Exam 26: Operations Scheduling

Table J.9 There are three jobs available for processing at Workstation 1.They just arrived at Workstation 1,at the end of Day 0. -Using the information in Table J.9 and the slack per remaining operations (S/RO)rule,what should be the sequence of jobs processed at Workstation 1?

Table J.6 All of the following three jobs just arrived (end of hour 0)at Workstation A.They are the only ones waiting to be processed. -Use the information in Table J.6.What is the average past due time at Workstation A for the critical ratio rule?

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

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 CR rule,what is the average flow time at workstation A?

A first-come,first-served schedule minimizes the average flow time for all jobs.

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?

Operations scheduling involves assigning jobs to workstations or employees to jobs for specific time periods.

Makespan is the time of completion of a group of jobs,plus the starting time of the first job.

What are multiple-dimension scheduling rules? Provide examples and discuss how each rule performs.

Table J.6 All of the following three jobs just arrived (end of hour 0)at Workstation A.They are the only ones waiting to be processed. -Use the information in Table J.6.What is the average flow time at Workstation A for the critical ratio rule?

Table J.2 Suppose that the following six jobs must be scheduled through a car repair facility: -Use the information in Table J.2.Which one of the following jobs will be the first one completed if sequencing is done using the SPT rule?

Use the information in the table and sequence the six jobs using SPT and EDD.Calculate the average flow times and average lateness.All jobs arrived at time zero and are ready at time zero.

Operations scheduling applies only to manufacturing,because services do not allow inventories.

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 slack per remaining operations (S/RO)rule,what should be the sequence of jobs processed at Q45?

Use the information in the table and sequence the six jobs using the critical ratio algorithm.Calculate the average flow times and average lateness.All jobs arrived at time zero and are ready at time zero.

Use the information in the table and sequence the six jobs using the slack per remaining operation algorithm.Calculate the average flow times and average lateness.All jobs arrived at time zero and are ready at time zero.

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 either the FCFS,SPT or EDD rule,what is the fewest number of late jobs possible?

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?

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?

Makespan is the total amount of time to complete a single job or the first job in a group of jobs.