Exam 25: Operations Scheduling

A rule that establishes a job's priority based on one piece of information,such as how long it will take to process or when the job arrived,is a(n)________.

Table J.11 Work center Q45 has four jobs that just arrived (the start of Day 1)to be processed,as shown in the following table.Assume the shop works eight hours per day. -Using the information in Table J.11 and the critical ratio rule,what is the flow time of job B?

Consider this list of jobs that have just arrived and are ready for processing.They all require processing first on machine 1 and then on machine 2.Both machines are now idle.Develop a schedule that minimizes makespan and calculate this makespan time.Now assume that each job can be split into two jobs,each having half the duration on both machine 1 and machine 2.Using the original sequence that minimized average flow time,calculate the flow times for all split jobs What is the effect of this new schedule on the average flow time for these split jobs?

Table J.1 The framing department has six jobs waiting to be processed.It is now time zero.Times are expressed in terms of days. -Using the information in Table J.1 and the FCFS rule,what is the average flow time?

________ is a priority sequencing rule that determines priority by dividing the difference between the due date and today's date less the processing time remaining by the number of processing steps left to complete the job.

________ is a procedure that minimizes makespan in scheduling a group of jobs on two workstations.

Table J.7 The following four jobs just arrived (end of hour 0)at Workstation A.They are the only ones waiting to be processed. -Using the information in Table J.7 and the slack per remaining operations (S/RO)rule,what is the job sequence?

Table J.17 A company must take on seven new projects.Each project has a planning stage and a design stage,and the planning stage must be completed before the design stage can begin.Also,two project teams are available to work on these projects: Team 1 works only on planning stages of projects,and Team 2 works only on design stages of projects.The times to complete the project stage,in days,are shown in the following table. -Using the information in Table J.17 and Johnson's rule,what is the sequence of projects that minimizes makespan?

Sometimes referred to as the world champion,the ________ rule is a priority sequencing rule that minimizes the mean flow time and tends to maximize utilization.

The sum of scheduled receipts for all items and the on-hand inventories for all items is ________.

Table J.14 Gable Bakery has five cake orders to be processed today.Each cake has to go through the baking and decorating processes.The baking and decorating times are estimated as follows: -Use the information in Table J.14.In what sequence should the orders be processed to minimize the total processing time?

Table J.1 The framing department has six jobs waiting to be processed.It is now time zero.Times are expressed in terms of days. -Using the information in Table J.1 and the FCFS rule,what is the average past due?

Which one of the following rules tends to perform well with respect to percentage of jobs past due and variance of hours past due,but performs relatively poorly with respect to average flow time?

Stu decides to adopt an SPT sequence for the assignments,which at face value seems like an odd choice.Which assignments will he be submitting late?

A manufacturer's flow shop utilizes line or continuous flow processes.

Slack is the difference between the time remaining until a job's due date and the total shop time remaining,excluding that of the operation being scheduled.

Table J.8 Auto Data produces custom engineering testing equipment.The following six jobs are currently in the design department.The time since each one arrived,the processing time,and the due date are shown below.All times are expressed in terms of days.Let now be the beginning of Day 1. -Using the information in Table J.8 and the EDD rule,what is the average days past due?

Total inventory is the sum of the scheduled receipts for all items and the on-hand inventories for all items.

Stu decides to adopt an EDD sequence for the assignments,which seems like a very logical approach.Which assignments will he be submitting late?

Table J.8 Auto Data produces custom engineering testing equipment.The following six jobs are currently in the design department.The time since each one arrived,the processing time,and the due date are shown below.All times are expressed in terms of days.Let now be the beginning of Day 1. -Using the information in Table J.8 and the SPT rule,what is the average days past due?