Question 1

Describe Johnson's sequencing rule for the two-resource sequencing problem.

Accepted Answer

1. List the jobs and their processing ti

Question 2

In sequencing a set of jobs on a single processor, different sequences will have different makespans but the same average flow times.

Accepted Answer

A) True 
 B)False

Question 3

The shortest processing time rule and earliest due date rule will always provide the same sequence.

Accepted Answer

A) True 
 B)False

Question 4

Give at least five examples of service organizations and employee type) where, due to high variability in customer demand, staff scheduling problems are prevalent.

Accepted Answer

1. Call center service represe

Question 5

Triage by nurses in an emergency room would be an example of

Accepted Answer

A) Scheduling 
B) Sequencing 
C) Appointments 
D) Shortest-processing-time rule 
A) Scheduling 
B) Sequencing 
C) Appointments 
D) Shortest-processing-time rule

Question 6

A restaurant needs the following number of wait staff to serve its evening guests.
 $$\begin{array} { | c | c | c | c | c | c | c | c | } 
\hline \text { Day: } & \text { M } & \text { Tu } & \text { W } & \text { Th } & \text { F } & \text { Sa } & \text { Su } \
\hline \begin{array} { c } 
\text { Minimum Number of } \
\text { Wait Staff Needed: }
\end{array} & 5 & 2 & 1 & 4 & 6 & 7 & 2 \
\hline
\end{array}$$ 
How many employees are needed so that each as two consecutive days off? Construct a work schedule for these employees.

Accepted Answer

Seven employees are needed. Numbers unde

Question 7

Indirectly, appointments reduce the cost of providing a service because the service provider is idle less each workday.

Accepted Answer

A) True 
 B)False

Question 8

A tardiness measure can be either zero 0) or a positive number.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is NOT a criterion for evaluating job sequencing rules?

Accepted Answer

A)  average flow time 
B)  lateness 
C)  tardiness 
D)  sum of processing times 
A)  average flow time 
B)  lateness 
C)  tardiness 
D)  sum of processing times

Question 10

A company is faced with seven tasks that have to be processed through two work centers, work center I and then center II. Assume work center I works continuously and that they are using Johnson's rule. Work centers need not change over to new jobs at the same time. Data appears below in hours:
 $$\begin{array} { | c | c | c | } 
\hline \text { ask } & \text { Wark Center I } & \text { Work Center II } \
\hline \text { A } & 2.58 & 3.47 \
\hline \mathrm { B } & 1.66 & 5.84 \
\hline C & 2.71 & 2.41 \
\hline \mathrm { D } & 5.52 & 1.99 \
\hline E & 3.38 & 7.62 \
\hline \mathrm { F } & 5.22 & 1.73 \
\hline \text { G } & 2.89 & 1.11 \
\hline
\end{array}$$ 
a. What is the sequence of tasks?
b. What is the time in hours to complete all the tasks in both work centers?
c. What is the total idle time in hours for work center I?
d. What is the total idle time in hours for work center II?

Accepted Answer

a. Job order using Johnson's rule: B, A,

Question 11

The chief disadvantage of the shortest processing time rule is:

Accepted Answer

A)  average job completion times are excessive 
B)  average number of jobs in the system is excessive 
C)  long-duration jobs may have excessive completion times 
D)  average job lateness is excessive 
A)  average job completion times are excessive 
B)  average number of jobs in the system is excessive 
C)  long-duration jobs may have excessive completion times 
D)  average job lateness is excessive

Question 12

What four 4) decisions are considered in designing an appointment system?

Accepted Answer

Service capacity is perishable and appoi

Question 13

Compare and contrast the advantages and disadvantages of the Shortest Processing Time SPT) and the Earliest Due Date EDD) sequencing rules.

Accepted Answer

SPT and EDD Rules generally work well in

Question 14

The sequencing rule that minimizes the maximum number of jobs that are past due from a given set of jobs is

Accepted Answer

A) Shortest processing time 
B) Earliest due date 
C) First come, first served 
D) Least work remaining 
A) Shortest processing time 
B) Earliest due date 
C) First come, first served 
D) Least work remaining

Question 15

The time to rest and travel between games for baseball umpire crews is an important factor in developing their schedule.

Accepted Answer

A) True 
 B)False

Question 16

Telling an umpire crew to work baseball games in Chicago, then Milwaukee, and then Cleveland is an example of a sequence.

Accepted Answer

A) True 
 B)False

Question 17

Appointments systems often overbook to maximize revenue.

Accepted Answer

A) True 
 B)False

Question 18

A print shop has four jobs that have to be processed through their only five?color press. They usually use the first-come first?served method of scheduling jobs. However, the customers are waiting in the lobby for these jobs so the shop wants to minimize the average waiting time. They are going to use the shortest processing time rule to do so. Processing times for each job are as follows assume this is the arrival order): Job A, 30 minutes; Job B, 17 minutes; Job C, 12 minutes; Job D, 39 minutes.
a. In what order should the four jobs be done using the shortest processing time rule?
b. What is the average( waiting flow) time for all jobs using the shortest processing time rule?
c. What is the averaging (waiting flow) time using their usual first?come first?served rule?

Accepted Answer

a. Shortest processing time:
Order of jo

Question 19

Explain the three categories of criteria used to evaluate job sequencing performance. For each category, provide two example measures.

Accepted Answer

1. Process-focused performance criteria:

Question 20

In sequencing jobs in a flow shop with two resources, Johnson's rule finds a sequence that has the smallest makespan.

Accepted Answer

A) True 
 B)False

Exam 14: Operations Scheduling and Sequencing

Describe Johnson's sequencing rule for the two-resource sequencing problem.

In sequencing a set of jobs on a single processor, different sequences will have different makespans but the same average flow times.

The shortest processing time rule and earliest due date rule will always provide the same sequence.

Give at least five examples of service organizations and employee type) where, due to high variability in customer demand, staff scheduling problems are prevalent.

Triage by nurses in an emergency room would be an example of

A restaurant needs the following number of wait staff to serve its evening guests. Day: M Tu W Th F Sa Su Minimum Number of Wait Staff Needed: 5 2 1 4 6 7 2 How many employees are needed so that each as two consecutive days off? Construct a work schedule for these employees.

Indirectly, appointments reduce the cost of providing a service because the service provider is idle less each workday.

A tardiness measure can be either zero 0) or a positive number.

Which of the following is NOT a criterion for evaluating job sequencing rules?

The chief disadvantage of the shortest processing time rule is:

What four 4) decisions are considered in designing an appointment system?

Compare and contrast the advantages and disadvantages of the Shortest Processing Time SPT) and the Earliest Due Date EDD) sequencing rules.

The sequencing rule that minimizes the maximum number of jobs that are past due from a given set of jobs is

The time to rest and travel between games for baseball umpire crews is an important factor in developing their schedule.

Telling an umpire crew to work baseball games in Chicago, then Milwaukee, and then Cleveland is an example of a sequence.

Appointments systems often overbook to maximize revenue.

Explain the three categories of criteria used to evaluate job sequencing performance. For each category, provide two example measures.

In sequencing jobs in a flow shop with two resources, Johnson's rule finds a sequence that has the smallest makespan.

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