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Exam 15: Scheduling

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Question 61

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Seven jobs must be scheduled.Each of the jobs must be processed on two machines (A and B) in the same order.The processing times are listed below.According to Johnson's rule,in what order should the jobs be processed?

A) A-E-C-G-D-B-F
B) A-C-E-G-D-B-F
C) F-B-D-G-C-E-A
D) F-D-B-G-E-C-A
E) G-D-B-F-A-E-C

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

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Question 62

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What are the three steps for the Johnson's Rule?

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Step 1 - List jobs and processing time f...

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Question 63

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What does makespan measure?

Using the Tibrewala,Phillippe,and Brown technique for a Monday through Sunday work week a regular,full time employee can end up with a Sunday-Monday set of days off.

Which of the following is a measure of how long after the due date the job is completed?

Jackie is the owner and the manager of an auto repair company.In order to be fair to all the customers,Jackie decides to use the FCFS priority rule in job sequencing.Currently,four cars need to be repaired.Assume that the cars arrive in the order listed,that is,A first,then B,then C,then D.The estimated labor times (in days)and promise dates are shown in the following table.Customers usually do not pick up their cars early.Today is day 0. Based on the FCFS sequence,calculate the following performance measures: (a)makespan,(b)average job flow time,(c)average number of jobs in the system,(d)average job tardiness.

The following jobs are waiting to be scheduled.Today is day 9.Determine the sequence of jobs by using EDD as a priority rule.

A local priority rule sets priority based only on the jobs waiting at that individual work center.

Which of the following statements is not true?

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

Flow operations are often related to high volume production.

Discuss how companies can benefit from both infinite and finite loading.

Only Roses Flower Shop currently operates 7 days per week.The staffing needs for each day are shown in the following table.Each of the employees must have two consecutive days off in a week.(Since Monday is used as the first day of the pay week,an employee cannot be off on both Sunday and Monday.) What is the minimum number of employees that needs to be hired?

The following jobs must be processed in the Super Clean motor shop.Assume that the company operates seven days per week.Using FCFS as the priority rule,calculate average job tardiness.

Green Inc.manufactures a variety of wooden desks.Five jobs are waiting to be processed using the LPT priority rule.Their processing times are shown in the following table.What is the makespan?

A progress chart shows the relationship between:

Which of the following scheduling techniques determines the earliest possible completion time for a job?

Which of the following sequencing rules is used for minimizing makespan in a two-stage,unidirectional process?

Operational schedules that consider work center capacity use ________________.

Six jobs are to be processed through a two-stage operation.The first operation involves drill pressing,and the second involves lathing.Process times are as follows Determine a sequence that will minimize the total completion time for these jobs.