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Exam 14: Operations Scheduling and Sequencing

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Question 1

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In the context of sequencing, the _____ minimizes the average lateness of a set of jobs.

A) shortest processing time rule
B) earliest due date rule
C) first come, first serve rule
D) fewest number of operations remaining rule

E) A) and C)
F) A) and B)

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Question 2

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In the context of sequencing, the shortest processing time (SPT) rule tends to:

A) maximize the number of jobs in the system.
B) maximize average flow time.
C) minimize resource utilization.
D) minimize work-in-process inventory.

E) None of the above
F) B) and C)

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Question 3

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The Clarke-Wright Heuristic Method is used to solve the common scheduling problem in logistics that involves determining routes from a central depot or warehouse to many customers.

In the context of operations management,__________refers to the assignment of start and completion times to particular jobs, people, or equipment.

Five jobs are ready for processing at time zero through a workstation. The details of the processing time and the due date of completion is provided in the following table. $\begin{array} { | l | l | l | } \hline \text { Job } & \text { Processing Time (days) } & \text { Due Date } \\\hline \text { A } & 6 & 18 \\\hline \text { B } & 3 & 14 \\\hline \text { C } & 4 & 9 \\\hline \text { D } & 5 & 19 \\\hline \text { E } & 2 & 11 \\\hline\end{array}$ Using the earliest due date (EDD) rule, the average flow time for the five jobs is _____.

A requirement of two-resource sequencing rule is that:

In the context of sequencing,__________is the difference between the completion time and the due date of a job.

There are five jobs in a factory. All these jobs have to go through two workstations for processing. Each job is processed on Workstation #1 and then on Workstation #2. The processing time for each job on each workstation is given below. $\begin{array} { | l | l | l | } \hline \text { Job } & \text { Time on Workstation {\#}1(minutes) } & \text {Time on Workstation {\#}2 (minutes) } \\\hline \text { A } & 50 & 50 \\\hline \text { B } & 20 & 8 \\\hline \text { C } & 25 & 50 \\\hline \text { D } & 30 & 12 \\\hline \text { E } & 11 & 22 \\\hline \text { F } & 11 & 19 \\\hline\end{array}$ Using Johnson's sequencing rule, it can be concluded that the makespan of the sequence is:

In the context of sequencing, the earliest due date (EDD) rule:

Five jobs are ready for processing at time zero through a workstation. The details of the processing time and the due date of completion is provided in the following table. $\begin{array} { | l | l | l | } \hline \text { Job } & \text { Processing Time (days) } & \text { Due Date } \\\hline \mathrm { A } & 8 & 12 \\\hline \mathrm { B } & 4 & 9 \\\hline \mathrm { C } & 3 & 6 \\\hline \mathrm { D } & 7 & 7 \\\hline \mathrm { E } & 5 & 20 \\\hline\end{array}$ Using the shortest processing time (SPT) rule, it can be concluded that the average flow time for these five jobs is _____.

Five jobs are ready for processing at time zero through a workstation. The details regarding the processing time and the due date of completion is provided in the following table. $\begin{array} { | l | l | l | } \hline \text { Job } & \text { Processing Time (days) } & \text { Due Date } \\\hline \mathrm { A } & 6 & 10 \\\hline \mathrm { B } & 5 & 17 \\\hline \mathrm { C } & 2 & 13 \\\hline \mathrm { D } & 3 & 9 \\\hline \text { E } & 4 & 15 \\\hline\end{array}$ Using the earliest due date (EDD) rule, the average tardiness of the five jobs is:

Different industries use different software packages for scheduling because every industry has different problem structures.

In the context of operations management, triage nurses deciding on the order in which emergency patients are to be treated is an example of _____.

Two examples of process-focused performance measures for sequencing rules are tardiness and lateness.

In a two-resource sequencing problem, _____.

An electronic gadgets store requires the following minimum number of employees, each of whom is required to have two consecutive days off. $\begin{array} { | l | l | l | l | l | l | l | l | } \hline \text { Day: } & \text { Mon. } & \text { Tue. } & \text { Wed. } & \text { Thur. } & \text { Fri. } & \text { Sat. } & \text { Sun. } \\\hline \begin{array} { l } \text { Minimum } \\\text { employees } \\\text { required: }\end{array} & 9 & 2 & 8 & 6 & 9 & 1 & 3 \\\hline\end{array}$ If there are no day offs provided on Thursday and Friday, the number of employees required to work on Thursday as per the final employee schedule is _____.

Gantt charts are used to:

In the context of sequencing,__________is the amount of time by which the completion time exceeds the due date of a job.

A new surgical facility called Cut & Sew has opened in the United States. The branches of the facility are spread throughout the country. These are job shops that handle a variety of outpatient surgical procedures. The process of the facility is set up in a way that one doctor will cut and another will sew. The data regarding the patients and the estimated time for cutting and sewing for each patient are given in the following table: $\begin{array} { | l | l | l | } \hline \text { Patient } & \text { Cut Time (hours) } & \text { Sew Time (hours) } \\\hline \mathrm { A } & 2.3 & 2.8 \\\hline \mathrm { B } & 2.5 & 3.0 \\\hline \mathrm { C } & 2.0 & 1.5 \\\hline \mathrm { D } & 0.6 & 1.0 \\\hline \mathrm { E } & 3.6 & 2.6 \\\hline\end{array}$ Using Johnson's sequencing rule, the final sequence of the patients is _____.

Five jobs are ready for processing at time zero through a workstation. The details of the processing time and the due date of completion is provided in the following table. $\begin{array} { | l | l | l | } \hline \text { Job } & \text { Processing Time (days) } & \text { Due Date } \\\hline \text { A } & 5 & 11 \\\hline \text { B } & 6 & 16 \\\hline \text { C } & 3 & 19 \\\hline \text { D } & 4 & 10 \\\hline \text { E } & 2 & 9 \\\hline\end{array}$ Using the earliest due date (EDD) rule, the average lateness for the five jobs is: