Question 1

Which of the following dispatching rules tends to minimize job flow time?

Accepted Answer

A) FCFS: first come,first served 
B) SPT: shortest processing time 
C) EDD: earliest due date 
D) LPT: longest processing time 
E) FCLS: first come,last served 
A) FCFS: first come,first served 
B) SPT: shortest processing time 
C) EDD: earliest due date 
D) LPT: longest processing time 
E) FCLS: first come,last served

Question 2

Eight jobs have been sequenced at a single work center.Total processing time for the eight jobs is 34 hours,and total flow time for the sequence is 85 hours.For this schedule,utilization is ________ and the average number of jobs in the system is ________.

Accepted Answer

A) 100 percent;10.625 
B) low;.0941 
C) 0.400 or 40 percent;2.5 
D) 0.235 or 23.5 percent;4.25 
E) maximized;minimized 
A) 100 percent;10.625 
B) low;.0941 
C) 0.400 or 40 percent;2.5 
D) 0.235 or 23.5 percent;4.25 
E) maximized;minimized

Question 3

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

Accepted Answer

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

Question 4

Consider the arrival of patients into a public health clinic.Some patients are ill;some are injured;some are elderly;and some are very young.Some cases may be life-threatening,while others are inconsequential.How do the basic dispatch rules fall short in this situation? Design a dispatch rule for scheduling these patients.

Accepted Answer

All of the rules are inappropriate,becau

Question 5

What makes short-term scheduling of strategic importance?

Accepted Answer

1.Internally effective scheduling means

Question 6

One criterion for developing effective schedules is minimizing completion time.

Accepted Answer

A) True 
 B)False

Question 7

Using LPT priority would result in what sequence for Jobs A,B,C,and D if their process times are 4,6,5,and 2 respectively?

Accepted Answer

A) ABCD 
B) DCBA 
C) DACB 
D) DABC 
E) BCAD 
A) ABCD 
B) DCBA 
C) DACB 
D) DABC 
E) BCAD

Question 8

Short-term schedules are prepared:

Accepted Answer

A) directly from the aggregate plans. 
B) directly from the capacity plans. 
C) from inventory records for items that have been used up. 
D) from master schedules,which are derived from aggregate plans. 
E) from the purchasing plans. 
A) directly from the aggregate plans. 
B) directly from the capacity plans. 
C) from inventory records for items that have been used up. 
D) from master schedules,which are derived from aggregate plans. 
E) from the purchasing plans.

Question 9

In services,the scheduling emphasis is usually on staffing levels,not materials.

Accepted Answer

A) True 
 B)False

Question 10

When a set of jobs must pass through two workstations whose sequence is fixed,________ is the sequencing rule most commonly applied.

Accepted Answer

A) critical ratio 
B) earliest due date 
C) first come,first served 
D) slack time remaining 
E) Johnson's rule 
A) critical ratio 
B) earliest due date 
C) first come,first served 
D) slack time remaining 
E) Johnson's rule

Question 11

What is a scheduling technique used to achieve an optimum,one-to-one matching of tasks and resources?

Accepted Answer

A) the assignment method 
B) Johnson's rule 
C) the CDS algorithm 
D) the appointment method 
E) the reservation method 
A) the assignment method 
B) Johnson's rule 
C) the CDS algorithm 
D) the appointment method 
E) the reservation method

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

(a)A summary of calculations appears in

Question 13

A firm that specializes in desktop publishing for local charities has agreed to take on the following jobs.The firm has not decided which dispatching rule to apply in order to prioritize the jobs and fix them into the schedule.All dates are specified as days from today.
   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

(a)The table of results appears below.A

Question 14

Orders are processed in the sequence in which they arrive if (the)________ rule sequences the jobs.

Accepted Answer

A) earliest due date 
B) slack time remaining 
C) first come,first served 
D) critical ratio 
E) Johnson's 
A) earliest due date 
B) slack time remaining 
C) first come,first served 
D) critical ratio 
E) Johnson's

Question 15

Because of the significance of labor in the scheduling of services,behavioral and social issues,wage and hour laws,and union contracts all complicate the scheduling process.

Accepted Answer

A) True 
 B)False

Question 16

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 17

Briefly describe how "the unexpected" makes short-term scheduling at Alaska Airlines a challenge.Also describe how Alaska Airlines meets that challenge,and achieves competitive advantage through short-term scheduling.

Accepted Answer

The unexpected refers to delays and canc

Question 18

Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2).The processing times are given in the table below.
a.What is the optimal sequence?
b.What is the total flow time for this sequence?

Accepted Answer

(a,b)The optimal sequence is M

Question 19

What does Johnson's rule do?

Accepted Answer

Johnson's rule is an approach

Question 20

A work center had planned outputs of 10,15,13,and 20 hours with actual outputs of 12,14,13,and 18 hours.What is the cumulative deviation in output?

Accepted Answer

A) 0 
B) 1 
C) -1 
D) 58 
E) Unable to determine with the given information 
A) 0 
B) 1 
C) -1 
D) 58 
E) Unable to determine with the given information

Exam 15: Short-Term Scheduling

Which of the following dispatching rules tends to minimize job flow time?

Eight jobs have been sequenced at a single work center.Total processing time for the eight jobs is 34 hours,and total flow time for the sequence is 85 hours.For this schedule,utilization is ________ and the average number of jobs in the system is ________.

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

What makes short-term scheduling of strategic importance?

One criterion for developing effective schedules is minimizing completion time.

Using LPT priority would result in what sequence for Jobs A,B,C,and D if their process times are 4,6,5,and 2 respectively?

Short-term schedules are prepared:

In services,the scheduling emphasis is usually on staffing levels,not materials.

When a set of jobs must pass through two workstations whose sequence is fixed,________ is the sequencing rule most commonly applied.

What is a scheduling technique used to achieve an optimum,one-to-one matching of tasks and resources?

Orders are processed in the sequence in which they arrive if (the)________ rule sequences the jobs.

Because of the significance of labor in the scheduling of services,behavioral and social issues,wage and hour laws,and union contracts all complicate the scheduling process.

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

Briefly describe how "the unexpected" makes short-term scheduling at Alaska Airlines a challenge.Also describe how Alaska Airlines meets that challenge,and achieves competitive advantage through short-term scheduling.

Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2).The processing times are given in the table below. a.What is the optimal sequence? b.What is the total flow time for this sequence?

What does Johnson's rule do?

A work center had planned outputs of 10,15,13,and 20 hours with actual outputs of 12,14,13,and 18 hours.What is the cumulative deviation in output?

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Eight jobs have been sequenced at a single work center.Total processing time for the eight jobs is 34 hours,and total flow time for the sequence is 85 hours.For this schedule,utilization is and the average number of jobs in the system is .