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Exam 16: Scheduling

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Question 61

Multiple Choice

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Job X arrived at work center Q at noon.At 2 p.m.that same day X was begun.X left work center Q at 3:15 p.m.that same day.X's flow time, in minutes, was __________.

A) 195
B) 120
C) 75
D) 60
E) Cannot be determined

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

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Question 62

True/False

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Priority rules are widely used to sequence jobs in high-volume systems.

A) True
B) False

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Question 63

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Bottlenecks may shift with the passage of time, so that different operations become bottleneck operations at different times.

The matrix below shows relative costs for various job-machine combinations.Which set of pairs constitutes the minimum-cost solution using the Assignment method?

For the optimal schedule, what is the total number of hours required to complete these jobs?

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

What is the sequence which will minimize throughput time?

Where in the optimum sequence should car E be scheduled?

Can an optimum assignment be made after the row and column reductions?

A manager must assign four engineers to projects, one to a project.The leader of Project C has indicated that he does not want engineer 2 or 3 on his project.Given the cost figures below for each project-engineer combination, and keeping in mind that two combinations are undesirable, determine assignments such that total cost will be minimized.

Can an optimum assignment be made after the first modification of the row and column reductions table?

The SPT rule minimizes idle time for subsequent operations.

What is the idle time at machine B for the optimum schedule?

In an assignment method problem, if it takes Abe 3 hours to build a birdhouse and 4 hours for a doghouse, while Betty takes 4 hours for a birdhouse and 3 hours for a doghouse, what is the reduced cost (in hours) of assigning Abe to build the doghouse?

What is the optimum job sequence for the jobs listed below using Johnson's Rule?

The purpose of cyclical scheduling is to:

If he uses the shortest processing time first (SPT) priority rule to schedule these jobs, what will be the average number of jobs in his shop today?

What is the average completion time for the shortest processing time (SPT) priority rule? Average job tardiness? Average number of jobs at the center?

Using the cost information given in the table below, assign work crews to jobs so that total cost is minimized.

In a single work center, makespan improvement can be accomplished by selecting the optimal sequencing rule.