3Multiple Choice1. In the maturity stage of a product’s life cycle, a typical operationsstrategy would be:a. increasing capacity.b. short production runs.c. cost minimization.d. increases in process stability.2. Which statement is true?a. the mission statement precedes analysis of externaland internal factors.b. market segments are selected prior to developmentof the mission statement.c. functional strategy is formulated prior to corporatestrategy.d. the marketing functional strategy dictates the pro-ducts and services that the firm will offer.
4Multiple Choice Product innovation rates are a (an): a. a goal-based measure.b. a corporate goal.c. a productivity measure.d. an external factor.Supplier reliability is a(an):b. a functional strategy.c. an internal factor.
5Multiple Choice 5. In the production of goods, as opposed to services: a. the customer may be directly involved.b. the facility should be near the customer.c. quality standards are precisely measured.d. production scheduling focuses on customerdemand rate.Assume that we are using a waiting line model toanalyze the number of service technicians neededto maintain machines in a factory. Our goal shouldbe to:a. maximize productivity of the technicians.b. minimize the number of machines needing repair.c. minimize the downtime for individual machines.d. minimize the percent of idle time of the technicians.e. minimize the total cost ( maintenance plus downtime ).
7Multiple ChoiceLines at banks where customers wait for a teller windoware usually representative of a:a. single-channel, multiphase system.b. single-channel, single-phase system.c. multichannel, multiphase system.d. multichannel, single-phase system.e. none of the above.A specialty restaurant has developed a single drive-throughwindow. Customers order, pay, and pick up their food at thesame window. Arrivals follow a Poisson distribution, whileservice times follow an exponential distribution. If the averagenumber of arrivals is six (6) per hour and the service rate istwo (2) every fifteen (15) minutes, what is the average numberof customers in the system?a. 0.50b. 4.00c. 2.25d. 3.00e. none of the above
8Multiple Choice Given the problem statement in question 10, what is the average number of customers waiting in line be-hind the person being served?a. 0.50b. 0.75c. 2.25d. 3.00e. none of the aboveGiven the problem statement in question 10, whatproportion of the time is the server busy?a. 0.25b. 0.50c. 0.75d. 2.25e. 3.00
9Multiple Choice Given the problem statement in question 10, how much time will elapse (in hours) from the time a customer entersthe line until he/she leaves the restaurant?a. 0.50b. 0.25c. 0.75d. 2.25e. 3.00At a local fast-food joint, cars arrive randomly at a rate of 12every 30 minutes. It takes an average of 2 minutes to serveeach arrival. The utilization factor for this system is:abcde. none of the above
10Multiple Choice Given the problem statement in question 14, what is the average time in the queue for each arrival?a. 2 minutesb. 4 minutesc. 6 minutesd. 8 minutese. 10 minutes16. A business has three (3) fax machines. The toner in eachmachine needs to be changed after about five (5) hours ofuse. There is one (1) secretary who is responsible for thefax machine maintenance. It takes the secretary fifteen (15)minutes to replace the toner cartridge.What is the probability that two (2) fax machines need tonerat the same time? (select closest value)abcde
11Multiple Choice17. A single automatic carwash with one bay and a cycle timeof 2.5 minutes is what type of model?a. M/M/1b. M/M/2c. M/D/2d. M/D/1e. M/G/118. The utilization factor is defined as the:a. percent of time the system is idle.b. average percent of time the customers wait in line.c. average time the service system is open.d. average length of the service line.e. none of the above.
12Multiple Choice In queuing analysis, total expected cost is the sum of expected ________plus expected________.a. service costs, arrival costs.b. facility costs, calling costs.c. calling costs, inventory costs.d. calling costs, waiting costs.e. service costs, waiting costs.Commonly obtained measures of a queuing system’sperformance include:a. average time each customer spends in the system,and the probability that the service system will be idle.b. the average queue length, and the maximum time acustomer may spend in the queue.c. maximum queue length, and the probability of a specificnumber of customers in the system.d. average queue length, and the probability that the waitingtime will exceed a specified period.
13Multiple Choice21. A maintenance shop employing one mechanic and servicing50 machines would be described as a:a. single-channel, priority system.b. multi-channel, infinite calling population system.c. single-channel, finite calling population system.d. multi-channel, finite calling population system.22. The service faclity is a combination of:a. arrival rates and service rates.b. servers and customers.c. queue length and queue discipline.d. channels and phases.
14True or False23. In queuing theory, the theoretical frequency distribution of thesystem arrivals must be statistically identical to the observedfrequency distribution of system arrivals.TRUE FALSE24. The most common queuing models assume a service rate thatis normally distributed.25. In a restaurant, the average time spent in the system is the timebetween a customer’s arrival and departure.
15True or FalseGiven the value of ‘lambda’ ( λ ) , a theoretical frequencydistribution for system arrivals can be identified.TRUE FALSE27. All queuing systems exhibit first-in, first-out queue discipline.
16True or False28. It is impossible to develop a process that has zero variability.TRUE FALSE29. Assignable variations in a process are also called naturalvariations.30. An x-bar chart would be appropriate to monitor the number ofdefects in a production lot.31. The central limit theorem provides the statistical foundationfor control charts.
17True or FalseIf we are tracking quality of performance for a class of students,we should plot the pass/fail result on a p-chart.TRUE FALSESample sizes as small as five (5) can be used when buildingcontrol charts.34. If we are attempting to control the diameter of bowling balls, wewill find a p-chart to be quite helpful.A c-chart would be appropriate to monitor the number of welddefects on the steel plates of a ship’s hull.
18Multiple ChoiceBags of pretzels are sampled to ensure proper weight. Theoverall average for the samples is nine (9) ounces.Each sample contains 25 bags. The standard deviation isestimated to be three (3) ounces. The upper control chartlimit ( for 99.7% confidence ) for the average would be ____ounces.ab. 18.0c. 10.2de. 10.837. R-charts measure changes in:a. central tendency.b. degree of variation.c. number of defects per production lot.d. natural variations.e. none of the above.
19Multiple ChoiceBags of chocolate candy are sampled to ensure proper weight.The overall average for the samples is 36 ounces. Each samplecontains twelve (12) bags. The average range is 1.3 ounces. Theupper control chart limit for the average would be:abcdeBags of tea are sampled to ensure proper weight. The overallaverage for the samples is eight (8) ounces. Each sample contains10 bags. The average range is 0.1 ounces. What is the lower limitof the average chart?abcde
20Multiple Choice The average range of a process for packaging cereal is 1.1 ounces. If the sample size is ten (10), find the uppercontrol chart limit for the range chart.abcdeGiven the problem statement in question 40, find thelower control chart limit for the range chart.
21Multiple ChoiceDefects in computer hard-drives will usually render theentire computer worthless. For a particular model, thepercent defective in the past has been 1%. If a samplesize of 400 is taken, what would the 95.5% lower controlchart limit be?abcdeDefects in marble countertops usually require the wholetop to be reconstructed. In one kitchen shop, the percentdefective in the past has been one (1) percent. If a samplesize of 30 is taken, what should be the 95.5% upper controllimit?abcde
22Multiple ChoiceA firm has been receiving complaints about the attitude ofsome sales clerks. Over a 10-day period, the total numberof complaints was 360. The firm wishes to develop a controlchart for the number of complaints. What would the uppercontrol limit on the number of complaints per day be for a3 sigma ( 99.7% ) control chart?a. 18b. 36c. 42d. 54e. 62Given the same problem statement above, the total numberof complaints is now 250. What would the lower control limiton the number of complaints per day be for a 3 sigma ( 99.7% )control chart?a. 20b. 0c. 15d. 10e
23Multiple Choice 46. Who introduced control charts in 1924? a. W. Edwards Demingb. Philip Crosbyc. J.M. Jurand. William Shewharte. Malcolm BaldrigeTo guarantee that cans of soda are properly filled, some cansare sampled and the amounts measured. The overall averagefor the samples is 12 ounces. Each sample contains 10 cans.The average range is 0.4 ounces. The lower control chart limitfor the average would be:abcde
24Multiple Choice 48. The control chart: a. focuses on the time dimension of a system.b. captures the natural variability in the system.c. can be used for categorical, discrete, or continuousvariables.d. all of the above.Which of the following situations suggests a processthat appears to be operating in a state of statisticalcontrol?a. a control chart with a series of consecutive points thatare above the center line and a series of consecutivepoints that are below the center line.b. a control chart in which no points fall outside either theupper control limit or the lower control limit, and nopatterns are present.c. a control chart in which several points fall outside theupper control limit.
25Multiple ChoiceA political pollster randomly selects a sample of 100 voters each dayfor 8 successive days and asks how many will vote for the incumbent.The pollster wishes to construct a ‘p’ chart to see if the percentagefavoring the incumbent candidate is too eratic.Sample (Day) Number Favoring IncumbentWhat is the numerical value of the center line for the ‘p’ chart?a. .53b. .56c. .63d. .66
26Multiple ChoiceGiven the problem statement above, what is the numericalvalue of the lower control limit for the ‘p’ chart?abcd52. When using the shortest-route technique, the 1st step is to:a. connect the nearest node that minimizes the total distanceto the origin.b. trace the path from the warehouse to the plant.c. determine he average distance traveled from source to end.d. find the nearest node to the origin and put a distance boxby the node.
27Multiple Choice53. When using the shortest-route technique, the 2nd step is to:a. find the next-nearest node to the origin and put the distancein a box by the node.b. trace the path from the warehouse to the plant.c. determine the average distance traveled from source to end.d. find the furthest node from the origin and put a distance boxby the node.e. none of the above.All the nodes must be connected in which of the followingtechniques?a. minimal-flow.b. maximal-spanning tree.c. shortest-route.d. maximal-flow.e. minimal-spanning tree.
28Multiple ChoiceGiven the following distances between destination nodes,what is the minimum distance that connects all the nodes?From To Distancea. 450b. 150c. 350d. 650e. none of the above.
29Multiple ChoiceGiven the following distances between destination nodes,what is the minimum distance that connects all the nodes?From To Distanceabcd. 1200e. none of the above.
30Multiple Choice Find the shortest route from Node 1 to Node 6: From Node To Node Distancea. 300b. 450c. 550d. 650e. none of the above.
31Multiple Choice58. In network models, the lines connecting the nodes are called:a. bridges.b. arrows.c. spans.d. arcs.e. links.59. The minimal-spanning technique ( minimal-spanning tree )would best be used:a. to assign workers to jobs in the cheapest manner.b. to determine LAN network wiring within a building.c. to minimize traffic flow on a busy highway.d. by a trucking firm making frequent but repeatable drops.e. to determine the number of units to ship from each sourceto each destination.
32Multiple Choice Find the shortest route from Node 1 to Node 4: From Node To Node Distancea. 750b. 500c. 550d. 600e
33True or False61. In the minimal-spanning tree technique, it is necessary to startat the last node in the network.TRUE FALSE62. In the minimal-spanning tree technique, if there is a tie for thenearest node, that suggests that there may be more than oneoptimal solution.63. In the minimal spanning-tree and shortest-route models, thepoints on the network are referred to as ‘nodes’.
34True or False64. The minimal-spanning tree technique and the shortest-route technique obtain the same optimal solution.TRUE FALSEThe shortest-route technique finds the maximum flowof any quantity or substance through a network.