BUS 503 Final Exam Prep
Which of the following is a correct pairing of sigma level to defects per million opportunities (DPMO)?
6(sigma) - 3.4DPMO 5(sigma) - 133DPMO 3(sigma) - 308DPMO All of the above CORRECT ANSWER: 6(sigma) - 3.4DPMO
A Student's t test can be used to determine whether or not differences exist in:
Arbitrage Averages Confidence intervals Correlation coefficients CORRECT ANSWER: Averages
Considerations for how much data to collect (measurements to make) include:
Impact of process Y on customer satisfaction Impact of each X on Y Cost to obtain measurement All of the above CORRECT ANSWER: All of the above
σ is a measure of _______ .
Importance Weight Dispersion Centrality CORRECT ANSWER: Dispersion
A must-be for the United States Postal Service is:
Courteous employees Stylish trucks Delivery of parcels without damage Well defined organizational hierarchy CORRECT ANSWER: Delivery of parcels without damage
Why is it important to document results completely and accurately?
Creates a historical record of why something was improved Allows for others to leverage from my activities To sustain the gain and maintain improved performance All of the Above CORRECT ANSWER: All of the above
The right hand side of a completed "house of quality" (HOQ) displays rankings and values for:
Customer needs or desires Competitive assessments or comparisons Design feature measurements and importance Design feature interactions None of the above CORRECT ANSWER: Competitive assessments or comparisons
What does the shape shown below indicate in a process map?
Decision
Which of the following is a tool to gather information from customers:
a. Vernier calipers b. Focus groups c. Surveys All of the above b and c CORRECT ANSWER: b and c
Legal requirements specify that a bottled product must contain no less than the volume printed on the label. A bottling company wants to reduce the amount of overfilled bottles. On the basis of the data below, what is the most effective strategy to accomplish this task?
Decrease the target fill volume only Decrease the target fill variation only First decrease the target fill volume, then decrease the target fill variation First decrease the target fill variation, then decrease the target fill volume CORRECT ANSWER: First decrease the target fill variation, then decrease the target fill volume.
An organized and disciplined approach to problem solving in most Lean Six Sigma (LSS) organizations is called DMAIC, which stands for?
Define Measure Analyze Improve Control Delay Methods Analyze Insist Complete Define Measure Analyze Implement Complete Delete Manage Analyze Improve Control CORRECT ANSWER: Define Measure Analyze Improve Control
The term "sigma" is used to:
Designate the distribution or spread about the mean of a process Define arbitrary standards to subordinates Provide a baseline process metrics Indicate waste in a process CORRECT ANSWER: Designate the distribution or spread about the mean of a process
A control chart is used to:
Determine if defective parts are being produced Measure process capability Determine causes of process variation Detect non-random variation in processes CORRECT ANSWER: Detect non-random variation in processes
A cause and effect diagram is a useful tool for doing which of the following?
Determining the flow of a process Detecting shifts in a process Developing theories based on symptoms Arranging theories by defect count CORRECT ANSWER: Developing theories based on symptoms
A disadvantage of the One Factor At A Time experimental strategy is?
Doesn't require many experiments. Allows for the selection from multiple factors that may improve performance. Accounts for multiple factor interactions None of the above CORRECT ANSWER: None of the above
Hypothesis testing is a statistical methodology that
Enables decisions to be absolute. Requires knowing the Type II error rate. Provides a certain amount of confidence with a decision. All of the above. CORRECT ANSWER: Provides a certain amount of confidence with a decision
What do I do if I detect a change in the process?
Ignore it until more data is available. Investigate for probable special cause(s). Plan response - seek advice from a MBB. Advise the customer and ask if they have detected anything. CORRECT ANSWER: Investigate for probable special cause(s)
When performing an analytical study, which of the following statistical values would seldom be known?
The true critical value The sample statistic The true population parameter The degree of uncertainty CORRECT ANSWER: The true population parameter
Chi-square tests are applicable only for continuous data.
True False CORRECT ANSWER: False
Which type of data would be best represented as a histogram?
Units sold per day Moving average of a commodity Engine displacement versus horsepower None of the above CORRECT ANSWER: Units sold per day.
A six sigma team is investigating the sources of variation in fabric rolls. All rolls are different in length. The variable of interest is the number of holes per unit of length. Which control chart will work best for this situation?
X-bar and R chart p chart c chart u chart CORRECT ANSWER: u chart
The process of having a six sigma team develop a problem statement helps the team
agree on key dates associated with completing major project phases achieve consensus and ownership of the process determine solutions determine how often it should meet CORRECT ANSWER: Achieve consensus and ownership of the process
The roles and responsibilities of a Champion include all of the following EXCEPT:
A Champion selects the Team Leader. A Champion reviews team progress. A Champion coordinates team logistics. A Champion assures the use of Six Sigma methods and tools. CORRECT ANSWER: A Champion coordinates team logistics. Coordinating team logistics is NOT a duty of the Champion.
Designed experiments:
Can use quantitative and qualitative data Must use quantitative data only Should be normally distributed Must be tracked with a control chart CORRECT ANSWER: Can use quantitative and qualitative data
Which tool is also referred to as a "fishbone"
Cause and Effect Diagram FMEA Box Plot and Whiskers Check Sheet CORRECT ANSWER: Cause and Effect Diagram
Which of the following documentation is not needed for the project handoff?
Control Plan DOE Plan Training and Orientation Methods Storyboard CORRECT ANSWER: DOE Plan
Which of the following is most likely a value adding activity?
Correcting a mistake or error Modification of a service attribute Proof reading Making the product CORRECT ANSWER: Making the product
The definition that states, 'total number of deficiencies divided by the total number of units' represents the calculation for:
DPMO RPN DPU DPO CORRECT ANSWER: DPU
The distribution that is used to model situations having only two possible outcomes, usually labeled as success or failure, is the:
Poisson Binomial Normal Chi-square CORRECT ANSWER: Binomial
The best source for developing a Control Plan would be which of the following?
Poka-Yoke Control Chart House of Quality FMEA CORRECT ANSWER: FMEA
Which of the following processes should be conducted before implementing a new system or solution?
Root cause evaluation matrix Risk assessment Statistically validation of the improvements ABC/BOC analysis CORRECT ANSWER: Risk assessment
Which state of team dynamics requires the leader to establish roles, expectations, and guidelines for the team?
Storming Building Forming Performing CORRECT ANSWER: Forming
If r = 0.97, as the independent variable b increase, one would expect the dependent variable to______
increase decrease stay the same can't tell CORRECT ANSWER: increase
The overall ability of two or more operators to obtain consistent results repeatedly when measuring the same set of parts and using the same measuring equipment is the definition of:
repeatability precision reproducibility accuracy CORRECT ANSWER: reproducibility
The correlation coefficient 'r' quantifies the degree of linear association between two variables. A perfect positive relationship has an 'r' value of:
0.05 1 100 0 CORRECT ANSWER: 1
Which of the following is the most useful graphical tool for promoting an understanding of process capability?
A flowchart A histogram An affinity diagram An Ishikawa diagram CORRECT ANSWER: A histogram
A statistical software program returned a p-value of 0.023. If the desired level of significance is 0.025, then the conclusion is:
Reject the null hypothesis, there is no statistical difference Reject the null hypothesis, there is a statistical difference Fail to reject the null hypothesis, there is no statistical difference Fail to reject the null hypothesis, there is a statistical difference CORRECT ANSWER: Reject the null hypothesis, there is a statistical difference.
Which of the following statements is false?
Sigma (?) is a measure of dispersion or variability. Sigma (?) is a characteristic of the population. With smaller values of ?, all values in the population lie closer to the mean. Sigma (?) is the statistic that describes the variability of the sample measurements. CORRECT ANSWER: Sigma (?) is the statistic that describes the variability of the sample measurements
Which table should be used to determine a confidence interval on the mean when standard deviation is not known and the sample size is 10?
Z t F X^2 CORRECT ANSWER: t
The 'F' distribution is used to test:
the ratio of two variances the ratio of two mean the ratio of two standard deviations none of the above CORRECT ANSWER: the ratio of two variances
A sample Z-test for population means concludes that the null hypotheses should not be rejected. This means that statistically the sample mean is ________the population mean.
the same as different than larger than not related to CORRECT ANSWER: the same as
Correction, over-production, inventory, and motion are all examples of
waste 5S target areas noise value-added activities CORRECT ANSWER: waste
Use the data from the last question. The experiment was run to evaluate the effects of hinge thickness and hardness on the force required to close a door. The following results were recorded. What is the effect of the Hinge Hardness?
-1.1 +1.1 -3.3 +3.3 CORRECT ANSWER: +1.1
The reported Cpk for a process with an average of 28, standard deviation of 1.667, and upper and lower specification limits of 15 and 35, respectively, is 1.4. The process sigma for this process would be [Hint: recall the relationship between Cpk and z]:
0.467 1.400 2.800 4.200 CORRECT ANSWER: 4.200
A LSS process refers to a process having _____ standard deviations between the average of the process center and the closest specification limit.
1 3 6 12 CORRECT ANSWER: 6
Brainstorming is most effective with groups of size:
1-2 people. 3-5 people. 6-10 people. 11-20 people. 21 or more people CORRECT ANSWER: 6-10 people.
What is the Cpk for a process with specification limits of 48 and 30 and a process mean of 42 and sigma of 4?
1.00 6.00 0.5 1.5 CORRECT ANSWER: .5
You are constructing a c chart from the data in the table below. What is the upper control limit (UCL)?
15.6 0.5 4.2 10 This is not appropriate data for a c Chart. CORRECT ANSWER: 15.6
Calculate RPN from the following: Severity = 7, Occurrence = 2 and Detectability = 5.
17.5 70 14 21 None of the above CORRECT ANSWER: 70 (7 x 2 x 5)
An experiment was run to evaluate the effects of hinge thickness and hardness on the force required to close a door. The following results were recorded. The number of factors in this experiment are?
2 3 4 5 CORRECT ANSWER: 2
Calculate the residual. (Point at 8, line crossing under point at 3)
3 6 8 5 CORRECT ANSWER: 5
Which of the following statements is incorrect about documentation of your results?
A business or function may require a report to be written. Application of adequate record retention rules do apply. Storyboards are a good way to communicate project results. Screening for intellectual property is only a concern for innovation improvements. CORRECT ANSWER: Screening for intellectual property is only a concern for innovation improvements.
Mistake Proofing means:
A technique for eliminating errors. A means to make mistakes impossible. Is used avoid human error Is also called Poka Yoke All of the above CORRECT ANSWER: All of the above
Sources for criteria for effective solutions include:
A. Morphological Box B. Customer requirements C. ANOVA results A and B A, B, and C CORRECT ANSWER: B. Customer requirements
What are the risks with not statistically validating root causes?
Actions in improve will be insufficient to address the problem The control plan will not be able to address KOVs The MBB will not certify you Control charts will not be able to be used There are no risks CORRECT ANSWER: Actions in improve will be insufficient to address the problem.
A special cause of process variation is:
Assignable to a correctable problem. A normal event. Inherent in the process Only changeable with corporate quality objectives CORRECT ANSWER: Assignable to a correctable problem.
A process has been experiencing problems lately. The operators charting the process have identified the cause to be due to a change in incoming materials. This problem is:
Attributed to purchasing A special cause A common cause A normal event CORRECT ANSWER: A special cause
When selecting recommended solutions, which of the following is NOT a good practice?
Be analytical Use data- based decision Check if results are logical Select the easiest idea from the list CORRECT ANSWER: Select the easiest idea from the list is NOT a good practice when selecting solutions.
A p-value is used in many statistical calculations. It can be described as:
Being similar to the critical statistical value as found in the statistical tables Containing an extreme test statistic probability value as obtained from the sample data Having the typical set value of 5% to 1% Being reported only when significant CORRECT ANSWER: Containing an extreme test statistic probability value as obtained from the sample data
Select the following means to identify risk.
Brainstorming of knowledgeable individuals. Review of lessons learned. Failure Modes & Effects Analyses (FMEAs). All of the above CORRECT ANSWER: All of the above
Inherent process variation is distinct from all of the following EXCEPT:
Common causes Piece to Piece variation Time to Time variation Product Spread CORRECT ANSWER: Product Spread
The probability that a X-bar point will fall outside of control limits is determined by the following except:
Comparing the F statistic to the F table. Calculating Upper and Lower Control Limits Calculating the Standard Error of Mean Comparing the Z statistic to the Z table. CORRECT ANSWER: Comparing the F statistic to the F table.
What is the benefit of piloting a solution?
Data is obtained on all possible failures of the solution Experience with taking a solution from paper to operation Puts improvements in place without needing process owner signoff. Minimizes benefits associated with cost and potential problems All of the above CORRECT ANSWER: Experience with taking a solution from paper to operation.
The implementation of a control plan in the painting department was so successful that a master black belt wants you to implement the same control plan in the final assembly line. What changes should be made before implementing the necessary control plan?
Each control plan is unique, a new plan must be developed for the final assembly line A lot of changes will be necessary No changes needed, since the two areas are in the same company Minor changes may be necessary to reflect the assembly line differences CORRECT ANSWER: Each control plan is unique, a new plan must be developed for the final assembly line
An early step in any project must be seeking the voice of the internal and external customers of a project. This statement is:
False, because projects should only be concerned with external customers. True, because both internal and external customers can be impacted by the project. True, because a project team wants to maintain good will with all customers. False, because internal projects only impact internal customers. CORRECT ANSWER: True, because both internal and external customers can be impacted by the project
What source(s) within our own company may be a source of data?
Financial records Human resource records Computer data logs All of the above None of the above CORRECT ANSWER: All of the above (Financial records, Human resource records, computer data logs)
A 4^3 experiment describes:
Four levels of three factors Three levels of three factors Four factors at three levels Full factorial randomized block experiment CORRECT ANSWER: Four levels of three factors.
An example of 'Attribute' data is:
Height of each student in 1st grade Number of students with blue eyes in the 1st grade Location of car dealerships in a large city Outdoor temperature recorded at each hour of a day on December 25th CORRECT ANSWER: Number of students with blue eyes in the 1st grade
Accuracy is:
How close the observations are to the mean How close the process average is to the target The absolute value of the difference between the USL and LSL Not relevant to Six Sigma projects CORRECT ANSWER: How close the process average is to the target is accuracy.
What does the z-value indicate?
How well the process is performing Z-value is the same as sigma Z-value refers to the elements that are excluded by the sigma value A Greenbelt's project success rate CORRECT ANSWER: How well the process is performing is indicated by the z-value.
Control charts are necessary to:
Identify process variation assignable to causes. Investigate root causes. Monitor operator productivity Demonstrate quality function deployment CORRECT ANSWER: Identify process variation assignable to causes.
Which of the following statements is/are correct concerning the images?
Image I has no lack of fit Image II has a lack of fit All of the above None of the above CORRECT ANSWER: All of the above
Reduced cycle times for a product can result in reduced work in progress and:
Increased product costs Improved operations Excess inventories Longer takt times CORRECT ANSWER: Improved operations
Which of the following is a value-added activity?
Inspection Just-In-Time Production Defect Correction Waiting CORRECT ANSWER: Just-In-Time Production
Which is the most appropriate data collection tool to use when you have identified customer measures?
Interview Focus group Survey Process spot checks CORRECT ANSWER: Survey
When analyzing a control chart and finding an "out-of-control" trend:
Investigate the process for assignable causes. Maintain the status quo Immediately adjust the process Stop recording and switch to Pre-Control methods CORRECT ANSWER: Investigate the process for assignable causes.
Identify the incorrect statement about Pareto Charts.
Is a simple histogram. Is useful for focusing attention and effort. Is best used for the Analyze phase deliverables Is based on work by an Italian economist who developed the "80/20 rule". CORRECT ANSWER: Is best used for the Analyze phase deliverables Pareto charts are not best used for Analyze phase
A shadow audience is
Is not directly affected, but influences main audiences The main audience A group that directly opposes a change A group that wishes to keep changes from seeing the light of day CORRECT ANSWER: Is not directly affected, but influences main audiences
The Z-value is a useful statistic because:
It allows comparison of different processes on a common scale.. It will always have a standard deviation of 1. It will always have a mean value of 0. All of the above. CORRECT ANSWER: All of the above
All of the following are regarding the null hypotheses EXCEPT:
It can be rejected It cannot be rejected It can be accepted It is never accepted CORRECT ANSWER: It can be accepted
Coding should be used when analyzing data because:
It will remove scale differences It will preserve the balance of the data Because it removes some forms of induced collinearity All of the above CORRECT ANSWER: All of the above
Which is an example of customer requirements?
Less assembly workers Reduced scrap Cycle time from order to delivery of less than 2 weeks Shorter shipment distances CORRECT ANSWER: Cycle time from order to delivery of less than 2 weeks
Which of the following statements about Multiple Regression are NOT correct?
Leverage plots can be used to assess the collinearity Care should be taken when using undesigned (historical) data for cause and effect analysis Collinearity among predictors means the predictors are not related to each other. Variance Inflation Factors (VIF) are a measure of the collinearity of all of the predictors at once CORRECT ANSWER: Collinearity among predictors means the predictors are not related to each other.
Measuring systems would need revisiting after improvements because.
Lower variation will increase the need for precision. Compliance to external standards. Necessary prerequisite for Six Sigma certification. Measuring systems must be deactivated. CORRECT ANSWER: Lower variation will increase the need for precision.
Which of the following is a measure of variation?
Mean Range Median Mode CORRECT ANSWER: Range
Which of the following describes poorly functioning teams?
Members act independently without inter-dependency Objectives are realistically set and met Team members listen to what is being said Facts and opinions are being distinguished CORRECT ANSWER: Members act independently without interdependancy
Cause and effect diagrams, also known as fishbone diagrams, contain which of the following categories?
Mother Nature (environment) Mean time between failures Motivation Mastery of process None of the above CORRECT ANSWER: Mother Nature (environment)
What are the 3M's of Lean waste identification?
Muri, Mura, Muda Mean, Median, Mode Method, Materials, Machined Parts Maker's Mark, Modify, Move Measure, Moderate, Manage CORRECT ANSWER: Muri, Mura, Muda
When conducting a residual analysis after fitting a model, the residuals fall within what type of distribution?
Normal Uniform Exponential Poisson Multimodal CORRECT ANSWER: Normal
Which is an attribute of a good project:
Not data driven Broad scope Clearly relates to the customer requirements Driven by whim CORRECT ANSWER: Clearly relates to the customer requirements
A sequence of four replications consists of
One experiment with three repetitions. One experiment with three levels. One experiment with three factors. Planned grouping with four blocks. CORRECT ANSWER: One experiment with three repetitions.
An attempt to minimize the impact of human error through mistake proofing a process is called:
Poka-yoke Jidohka Kaizen Muda CORRECT ANSWER: Poka-yoke
What is the best tool to use when recording discrete or low-level attribute data?
Process Map Survey Check Sheet Fishbone Diagram CORRECT ANSWER: Check Sheet
Which of the following are deliverables for the Control Phase?
Risk Analysis of the solution. Documented Control Plan. Training for procedures and responsibilities. Choices a and b are correct. All of the above. CORRECT ANSWER: All of the above
Your team has determined that there are two possible solutions to your improvement opportunity. Which best describes what should happen next?
Score each solution against the evaluation criteria and select the solution with the highest score. As a team, develop the solution selection criteria and the scoring scale. As a team, develop the solution selection criteria. Ask the Process Owner which solution to implement. Pick a solution to implement. If the performance gap is not closed, implement the other. CORRECT ANSWER: Score each solution against the evaluation criteria and select the solution with the highest score.
Typically, which of the following activities is done earliest in the formation of a project team?
Select the team Identify the objective Identify the sponsor Allocate the resources CORRECT ANSWER: Identify the objective
The benefits of a process map include all of the following EXCEPT:
Serves as a training and orientation tool Helps identify when and where to collect data Helps determine sigma values Identifies non value added activities CORRECT ANSWER: Helps determine sigma values
Which of the following activities is value-added?
Setup Process Storage Inspection CORRECT ANSWER: Process
In risk analysis, the Risk Priority Number (RPN) is determined by
Severity + Occurrence + Detection + Satisfaction (Severity * Occurrence) / Detection (Severity * Occurrence * Detection) / n-1 Severity * Occurrence * Detection Severity * Occurrence * Detection * Satisfaction CORRECT ANSWER: Severity * Occurrence * Detection
The primary purpose of a Failure Modes and Effects Analysis is to:
Solve Problems Manage the Product or Service to Be Delivered Manage Failure Risks Satisfy the Customer CORRECT ANSWER: Manage Failure Risks
Pre-Control centers the process between
Specification limits Six Sigma control limits Short Run limits ANOVA results CORRECT ANSWER: Specification limits
Statistical control is achieved in this case:
Stable processes have only common cause variation Stable processes have assignable causes of variation Processes have inherent variation exceeding control limits. Control charts are regularly produced for audit trail purposes. CORRECT ANSWER: Stable processes have only common cause variation.
SIPOC stands for
Supplier, Input, Process, Output, Customer Supplier, Internal, Process, Output, Customer Supplier, Input, Production, Output, Customer Supplier, Input, Production, Output, Control CORRECT ANSWER: Supplier, Input, Process, Output, Customer
What are the main responsibilities of a LSS Green Belt?
Teach, train, and certify Black Belts Lead project teams to achieve their objectives Provide weekly strategic consultation to executive leadership team Offer statistical expertise and advising regularly to all other belts CORRECT ANSWER: Lead project teams to achieve their objectives
Which statement is the most appropriate
Team brainstorming is a waste of time Brainstorming is a powerful tool when we need some creativity to develop solutions Brainstorming should be done with a strict minimum of participants Brainstorming is only useful within certain functions Brainstorming is most effective when key stakeholders are present. CORRECT ANSWER: Brainstorming is a powerful tool when we need some creativity to develop solutions
The most appropriate tool to use to communicate to business leadership is a?
Team storyboard. Gallery walk storyboard. A Word document. Executive storyboard. CORRECT ANSWER: Executive storyboard.
A chi-square test is used for hypothesis tests
That involve means and standard deviations That involves standard deviations. That involves variances. None of the above. CORRECT ANSWER: That involves variances.
In linear regression, which of the following is NOT an important assumption about the residuals?
That they are normally distributed. That they have a mean of zero. That they are independent of each other. That they have a high correlation (R2). CORRECT ANSWER: That they have a high correlation (R2).
Which of the following is found in a control plan?
The ANOVA results of a designed experiment. Designated control methods, tools and systems. A value stream map. A fishbone diagram for mistake proofing. CORRECT ANSWER: Designated control methods, tools and systems.
Tolerance is:
The allowable range of X while still meeting the requirements of Y The allowable range of Y while still meeting the requirements of X All of the above None of the above CORRECT ANSWER: The allowable range of X while still meeting the requirements of Y
Rolled Throughput Yield is
The composite yield from all steps in the process. Calculated from the yield of the suppliers' materials and the yield from the final step in the process. Is greater that the First Time Yield. Calculated by adding the yield from all steps in the process. CORRECT ANSWER: The composite yield from all the steps in process.
Which of the following selections is not included in the Hypothesis Protocol?
The hypotheses are always statements about the sample statistics. State your Null Hypothesis (Ho) State your Alternative Hypothesis (Ha) Test Alternative Hypothesis with an appropriate statistical test Based on the test result, we reject or fail to reject the null hypothesis Ho. CORRECT ANSWER: The hypotheses are always statements about the sample statistics.
In the analysis of the performance of a process before and after an improvement was made, what conclusion can you draw about the validation of the improvement, given that:(i) The goal was to reduce the Result to less than 10;(ii) The variances of the Before and After groups are not different;(iii) The ANOVA F-test is significant at p<0.0001
The improvement is validated and successful The improvement is statistically significant, but is not practically significant, so not successful yet. The improvement is not statistically significant, but is practically significant, so not successful yet. The improvement is neither statistically nor practically significant, so not successful yet. Not enough information to draw any of these conclusions. CORRECT ANSWER: The improvement is statistically significant, but is not practically significant, so not successful yet
When analyzing a variables control chart measuring Averages and Ranges, if Averages are within control and Ranges are increasing, there is a risk of:
The mean going out of control The mean increasing over time The mean decreasing over time The mean trending closer to the center. CORRECT ANSWER: The mean going out of control
Consider the following data set: 3, 4, 7, 7, 8, 11, 12, 13
The mean is greater than the mode The median is less than the mode The mean is less than the median The mode and the median are the same CORRECT ANSWER: The mean is greater than the mode
In order for a problem to be solved correctly, which of the following must occur first?
The problem must be defined. Relevant data must be gathered. The measurement system must be validated. The process must be mapped. CORRECT ANSWER: The problem must be defined.
A Measurement System Analysis is reconsidered for Control because:
The process team will have to do the measurements on a frequent basis. Changes have been made in the operational factors. It is necessary to make sure the measurement system is capable. All of the above. CORRECT ANSWER: All of the above.
The objective of the define phase of a six sigma project is to define:
The quality policy The customer, core business process involved and CTQ business issues The statistics work instructions The procedures manual for control charting CORRECT ANSWER: The customer, core business process involved and CTQ business issues
When making measurements with test instruments, precision and accuracy mean:
The same The opposite Consistency and correctness, respectively Exactness and traceability, respectively CORRECT ANSWER: Consistency and correctness, respectively
In order to calculate a performance index, specifically Cp, what two facts must be known about the process?
The specification limits and the standard deviation The specification limits, process average and process control limits The process standard deviation and Z value The process confidence interval and process average CORRECT ANSWER: The specification limits, and the standard deviation.
Which is not true about a team champion?
They act as a liaison between the team and organization They work to gain support for the project They are an expert in the project subject matter They should be of a mid to senior level manager status in order to gain proper influence CORRECT ANSWER: They are an expert in the project subject matter
A Value Stream Map does not include the following.
Time to move material from one location to another. Special symbols and icons Itemized costs Comprehensive diagram of how material and information provide the product for the customer. CORRECT ANSWER: Itemized costs. A Value Stream Map does NOT include itemized costs.
Everything the Process Owner needs to sustain the improved performance is contained on the Control Plan document.
True False CORRECT ANSWER: False
A Storyboard presentation summarizes the important deliverables of all phases and must be a single slide in length.
True False CORRECT ANSWER: True
Cycle time is another term for Process Time.
True False CORRECT ANSWER: True
The FMEA tool is used to assess risk from the current process and with the future improvements.
True False CORRECT ANSWER: True
Process Capability only addresses how much the process is on-target.
True False CORRECT ANSWER: False
The FMEA tool is a recommended tool to assess risk because of its objectivity.
True False CORRECT ANSWER: False
The statistical terms "confidence" and "significance" have the same meaning.
True False CORRECT ANSWER: False
Which is not one of the three maps of a process that a GBPL needs to consider?
What is actually happening. What you think may be happening. What you want to be happening. What processes competitors use. CORRECT ANSWER: What processes competitors use. GBPL should consider what is happening, what they think may be happening, and what they want to be happening, NOT what processes competitors use.
Which of the following is not a guideline to capturing critical to customer qualities?
Write the requirements, not the solution Use measurable terms Write from a supplier perspective Be concise CORRECT ANSWER: Write from a supplier perspective
The test used for testing independence of categorical variables is the:
Z-test t-test F-test Chi-square test CORRECT ANSWER: Chi-square test
Precision is best described as
a comparison to a known standard the achievement of expected outgoing quality the repeated consistency of results the difference between an average measurement and the actual value CORRECT ANSWER: The repeated consistency of results
Which of the following is an example of a defect?
a. A package delivered to the address on the label b. On-time flight arrival c. Computer network disruption d. Unintended vehicle acceleration Both C and D CORRECT ANSWER: Both C and D
A stakeholder list is used in doing which of the following?
a. Ensuring the project leader has identified key stakeholders b. Lists groups/individuals involved in each phase of the process c. Determines compensation for each of the stakeholders a. and b. CORRECT ANSWER: a. and b.
In the equation Y = f(x), which of the following is an 'x'?
a. Inputs & process b. Effects c. Symptoms d. Causes Both a and d CORRECT ANSWER: Both a and d. Both inputs & process and causes are 'x's.
The objective(s) of the Control Phase include:
a. Mechanisms to maintain improved performance. b. Enabling the Process Owner and her team to c. implement the improved performance. d. Review the alternatives for achieving the project goal. e. Maintain the Green Belt to lead the improved process. Choices a and b are correct. CORRECT ANSWER: Mechanisms to maintain improved performance.
Sigma capability measures:
a. The capability of the process to perform defect free b. The capability of the process provide customer satisfaction Both a and b Neither a or b CORRECT ANSWER: Both a and b
Which is a component of total variability?
a. Turnaround time variability b. Measurement variability c. Process design variability Both B and C CORRECT ANSWER: Both B and C
The business case answers which of the following questions?
a. Why is the project worth doing? b. Why is it important to do now? c. Specifically, how will the problem be solved? a and b All of the above CORRECT ANSWER: a and b
A process capability analysis is NOT used to
determine the ability of a process to meet specifications maintain a process in a state of statistical control establish new specifications prioritize competing processes CORRECT ANSWER: maintain a process in a state of statistical control
