Question 1

Complete the table; find average lateness, average completion time, and average number of jobs in the system. Assume all durations are in days and that the jobs are processed at the shop in the order that they arrive (A then B then C then
D). Today is day 1.

Accepted Answer

The answer of Complete the table; find average lateness, average...

Question 2

The priority rule that appears fair to customers in service systems is ________.

Accepted Answer

The answer of The priority rule that appears fair to...

Question 3

A work center is interested in limiting work-in-process by not allowing production to start again until the current batch is finished. The best solution most likely involves:

Accepted Answer

A)  MRP. 
B)  ConWIP cards. 
C)  Gantt charts. 
D)  Johnson's rule. 
E)  the assignment method.

Question 4

Which of the following statements regarding scheduling at Alaska Airlines is FALSE?

Accepted Answer

A)  Flying into Alaska complicates scheduling. 
B)  Schedule changes at one airport have a ripple effect that may have impacts in many others. 
C)  Alaska Airlines' high-tech computer and communications system is located in Seattle. 
D)  Alaska Airlines' rapid rescheduling uses mathematical scheduling models. 
E)  Alaska Airlines' rapid rescheduling promotes air safety and limits traveler inconvenience, but it has not resulted in money savings for Alaska Airlines.

Question 5

The short-term scheduling activity called "loading":

Accepted Answer

A)  assigns dates to specific jobs or operations steps. 
B)  specifies the order in which jobs should be done at each center. 
C)  assigns jobs to work centers. 
D)  assigns workers to jobs. 
E)  assigns workers to machines.

Question 6

________ scheduling begins with the due date and schedules the final operation first and the other job steps in reverse order.

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The answer of ________ scheduling begins with the due date...

Question 7

Scheduling optimization systems used in retail stores typically track customer traffic in 1-hour time increments.

Accepted Answer

A) True 
 B)False

Question 8

Five jobs are waiting for processing through two work centers. Their processing time (in minutes) at each work center is contained in the table below. Each job requires work center Alpha before work center Beta. According to Johnson's rule, which job should be scheduled first in the sequence?

Accepted Answer

A)  R 
B)  S 
C)  T 
D)  U 
E)  V

Question 9

In the sequence of decisions that affect scheduling, ________ is (are) the immediate follower(s) of the master schedule (or master production schedule).

Accepted Answer

The answer of In the sequence of decisions that affect...

Question 10

What is finite capacity scheduling (FCS)?

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The answer of What is finite capacity scheduling (FCS)?...

Question 11

There are two jobs to be assigned to two workers. The cost for worker A on job 1 is $5 and on job 2 is $8. The cost for worker B on job 1 is $10 and on job 2 is $12. How should the work be divided using the assignment method?

Accepted Answer

A)  worker A assigned to job 1 and worker B assigned to job 2 
B)  worker A assigned to job 2 and worker B assigned to job 1 
C)  worker A gets both jobs 1 and 2 
D)  worker B gets both jobs 1 and 2 
E)  unable to determine

Question 12

Jack's Refrigeration Repair is under contract to repair, recondition, and/or refurbish commercial and industrial icemakers from restaurants, seafood processors, and similar organizations. Jack currently has five jobs to be scheduled, shown in the order in which they arrived.
  (a) Complete the following table. (Show your supporting calculations below).
(b) Which dispatching rule has the best score for flow time?
(c) Which dispatching rule has the best score for work-in-process (jobs in the system)?
(d) Which dispatching rule has the best score for lateness?

Accepted Answer

The answer of Jack's Refrigeration Repair is under contract to...

Question 13

Which of the following is TRUE regarding services scheduling?

Accepted Answer

A)  The critical ratio sequencing rule is widely used to provide fairness to customers. 
B)  The emphasis is on materials rather than staffing levels. 
C)  Reservations and appointments are often used to manipulate the supply of services. 
D)  Labor use can be intensive, and labor demand can be highly variable. 
E)  All of these are true.

Question 14

Given the following chart of jobs assigned with Johnson's rule, suppose that all the jobs (A, B, C, etc) could be evenly divided into two tasks (such as A1 and A2, B1 and B2, etc). Suppose job D is split into two equivalently sized sections, D1 and D2, each with a body work time of 1.5 hours and a paint time of 2 hours (D1 and D2 sum to 3 hours of body work and 4 hours of paint which is equivalent to
D). How much is makespan reduced by this splitting of D?

Accepted Answer

The answer of Given the following chart of jobs assigned...

Question 15

Finite capacity scheduling provides the user with graphical interactive computing, which is the technique's primary advantage over rule-based scheduling.

Accepted Answer

A) True 
 B)False

Question 16

The emergency room at a hospital estimates the following requirements for registered nurses (RNs) for the late night shift each week. Nurses work four consecutive days, then have off three days.
  Perform cyclical scheduling on the data. (Note that you must identify three-day patterns of minimum requirements.) How many RNs are required? How much extra capacity is required?

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The answer of The emergency room at a hospital estimates...

Question 17

What are four main criteria by which we evaluate sequencing rules?

Accepted Answer

The answer of What are four main criteria by which...

Question 18

Which of the following dispatching rules ordinarily gives the best results when the criterion is quickest time for completion of the full sequence of jobs?

Accepted Answer

A)  shortest processing time (SPT) 
B)  critical ratio (CR) 
C)  first in, first out (FIFO) 
D)  first come, first served (FCFS) 
E)  longest processing time (LPT)

Question 19

If an assignment problem consists of 5 workers and 4 projects:

Accepted Answer

A)  one worker will not get a project assignment. 
B)  one project will be assigned two workers. 
C)  the fifth worker will split time among the four projects. 
D)  one project will not get a worker assigned. 
E)  The problem cannot be solved by assignment method.

Question 20

Explain, in your own words, how backward scheduling and forward scheduling differ.

Accepted Answer

The answer of Explain, in your own words, how backward...

Exam 14: Short-Term Scheduling

Complete the table; find average lateness, average completion time, and average number of jobs in the system. Assume all durations are in days and that the jobs are processed at the shop in the order that they arrive (A then B then C then D). Today is day 1.