this characteristic? A) The time taken to drain out the oil in the engine and replace it with the new oil should not exceed 20 minutes. B) The total time from customer entry into the shop to customer exit from the shop should not exceed 20 minutes. C) Total time taken from when customer requests an oil change to when they drive out of the parking lot should be 20 minutes or less. D) The total time starting when the customer joins the wait line to the time the car keys are handed back after the oil change, should not exceed 20 minutes.
Answer D
Critical Path is determined by which of the following? A) Tasks that have the greatest impact on customer satisfaction. B) Tasks that are the riskiest. C) In-sequence tasks that are mandatory to meet safety standards. D) In-sequence tasks with the longest combined lead time.
Answer D
How would you categorize the cost of internal product/process testing? A) External failure cost B) Prevention cost C) Internal failure cost D) Appraisal cost E) Development cost
Answer D
Of these measurements, which one is best described as an Indicator/Predictor? A) Net profit margin. B) Customer satisfaction rating. C) Warranty returns. D) Scrap rate of a key input process.
Answer D
What is the purpose of the Overall Input Importance Ranking on a Cause and Effect matrix? A) Rate the interaction between one Cause and another B) Rate the Effects the team feels are most important C) Identify how important the CTQC's are to the customer D) Rank the Causes in terms of their potential overall impact on the CTQC's E) Identify the Effects with the most leverage on Causes
Answer D
What is the strongest guiding force of Lean Six Sigma decision-making? A) Experience of process owners. B) Historical best practices. C) Opinions of senior management. D) Data and statistical analysis. E) Benchmarking studies of the competition.
Answer D
When applying 5-S principles to improve workplace organization and efficiency, what is the first step? A) Set in Order (Straighten) B) Standardize C) Shine D) Sort E) Sustain
Answer D
When constructing a Value Stream Map, what does the following symbol represent? (Rectangle with bent corner) A) Manual Flow of Information B) Outside Source C) Performance Board D) Production Kanban E) Process Step
Answer D
Which of the following is not a goal of a Lean Enterprise? A. Eliminate waste B. Reduce lead time C. Reduce set up time D. Eliminate value added activities E. Improve TAKT time
Answer D
Which of the following is not a reason to pilot? A) Reduce risk B) Uncover unidentified issues C) Allow for verification prior to implementation D) Evaluate design alternatives E) Reduce disruptions
Answer D
Which of the following statements is FALSE? A) When comparing test scores across different locations, the standard deviation will tell you how diverse the test scores are for each location. B) A time-series plot is a graphical representation of the observations in a data set over time. C) The frequency of any particular value of a discrete variable is the number of times that value occurs in the data set. D) The sample median is highly sensitive to extreme values (outliers). E) When the data are categorical, a frequency distribution or relative frequency distribution provides an effective tabular summary of the data.
Answer D
Which of these measurements is taken from a continuous scale? A) The percentage of babies born during the year that are boys. B) The number of blades of grass in your yard. C) Ratings from a Zagat restaurant survey book. D) The air pressure of the left front tire of your vehicle. E) Percentage of election votes for a given candidate
Answer D
Which set-up is an example of paired data? A) Two volleyball teams participate in a study to determine if more practice is related to getting more serves in play. One team practices two hours a day and the other practices one hour. After two weeks, each player gets 20 serves. The mean number of serves for each team is calculated and the two numbers are compared. B) To find out if there is a difference between housing prices in two neighborhoods, a realtor randomly chooses 10 houses in each of two neighborhoods. She calculates the mean price of houses in each neighborhood and compares the two values. C) To test the effect of a diet pill, a researcher randomly selects 20 subjects of various weights. Subjects are split into 2 groups with the groups being very similar as to the weight of the subjects. The researcher gives all subjects in one group the diet pill and calculates their mean weight loss after 2 weeks. The subjects in the second group receive a placebo and the researcher calculates their mean weight loss after 2 weeks. The researcher then uses the appropriate technique to compare the diet pill with the placebo. D) A company has 2 sets of scales and believes they give different weight measurements. A Black Belt uses standard weights of 5, 10, 15, 20, 25, 30, 35, 40 , 45, and 50 pounds to get a read-out for each set of scales. She then calculates the difference in the read-outs for each weight and uses the appropriate technique to see if the scales differ from one another as suspected.
Answer D
Which type of sample involves some form of random selection so that every member of the population has a non-zero chance of being included in the sample? A) Judgment sample B) Volunteer sample C) Zero-bias sample D) Probability sample E) Convenience sample
Answer D
What type of attribute control chart is useful for plotting a count of the defects when the subgroup size is constant? A. x-Bar and R-chart B. np chart C. p-chart D. c-chart E. Pareto chart
Answer D Missed this question
A Lean Six Sigma team is working on a project in the order entry area to improve order accuracy and reduce the cycle time. The team wants to analyze the variability in cycle time. What tool should be used? A) Trend Chart B) Fishbone Diagram C) Benchmarking D) Metrics E) Histogram
Answer E
A financial services firm routinely processes a large volume of account change requests. A Lean Six Sigma team wants to understand the resources required to maintain a maximum target cycle time of 16 hours. When demand fluctuates, personnel can be reassigned temporarily to increase the rate of processing. If the normal processing rate is 2 per minute, what should the maximum items in process (queue) before reassigning resources? A) 16 B) 32 C) 120 D) 960 E) 1920
Answer E
A project team at a major rental car chain prepared an Affinity Diagram to better understand the customer needs regarding the rental car process. Follow this link to review the Affinity Diagram then answer the question. The team had two remaining ideas (unrelated to each other) that did not fit well into the any of the three headers they created (Check-In / Return, Pricing, Car Quality / Value). What should the team do with these two ideas? A) Place them under a new header called "Other" B) Place them under the best-fitting existing category C) Discard them as they are insignificant D) Continue brainstorming until the heading(s) becomes clear E) Place each under its own header
Answer E
A project team was performing a Project Risk Assessment in preparation for a Project Review Meeting. The team concurred on the assessment for all of the activities that had been scheduled to be started but disagreed on how to handle project activities that were not scheduled to start yet. The project manager resolved the disagreement by describing how these activities should be handled. What did the project manager say? A) The Completeness for these activities is set to 0% as the activities have not been scheduled to start. B) The Completeness for these activities is set to 100% as the activities have not been scheduled to start. C) The activities are not included in the calculation of the Risk Index. D) A or C E) B or C
Answer E
A telephone survey of 100 randomly selected people was conducted to find out whether or not they thought certain mortgage company practices were unfair. By design the sample did not include anyone who did not have a telephone. Which of the following factors is the source for this error? A) Perception B) Interaction Bias C) Measurement D) Operational E) Sampling
Answer E
The expression Y=f(X) is often used to describe the relationship between process inputs and the process output. Which description of Y=f(X) is most accurate? A) The output of a process (X) is a function of the process inputs (Y). B) More process inputs (X) improve the function of the process output (Y). C) Reducing the function of a process input (X) will increase process output (Y). D) More process inputs (Y) improve the function of the process output (X). E) The process output (Y) is a function of the process inputs (X)
Answer E
What is the purpose of a Scatter Plot Diagram, and in what phase of the DMAIC cycle is it most frequently used? A) Visually display the relationship between several variables, Define B) Quantify the relationship between two variables, Improve C) Evaluate the stability of a process, Measure D) Visually display the dispersion, or spread, of a process, Analyze E) Visually display the relationship between two variables, Analyze
Answer E
When Six Sigma and Lean Methods are used together, they complement each other. As a general rule, what are the primary areas of focus for both Six Sigma and Lean? A) Six Sigma - Reduce Complexity; Lean - Improve Quality B) Six Sigma - Improve Process Flow; Lean - Reduce Process Inputs C) Six Sigma - Control Process Cycle Time; Lean - Reduce Process Variability D) Six Sigma - Increase Process Output; Lean - Identify Key Inputs E) Six Sigma - Improve Quality; Lean - Reduce Process Cycle-time
Answer E
Which of the following is a primary use of Fishbone Cause and Effect Charts? A) Provide a project road map. B) Quantify relationships between input and output. C) Show process performance over time. D) Categorize process inputs by department. E) Identify potential root causes of variability.
Answer E
Which of the following is not part of the change leadership process? A) Communicate the vision/objective. B) Understand the balancing forces (obstacles) C) Generate and celebrate short term wins. D) Create a sense of urgency. E) Eliminate functional reporting structures.
Answer E
Which of the following statements is false? A. The null hypothesis is the hypothesis of "no difference." B. Severity, Occurrence, and Detection are the RPN categories for an FMEA. C. u-charts can be used for varying subgroup sizes. D. Specification limits are needed to assess process capability. E. "Out of control" points on a control chart always indicate bad business situations.
Answer E
Which tool is most commonly used to map the complete sequence of activities, including customers and suppliers, an organization performs in order to produce and deliver its end product or service? A) Spaghetti diagram B) Functional block diagram C) SIPOC process map D) Process flow chart E) Value stream map
Answer E
What is the characteristic of a distribution called that is the difference between the highest and lowest values of a sample data set? A) Mean B) Median C) Location D) Standard Deviation E) Spread
Answer E
Which of the following statements accurately reflects the Kano model? A. Over time, Basic Quality characteristics tend to become Performance Quality characteristics. B. Over time, Excitement Quality characteristics tend to become Basic Quality requirements. C. Basic Quality characteristics have a greater capacity to create satisfaction than Performance Quality characteristics. D. Basic Quality characteristics have a greater capacity to create satisfaction than Excitement Quality characteristics. E. The farther the measurement from the target, the greater the waste.
Answer B
The term "Y = f (x)" relates to process variables. Which statement is true? A. Y relates to input variables and x relates to process and output variables. B. x relates to process and input variables, and Y relates to output variables. C. Y relates to process variables and x relates to input and output variables. D. None of the above. E. All of these statements are false.
Answer B Missed this Question
Assume that customers expect a transaction to be completed in less than 7.5 minutes. If the process completion time is Normally distributed with a mean of 10 minutes and a standard deviation of 1 minute, what percentage of customers will be satisfied? (Hint: Draw a picture of the Normal distribution described in the question). A. Greater than 5.0% B. Less than 2.5% C. Greater than 7.5% D. No customers will be satisfied E. Cannot be determined
Answer B Missed this question
Consider the regression equation y = -5x + 10. What would be the shape of the points on a scatter plot? A. The points would form a straight line, parallel to the x axis. B. The points would slope up from left to right. C. The points would slope down from left to right. D. The points would form a straight line, parallel to the y axis. E. None of the above.
Answer C Skip this question -5 would mean slope down from left to right +5 would mean slope up from left to right
If you are trying to determine if an input variable may affect your key characteristic (output variable) by examining the correlation between variables, which tool should you use? A. X-bar and R chart B. p-chart C. Pareto chart D. Scatter plot diagram E. Affinity diagram
Answer D Skipped this question
Please review this simplified FMEA from a mortgage loan closing process. Which of these potential failure modes should be the highest priority for an improvement project? A. Wrong Form Used B. Missing Signature C. Missing Documents D. Closing Delayed E. Closing Cost Incorrect
Answer D This had a chart that I cannot copy
