Deck 15: Scheduling

Question 1

A well designed high-volume system will minimize _________ inventory and reduce _____________for the product or service.

A)work-in-process, throughput time
B)raw material, storage capacity
C)finished, throughput time
D)work-in-process, storage capacity
E)finished, transportation cost

Answer 1

A

Question 2

Which of the following scheduling rules is a global priority rule?

A)first come, first served
B)last come, first served
C)earliest due date
D)shortest processing time
E)slack per remaining operations

Answer 2

E

Question 3

Which of the following techniques loads jobs without regard to the capacity available to do the work?

A)finite loading
B)infinite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Answer 3

B

Question 4

Which of the following scheduling techniques determines the earliest possible completion time for a job?

A)finite loading
B)infinite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Question 5

Scheduling in the high-volume environment is typically done through what?

A)priority rules
B)line design and balancing
C)Thompson's rule
D)Simpson's rule
E)Johnson's rule

Question 6

If the schedule shows a 5 day slack between the end of Task A and start of Task B, this means:

A)you must start Task B as soon as Task A ends.
B)Task B start is late.
C)Task A is taking longer to complete.
D)Task A and Task B should be performed concurrently.
E)Task B start can be delayed up to 5 days after Task A's scheduled completion.

Question 7

Slack can be calculated if _______________________.

A)infinite loading and finite loading are used together
B)infinite loading and forward scheduling are used together
C)finite loading and backward scheduling are used together
D)finite loading and forward scheduling are used together
E)forward scheduling and backward scheduling are used together

Question 8

Which of the following scheduling techniques tends to break down over the long term?

A)input/output control
B)infinite loading
C)forward scheduling
D)backward scheduling
E)finite loading

Question 9

Which of the following scheduling techniques can be used to identify resource bottlenecks?

A)finite loading
B)infinite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Question 10

Flow operations can be ________ or ________ operations.

A)intermittent, continuous
B)intermittent, repetitive
C)repetitive, single shot
D)repetitive, continuous
E)single shot, continuous

Question 11

Which of the following techniques determines when the job must begin in order to be completed by the due date?

A)infinite loading
B)finite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Question 12

A progress chart shows the relationship between:

A)a Gantt chart and PERT chart
B)vacation schedule and work schedule
C)forecast and historical performance
D)planned and actual performance
E)planned and actual efficiency

Question 13

Which of the following techniques is used to monitor work flow at individual work centers?

A)infinite loading
B)finite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Question 14

Slim-Quick Inc. produces a variety of nutritional diet products. Management wants to evaluate the performance of Work Center 10, the bottleneck in the packaging line. They are particularly worried about the backlogging problem in the work center. The following input/output report is given.


The initial backlog was 100 hours. Based on the above information, calculate the backlog hours of Work Center 10 at the end of period 3.

A)100
B)110
C)140
D)150
E)200

Question 15

Which of the following techniques loads jobs up to a predetermined capacity level?

A)finite loading
B)infinite loading
C)forward scheduling
D)backward scheduling
E)input/output control

Question 16

Quick-Slim Inc. produces a variety of nutritional diet products. Management wants to evaluate the performance of Work Center 10, the bottleneck in the packaging line. The following input report is given.

Calculate the cumulative deviation of the input at the end of period 3.

A)-20
B)-30
C)10
D)20
E)30

Question 17

Which of the following is not a feature of job-shop operations?

A)a process layout
B)highly skilled employees
C)special-purpose equipment and tooling
D)highly customized products
E)low volume production

Question 18

Which of the following is not a feature of flow operations?

A)a process layout
B)fixed routings
C)special-purpose equipment and tooling
D)high volume production
E)high levels of labor and equipment utilization

Question 19

The two different approaches to load work centers in job-shop scheduling are __________________.

A)load chart and process chart
B)finite loading and infinite loading
C)input control and output control
D)fixed routings and line balancing
E)makespan and linear programming

Question 20

Which of the following is most likely the reason you may have to wait at the doctor's office?

A)infinite loading
B)finite loading
C)forward scheduling
D)backward scheduling
E)none of these answer choices are correct

Question 21

Which of the following is a measure of whether the job is done ahead of, on, or behind schedule?

A)average number of jobs in system
B)mean flow time
C)makespan
D)job tardiness
E)job lateness

Question 22

A measure of response time is:

A)makespan
B)job flow time
C)due date
D)job lateness
E)job schedule time

Question 23

A Dallas firm manufactures dishwashing liquid. The manager wants to evaluate the performance of station 3, the bottleneck in the filling operation. The following output report is given.

Calculate the cumulative deviation of the output at the end of period 3.

A)-20
B)-40
C)10
D)20
E)40

Question 24

Sweet-Dreams Inc. manufactures custom pillows. Five jobs are waiting to be processed. Job A has a flow time of 8 days, job B has a flow time of 10 days, job C has a flow time of 15 days, job D has a flow time of 20 days, and job E has a flow time of 27 days. What is the mean flow time?

A)8 days
B)10 days
C)7 days
D)0 days
E)16 days

Question 25

The following jobs must be processed in the Super Clean motor shop. Assume that the company operates seven days per week. Using FCFS as the priority rule, calculate average job tardiness.

A)0
B)6
C))5
D)-2.833
E)-8

Question 26

Heavy Eyes Inc. manufactures custom pillows. Five jobs are waiting to be processed using the SPT priority rule. Their processing times are shown in the following table. What is the mean flow time?

A)57 days
B)11.4 days
C)17 days
D)5)4 days
E)27 days

Question 27

What does average number of jobs in the system measure?

A)WIP inventory
B)due-date performance
C)makespan
D)job tardiness
E)job lateness

Question 28

A greater number of jobs in the system implies what?

A)a higher work-in-process inventory level and a longer response time
B)a lower work-in-process inventory level and a longer response time
C)a higher work-in-process inventory level and a shorter response time
D)a lower work-in-process inventory level and a shorter response time
E)more jobs will certainly be tardy.

Question 29

If your company is concerned with customer response time you will measure scheduling effectiveness in terms of:

A)job reject rates
B)job profit ratio
C)response time
D)input time
E)makespan

Question 30

What is Period 3's standard hour deviation for Frank's manufacturing firm, based on the following input/output information?

a)4, -5
b)-3, 2
c)3, -2
d)2, -2
e)-14, 2
Ans d

Question 31

Using the S/RO rule, which of the following jobs will be scheduled first?

A)the first job that arrives at a work center
B)the job with the least slack per remaining operations
C)the job with the highest slack per remaining operations
D)the job with the smallest ratio of time remaining until due date to process time remaining
E)the job with the largest ratio of time remaining until due date to process time remaining

Question 32

Operation sequencing creates a work center plan based on available _______ and ______.

A)capacity, priorities
B)demand, priorities
C)capacity, demand
D)capacity, rules
E)staff, management

Question 33

What does job flow time measure?

A)the time a job spends in the shop
B)due-date performance
C)the amount of time it takes to finish a batch of jobs
D)job tardiness
E)job lateness

Question 34

Green Inc. manufactures a variety of wooden desks. Five jobs are waiting to be processed using the LPT priority rule. Their processing times are shown in the following table. What is the makespan?

A)66
B)13.2
C)27
D)5)4
E)2)4

Question 35

What does makespan measure?

A)WIP inventory
B)due-date performance
C)the amount of time it takes to finish a batch of jobs
D)job tardiness
E)job lateness

Question 36

Job A is due on day 15, and it is finished on day 12. What is its lateness?

A)-3
B)0
C)3
D)both -3 and 3
E)none of these answer choices are correct

Question 37

Which of the following is not an assumption of priority rules?

A)There is no variability in the setup time.
B)There is no variability in the run time of the job.
C)Multiple jobs are waiting to be processed.
D)Only a single job is waiting to be processed.
E) None of these answer choices are correct.

Question 38

If using CR as the priority rule, which of the following jobs will be scheduled first?

A)the first job arrives at a work center
B)the job with the least slack per remaining operations
C)the job with the highest slack per remaining operations
D)the job with the smallest ratio of time remaining until due date to process time remaining
E)the job with the largest ratio of time remaining until due date to process time remaining

Question 39

Sweet-Dreams Inc. manufactures custom pillows. Five jobs are waiting to be processed using the SPT priority rule. Their processing times are shown in the following table. What is the average number of jobs in the system?

A)66
B)13.2
C)27
D)5)4
E)3)38

Question 40

Which of the following is a measure of how long after the due date the job is completed?

A)job belatedness
B)mean flow time
C)makespan
D)job overdueness
E)job tardiness

Question 41

Consider a production line with five stations. The first station can process a unit in 8 minutes. The second station has two identical machines, each of which can process a unit in 18 minutes (each unit only needs to be processed on one of the two machines). The third station can process a unit in 4 minutes. The fourth station has two different machines, one can process a unit in 5 minutes, and the other one can process a unit in 9 minutes (each unit needs to be processed on both machines). The fifth station can process a unit in 10 minutes. Which station is the bottleneck station?

A)Station 1
B)Station 2
C)Station 3
D)Station 4
E)Station 5

Question 42

What does "negative lateness" mean?

A)The job is finished after its due date.
B)The job is finished on its due date.
C)The job is finished before its due date.
D)The job is not finished.
E)The job has not started.

Question 43

Which of the following scheduling rules is often considered the fairest rule?

A)first come, first served
B)last come, first served
C)earliest due date
D)shortest processing time
E)longest processing time

Question 44

Using the following data, calculate the average job lateness.

A)-2 days
B)3 days
C)13 days
D)-8 days
E)1)5 days

Question 45

Which of the following scheduling rules minimizes mean job flow time?

A)first come, first served
B)last come, first served
C)earliest due date
D)shortest processing time
E)longest processing time

Question 46

Which of the following statements is not true?

A)An hour lost at a bottleneck is an hour lost forever.
B)An hour lost at a non-bottleneck is just a mirage.
C)Bottlenecks determine throughput and system inventory.
D)The transfer batch does not have to equal the process batch.
E)Lead times are predetermined.

Question 47

Job A is due on day 15, and it is finished on day 12. What is its tardiness?

A)-3
B)0
C)3
D)both -3 and 3
E)none of these answer choices are correct

Question 48

Seven jobs must be scheduled. Each of the jobs must be processed on two machines (A and B)in the same order. The processing times are listed below. According to Johnson's rule, in what order should the jobs be processed?

A)A-E-C-G-D-B-F
B)A-C-E-G-D-B-F
C)F-B-D-G-C-E-A
D)F-D-B-G-E-C-A
E)G-D-B-F-A-E-C

Question 49

Consider a production line with five stations. Stations one through five can process a unit in 10, 15, 20, 5, and 12 minutes, respectively. What is the maximum throughput per hour?

A)6 units
B)4 units
C)3 units
D)12 units
E)5 units

Question 50

Using the following data, calculate the average job tardiness.

A)6 days
B)1)5 days
C)-2 days
D)-8 days
E)3 days

Question 51

Which of the following scheduling rules minimizes the average number of jobs in the system?

A)first come, first served
B)last come, first served
C)earliest due date
D)shortest processing time
E)longest processing time

Question 52

Which of the following sequencing rules is used for minimizing makespan in a two-stage, unidirectional process?

A)FCFS
B)S/RO
C)SPT
D)CR
E)Johnson's rule

Question 53

What is a transfer batch?

A)the quantity of finished goods that can be sold
B)the quantity of items moved at the same time from one resource to the next
C)the quantity of work-in-process inventory
D)the quantity produced at a resource before the resource is switched over to produce another product
E)the quantity of items needed to attain a full truckload (TL)shipping rate

Question 54

The process batch should:

A)match the transfer batch.
B)exceed the transfer batch.
C)be smaller than the transfer batch.
D)be fixed.
E)be variable.

Question 55

What is throughput?

A)the quantity of finished goods that can be sold
B)the quantity of items moved at the same time from one resource to the next
C)the quantity of work-in-process inventory
D)the quantity produced at a resource before the resource is switched over to produce another product
E)the average flow time of the system

Question 56

Which of the following statements is not a valid scheduling principle?

A)Balance the process rather than the flow.
B)Non-bottleneck usage is determined by some other constraint in the system.
C)Usage and activation of a resource are the same.
D)The process batch should be variable.
E)An hour lost at a bottleneck resource is an hour lost forever.

Question 57

Which of the following is mostly like to be an internal resource constraint?

A)increasing market demand
B)raw material shipping problems
C)decreasing market demand
D)no overtime
E)a regular bottleneck in the product process

Question 58

Five jobs must be scheduled. Each of the jobs must be processed on two machines (A and B)in the same order. The processing times are listed below. According to Johnson's rule, in what order should the jobs be processed?

A)C-B-D-A-E
B)C-D-A-E-B
C)B-E-A-D-C
D)C-A-E-D-B
E)C-D-E-B-A

Question 59

Which of the following is the least effective tactic for managing a bottleneck station?

A)Assign extra workers to the bottleneck station if necessary in order to keep it running.
B)Increase the production rate at the bottleneck station.
C)Inspect items just as soon as they come out of the bottleneck station.
D)Subcontract part of the workload at that station to other companies.
E)Assign your best people to that station to improve efficiency.

Question 60

What is a process batch?

A)the quantity of finished goods that can be sold
B)the quantity of items moved at the same time from one resource to the next
C)the quantity of work-in-process inventory
D)the quantity produced at a resource before the resource is switched over to produce another product
E)the set of machines used to make products

Question 61

A local priority rule sets priority based only on the jobs waiting at that individual work center.

Question 62

In a service organization, a doctor's office is a good example of finite loading.

Question 63

Optimized production technology (OPT)was introduced by Eli ____________________.

A)Goldratt
B)Manning
C)Jefferson
D)Rosenblatt
E)Strasburg

Question 64

The backlog at a work center increases when the work center receives more work than it finishes.

Question 65

Jim-O's fast focus restaurant is opening up a new branch. Based on demand forecast the following service personnel levels are anticipated. What days will employee #1 have off?

A)Mon - Tue
B)Tue - Wed
C)Wed - Thur
D)Thur - Fri
E)Fri - Sat

Question 66

Priority rules are more useful in sequencing jobs in high-volume systems than in low-volume systems.

Question 67

Jim-O's fast focus restaurant is opening up a new branch. Based on demand forecast the following service personnel levels are anticipated. What is the number of employees needed for Thursday-Friday pair?

A)7
B)9
C)10
D)11
E)12

Question 68

If customer service is important to the company, average job lateness is probably a more relevant measurement than average job tardiness.

Question 69

Flow operations are often related to high volume production.

Question 70

Forward scheduling sometimes causes inventory buildup if items are not delivered by the due date.

Question 71

Only Roses Flower Shop currently operates 7 days per week. The staffing needs for each day are shown in the following table. Each of the employees must have two consecutive days off in a week. (Since Monday is used as the first day of the pay week, an employee cannot be off on both Sunday and Monday.) What is the minimum number of employees that needs to be hired?

A)5
B)6
C)7
D)8
E)9

Question 72

A Gantt chart is usually used for a company with low flexibility in both product variation and product volume.

Question 73

Which of the following is mostly like to be a policy constraint?

A)strike at the supplier's plant
B)raw material shipping problems
C)decreasing market demand
D)no overtime
E)a regular bottleneck in the product process

Question 74

If using critical ratio (CR)as the scheduling rule, the job with the smallest ratio of time remaining until due date to the processing time remaining has the lowest priority.

Question 75

Makespan has a link to customer due dates.

Question 76

When were Gantt charts developed?

A)early 1800s
B)early 1900s
C)early 1920s
D)early 1940s
E)early 1960s

Question 77

Makespan is a measure of WIP.

Question 78

Backward scheduling determines the earliest possible completion time for a job.

Question 79

A Gantt chart is a basic scheduling tool for low-volume systems.

Question 80

If using slack per remaining operations (S/RO)as the scheduling rule, the job with the least slack per remaining operations has the highest priority.