Exam 17: Supplement J Operations Scheduling

________ is a priority sequencing rule that specifies that the job that arrived at the workstation first is given the highest priority.

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?

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.5 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.5. The operations sequence of jobs, using the critical ratio (CR) rule, is

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?

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 shortest processing time (SPT) rule, what should be the sequence of jobs processed at Q45?

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?

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.15 Consider the following problem in which four jobs that arrived this morning are to be processed on two machines. They start with the cutting machine and then go to the painting machine. The following processing times are available (in hours): -Use the information in Table J.15. If the SPT rule is used to determine the sequence at the cutting machine and the same sequence is also used at the painting machine, what is the makespan through both machines?

________ 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.

A job shop is accompanied by divergent flows and low-to-medium volume output rates.

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 ratio (S/RO) rule, what is the average past due?

Johnson's rule is a procedure that minimizes makespan in scheduling a group of jobs on two workstations.

A(n) ________ specializes in medium- to high-volume production and uses line or continuous flow processes.

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?

Which of the following statements on an operations schedule is best?

Table J.18 -Use the information in Table J.18 and sequence the jobs using the SPT rule. What is the average flow time?

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?

________ specify the job processing sequence when several jobs are waiting in line at a workstation.

An example of a labor-assignment rule would be to assign personnel to the workstation with the job that has the earliest due date.