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Exam 16: Scheduling

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Question 71

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Which of the following is not an example of a high-volume system?

A) aircraft manufacturing
B) magazine printing
C) petroleum refining
D) waste treatment
E) commercial donut baking

F) B) and E)
G) A) and D)

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Question 72

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What is the optimum job sequence for the jobs listed below using Johnson's rule? $\begin{array}{l}\text { Processing time (hrs) }\\\begin{array} { c c c } \text { Job } & \text { Center 1 } & \text { Center 2 } \\\hline \mathrm { d } & 13 & 23 \\\mathrm { e } & 23 & 13 \\\mathrm { f } & 16 & 18 \\\mathrm {~g} & 20 & 17\end{array}\end{array}$

A) e-g-f-d
B) d-g-f-e
C) d-f-g-e
D) e-d-f-g
E) f-e-d-g

F) B) and E)
G) C) and D)

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Question 73

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The following table contains information about five jobs waiting to be processed at work center number three. $\begin{array} { l c c } \text { Job } & \begin{array} { c } \text { Processing } \\\text { Time (hrs) }\end{array} & \begin{array} { c } \text { Hours Until } \\\text { Due }\end{array} \\\hline \mathrm { a } & 14 & 15 \\\mathrm {~b} & 10 & 20 \\\mathrm { c } & 18 & 18 \\\mathrm {~d} & 2 & 16 \\\mathrm { e } & 4 & 21\end{array}$ The sequence that would result using the SPT rule is:

The president of a consulting firm wants to minimize the total number of hours it will take to complete four projects for a new client. Accordingly, she has estimated the time it should take for each of her top consultants-Charlie, Betty, Johnny, and Rick-to complete any of the four projects, as follows: $\begin{array} { c } \quad \quad \quad \quad \quad { \text { Project (Hours) } } \\\begin{array} { l c c c c } \text { Consultant } & \text { A } & \text { B } & \text { C } & \text { D } \\\hline \text { Charlie } & 13 & 16 & 11 & 13 \\\text { Betty } & 11 & 15 & 14 & 18 \\\text { Johnny } & 15 & 22 & 12 & 15 \\\text { Rick } & 17 & 17 & 12 & 22\end{array}\end{array}$ For the optimal schedule, what is the total number of hours it will take these consultants to complete these projects?

Scheduling in service systems often takes the form of: (I) appointment systems. (II) reservation systems. (III) makespan systems.

Given the following data for jobs awaiting processing at a manufacturing cell in which jobs are first processed by machine A, then by machine B: $\begin{array} { c } \quad\quad\quad{ \text { Process Time (Hours) } } \\\begin{array} { l c c } \text { Job } & \text { Center A } & \text { Center B } \\\hline \mathrm { W } & 4 & 5 \\\mathrm { X } & 6 & 6 \\\mathrm { Y } & 1 & 2 \\\mathrm { Z } & 5 & 2\end{array}\end{array}$ What is the sequence which will minimize throughput time?

Infinite loading and finite loading are two major approaches used to load work centers.

Given the following data for jobs awaiting processing at a manufacturing cell in which jobs are first processed by machine A, then by machine B: $\begin{array} { c } \quad\quad\quad{ \text { Process Time (Hours) } } \\\begin{array} { l c c } \text { Job } & \text { Center A } & \text { Center B } \\\hline \mathrm { W } & 4 & 5 \\\mathrm { X } & 6 & 6 \\\mathrm { Y } & 1 & 2 \\\mathrm { Z } & 5 & 2\end{array}\end{array}$ What is the throughput time for the optimum schedule?

In an assignment model where there are fewer jobs than resources:

Eva, the owner of Eva's Second Time Around Wedding Dresses, currently has five dresses to be altered, shown in the order in which they arrived: $\begin{array} { l c c } \text { Job } & \begin{array} { c } \text { Processing } \\\text { Time (hrs) }\end{array} & \begin{array} { c } \text { Due } \\\text { (hrs from now) }\end{array} \\\hline \mathrm { V } & 3 & 5 \\\mathrm {~W} & 1 & 1 \\\mathrm { X } & 4 & 9 \\\mathrm { Y } & 2 & 3 \\\mathrm { Z } & 5 & 7\end{array}$ If Eva uses the earliest due date first (EDD) priority rule to schedule these jobs, what will be the average job tardiness?

Which of the following is the last step in the capacity/scheduling chain?

Given the following data for jobs awaiting processing at a manufacturing cell in which jobs are first processed by machine A, then by machine B: $\begin{array} { c } \quad\quad\quad{ \text { Process Time (Hours) } } \\\begin{array} { l c c } \text { Job } & \text { Center A } & \text { Center B } \\\hline \mathrm { W } & 4 & 5 \\\mathrm { X } & 6 & 6 \\\mathrm { Y } & 1 & 2 \\\mathrm { Z } & 5 & 2\end{array}\end{array}$ In developing the sequence that will minimize throughput time, where in the schedule sequence should job W be placed?

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

In a task assignment situation, in how many different ways can five jobs be assigned to five machines?