Exam 26: Operations Scheduling

Table J.3 Six jobs have just arrived at workstation 017;which has been idle.All the pertinent data are given in the following table.The shop works eight hours per day.It is now time zero. -Use the information in Table J.3.If the EDD rule is used,what is the average past due?

Table J.3 Six jobs have just arrived at workstation 017;which has been idle.All the pertinent data are given in the following table.The shop works eight hours per day.It is now time zero. -Use the information in Table J.3.If the SPT rule is used,what is the average past due?

A job's flow time at a single workstation is defined as the:

Table J.4 Workstation 1 has five jobs waiting to be processed.It is now time 0,and times are expressed in terms of days.All pertinent data are given in the following table. -Using the information in Table J.4 and the EDD rule,what is the average flow time (in days)?

Table J.16 Five jobs are currently waiting to be processed.Each job has to go through Machine 1 first and then Machine 2 before it is completed.The processing times (in hours)for the five jobs on each machine are: -Use the information in Table J.16.What is the makespan through both machines if Johnson's rule is used?

Table J.12 Consider the following problems in which six jobs must each be processed on two machines starting with machine 1 and then going to machine 2.The following processing times and due dates are in hours. -Use the information in Table J.12.What sequence would you use if you wanted to minimize the makespan of the jobs?

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 last one completed if sequencing is done using the FCFS rule?

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?

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,develop a schedule that minimizes makespan for these seven jobs.Assume that job C could be neatly split into two equal parts,each having half of the processing time on each machine as the full job C.Using your original sequence,but splitting job C,what is the reduction in makespan for the seven jobs?

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 critical ratio (CR)rule,what is the job sequence?

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 FCFS rule,what is the average days past due?

Determining a production sequence for a group of jobs in a two-station flow shop to minimize the makespan has the advantage of:

Table J.12 Consider the following problems in which six jobs must each be processed on two machines starting with machine 1 and then going to machine 2.The following processing times and due dates are in hours. -Use the information in Table J.12.What is the minimum idle time possible on machine 2?

Describe the difference between front office and back office operations from the standpoint of scheduling customer jobs.

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

Table J.4 Workstation 1 has five jobs waiting to be processed.It is now time 0,and times are expressed in terms of days.All pertinent data are given in the following table. -Using the information in Table J.4 and the EDD rule,what is the average days past due?

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 EDD rule,what is the average flow time?

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

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 makespan for these seven jobs?

Table J.10 A workstation has six jobs waiting to be processed.They arrived at the end of Day 0 and it is now the beginning of Day 1.It is now time zero.Times are expressed in terms of days. -Using the information in Table J.10 and the earliest due date (EDD)rule,which job(s)will be completed on or before their due dates?