Exam 26: Operations Scheduling

Table J.13 Professor Gable and his graduate assistant are grading student term papers.The graduate assistant must first make a general evaluation and then Professor Gable makes the final grade evaluation.There are four term papers to evaluate: W,X,Y,and Z.Because the length and content differ,each paper will differ in evaluation time.The times,in hours,are estimated to be: -Use the information in Table J.13.What is the sequence in which the papers will be graded if the professor and graduate assistant wish to minimize the total grading time?

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

Sequencing jobs does not affect tardiness,because processing times are unchanged with different sequences.

Lee Beedo,a hip bachelor in Edmond,has a date for Saturday night and finds himself without a thing to wear.Faced with the daunting task of doing enough laundry to fully accessorize during his night out,Lee has sorted his clothes into loads according to fabric and color.Based on his vast experience doing laundry,Lee knows how long each load will take in both the washer and the dryer.He glances at his watch;it is now 2:00 p.m.and he has to have the last load dry by 8:30 p.m.to be there in time.Help Lee develop a schedule that will enable him to make his date on time and depict that schedule using a Gantt chart.Can he make it and,if so,by how much?

Table J.2 Suppose that the following six jobs must be scheduled through a car repair facility: -Use the information in Table J.2.What is the past due time of the last job completed if sequencing is done using the earliest due date rule?

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?

Why is flow time an important measure of performance?

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

________ is the degree to which equipment,space,or the workforce is currently being used.

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

________ is a priority sequencing rule that specifies that the job that has the earliest due date is the next job to be processed.