ISDS EXAM 2 Multiple Choice

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Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store. The number of returns were​ 10, 9,​ 11, 7,​ 3, 12,​ 8, 4,​ 6, and 11. Find the standard deviation of the sampling distribution for the ​p-bar chart.

0.0273

A waiting line model meeting the assumptions of​ M/M/1 has an arrival rate of 2 per hour and a service rate of 6 per hour. What is the utilization factor for the​ system?

0.33

An assembly line has 10 stations with times of​ 1, 2,​ 3, 4,​ ..., 10, respectively. What is the bottleneck​ time?

18.18% of the throughput time

A work system has five stations that have process times of​ 5, 9,​ 4, 9, and 8. What is the throughput time of the system?

35

Christopher's Cranks uses a machine that can produce 100 cranks per hour. The firm operates 12 hours per​ day, five days per week. Due to regularly scheduled preventive​ maintenance, the firm expects the machine to be running during approximately​ 95% of the available time. Based on experience with other​ products, the firm expects to achieve an efficiency level for the cranks of​ 85%. What is the expected weekly output of cranks for this​ company?

4,845

The Academic Computing Center has five trainers available in its computer labs to provide training sessions to students. Assume that the design capacity of the system is 1900 students per semester and that effective capacity equals​ 90% of design capacity. If the number of students who actually got their orientation session is​ 1500, what is the efficiency of the​ system?

87.7%

A work system has five stations that have process times of​ 5, 9,​ 4, 9, and 8. What is the bottleneck​ time?

9

T/F A process that is in statistical control will always yield products that meet their design specifications

False

T/F An example of the postponement strategy for improving service productivity is having the customer wait until you have sufficient time to serve the customer

False

T/F A​ waiting-line system with one waiting line and three sequential processing stages is a​ multiple-server, single-phase system

False

T/F Capacity decisions are based on technological concerns, not demand forecasts

False

T/F The typical full-service restaurant uses a product-focused process

False

T/F To measure the voltage of batteries, one would sample by attributes

False

T/F. A process is said to be in statistical control when assignable causes are the only sources of variation

False

A concert​ hall, employing both ticket takers and ushers to seat​ patrons, behaves typically as which of the​ following?

Multiple-server; multiphase style

Consider a production line with five stations. Station 1 can produce a unit in 9 minutes. Station 2 can produce a unit in 10 minutes. Station 3 has two identical machines, each of which can process a unit in 12 minutes​ (each unit only needs to be processed on one of the two machines. Station 4 can produce a unit in 5 minutes. Station 5 can produce a unit in 8 minutes. Which station is the bottleneck station?

Station 2

A manager tells her production​ employees, "It's no longer good enough that your work falls anywhere within the specification limits. I need your work to be as close to the target value as​ possible." Her thinking is reflective of:

Taguchi concepts

T/F A copy center has five machines that serve many customers throughout the day. The​ waiting-line system for copy service has an infinite​ population, while the​ waiting-line system for copier maintenance has a finite population

True

T/F A ​c-chart is appropriate to plot the number of flaws in a bolt of fabric

True

T/F Acceptance sampling accepts or rejects an entire lot based on the information contained in the sample

True

T/F Averages of small​ samples, not individual​ measurements, are generally used in statistical process control

True

T/F A​ cause-and-effect diagram helps identify the sources of a problem

True

T/F Changes in capacity may lead, lag, or straddle the demand

True

T/F Design capacity is the theoretical maximum output of a system in a given period under ideal conditions

True

T/F In process-focused facilities, utilization of facilities is low

True

T/F In statistical process​ control, the range is often used as a substitute for the standard deviation

True

T/F In the analysis of queuing​ models, the Poisson distribution often describes arrival​ rates, while service times are often described by the negative exponential distribution

True

T/F Intermittent processed are organized around processes

True

T/F Internal failure costs are associated with scrap, rework, and downtime

True

T/F Line Employees need the knowledge of TQM tools:

True

T/F Mistakes stemming from workers' inadequate training represent an assignable cause of variation

True

T/F One of the ways that​ just-in-time (or​ JIT) influences quality is that by reducing​ inventory, bad quality is exposed.

True

T/F Pareto charts are a graphical way of identifying the few critical items form the many less important ones

True

T/F TQM is important because each of the ten decisions made by operations managers deals with some aspect of identifying and meeting customer expectations

True

T/F The cost of waiting decreases as the service level increases:

True

T/F The phrase Six Sigma has two meanings. One is​ statistical, referring to an extremely high​ process, product, or service​ capability; the other is a comprehensive system for achieving and sustaining business success

True

T/F The steeper an OC curve, the better it discriminates between good and bad lots

True

A production manager at a pottery factory has noticed that about 70 percent of defects result from impurities in raw​ materials, 15 percent result from human​ error, 10 percent from machine​ malfunctions, and 5 percent from a variety of other causes

a Pareto Chart

A fishbone chart is also known as

a cause-and-effect diagram

A system in which the customer receives service from only one station and then exits the system is which of the​ following?

a single-phase system

A good layout requires determining: a. all of the above b. cost of moving between various work areas c. material handling equipment d. environment and aesthetics e. capacity and space requirements

a. all of the above

Consumer's risk is the probability of:

accepting a bad lot

A waiting line, or queuing, system has three parts, which are:

arrivals or inputs queue discipline or the waiting line itself and the service of the facility

Which of the following products is likely to be assembled on a repetitive process line?

automobiles

The common measures of a queuing​ system's performance​ include:

average time each customer spends in the​ system, probability that the service system will be​ idle, and average time each customer spends in the queue

The process of identifying other organizations that are best at some facet of your operations and then modeling your organization after them is known​ as:

benchmarking

Which of the following is not one of the four principles of bottleneck management?

bottlenecks should be moved to the end of the system process

A customer service manager at a retail clothing store has collected numerous customer complaints from the forms they fill out on merchandise returns. To analyze trends or patterns in these​ returns, she has organized these complaints into a small number of sources or factors. This is most closely related to the​ ________ tool of TQM.

cause-and-effect diagram

A successful TQM program incorporates all EXCEPT which of the following?

centralized decision-making authority

Which of the following represents a common way to manage capacity in the service sector?

changes in staffing levels

Which of the following statements regarding​ "proximity" in the location decision is​ FALSE?

clustering among fast food chains occurs because they need to be near their labor supply

For which of the following operations would a fixed-position layout be MOST appropriate?

constructing a highway tunnel

Which of the following is an example of a finite arrival population?

copy machines in a copying shop that break down

In the mass service and service factory quadrants of the service process​ matrix, the operations manager could focus on all of the following​ except:

customization

The objective of layout strategy is​ to:

develop an effective and efficient layout that will meet the​ firm's competitive requirements

Statistical process control charts:

display upper and lower limits for process variables or attributes and signal when a process is no longer in control

Which of the following is the best example of the proximity rule​ that, for service​ firms, proximity to market is the most important location​ factor?

few people will travel​ out-of state for a routine haircut

Which one of the following is NOT a characteristic of a Model A or​ M/M/1 system?

finite population size

One of the major advantages of​ process-oriented layouts​ is:

flexibility in equipment and labor assignment

An organization whose capacity is on that portion of the average unit cost curve that falls as output​ rises:

has a facility that is below optimum operating level and should build a larger facility

Which of the following assumptions is NOT associated with strategies for​ goods-producing location​ decisions?

high customer-contact issues are critical

A product-focused process is commonly used to produce:

high-volume, low-variety products

When sample measurements falls inside the control​ limits, it means​ that:

if there is no other pattern in the samples, the process is in control

Assignable Variation:

is to be identified and investigated

If a sample of items is taken and the mean of the sample is outside the control​ limits, the process​ is:

likely out of control and the cause should be investigated

The reason fast food restaurants often are found in close proximity to each other​ is:

location clustering near high traffic flows

Which of the following phrases best describes process focus?

low volume, high variety

Which of the following is not one of the strategies for improving service productivity?

mass customization

Retail layouts are based on the notion that:

maximizing customer exposure rate maximized sales and profits

Industrial location analysis typically attempts to:

minimize costs

An airline ticket counter, with several agents for one line of customers, is an example of which of the following?

multiple-server, single-phase system

Up to three standard deviations above or below the centerline is the amount of variation that statistical process control allows​ for:

natural variation

Members of quality circles​ are:

none of the above; all of the statements are false

Which of the following is NOT one of the major categories of costs associated with​ quality?

none of the above; they are all major categories of costs associated with quality

Which type of layout features departments or other functional groupings in which similar activities are​ performed?

process-oriented

What layout strategy deals with low-volume, high-variety production?

process-oriented layout

The _____ layout's main objective is to equalize the task time for each station

product oriented

Frito-Lay is to​ ________ focus as Harley Davidson is to​ ________ focus

product; repetitive

Which of these factors would be considered when making a location decision at the​ region/community level?

proximity to raw materials and customers

Which of the following is a location analysis technique typically employed by a service​ organization?

purchasing power analysis

What shape does the quality loss function exhibit?

quadratic

According to the​ manufacturing-based definition of​ quality:

quality is the degree to which a specific product conforms to standards

In location​ planning, environmental​ regulations, cost and availability of​ utilities, and taxes​ are:

regional/ community factors

Which one of the following is NOT a characteristic of a Model B or​ M/M/S system?

single server

A​ McDonald's single−lane drive−through that has one window for making the payment and a second window for receiving the food behaves most like which of the​ following?

single-server, multiphase system

Adding a complementary product to what is currently being produced is a demand management strategy used​ when:

the existing product has seasonal or cyclical demand

Which of the following statements regarding​ "Six Sigma" is​ TRUE?

the term has two distinct meanings—one is statistical; the other is a comprehensive quality system

One of the similarities between process focus and​ mass-customization is:

the variety of outputs

Which of the following represents an unlimited​ queue?

toll booth serving automobiles on an interstate

The cross over point is that production quantity where:

total costs for one process equal total costs for another process

Harley Davidson:

uses work cells to feed its assembly line

Which of the following is most likely to affect the location strategy of a manufacturing firm?

utility costs

Which of the following is FALSE regarding control​ charts?

values above the upper control limits imply that the​ product's quality is exceeding expectations

​"A special arrangement of machinery and equipment to focus on production of a single product or group of related​ products" describes what layout​ type?

work cell


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