Chapter 8, Problem 38QP

Currently a company that designs Web sites has five customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. The customers are ready to be scheduled today, which is the start of day 190. Question Viewer Time Since Order Arrived Customer (days ago) Processing Time (days) Due Date (days from now) A 3 B 2 C 10 D E 8 6 22228 24 32 58 100 20 26 12 50 66 a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due. Using the FCFS (first come, first served) decision rule for sequencing the customers, the order is: Sequence 1 2 3 4 5 Customer C D E A B Using the EDD (earliest due date) decision rule for sequencing the customers, the order is (to resolve a tie, use the order in which the jobs were received): Sequence 1 2 3 4 5 Customer C D A E B The average flow time and average days past due for each option are: (Enter your responses…

Using the FCFS rule for scheduling, the sequence is Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each of the suits Times Taken for Different Activities (hours) Cut and Sew Suit 1 2 3 7 4 5 Deliver 2 3 6 Assume that orders for suits have been listed in the above table in the order in which they were received. C

A machine center in a job shop for a local fabrication company has five unprocessed jobs remaining at a particular point in time. The jobs are labeled A, B, C, D, and E in the order that they entered the shop. The respective processing times and due dates are given in the table below. What is the sequence the of jobs by CR rules? Job Processing Time Due Date A 10 32 B. 55 34 C. 11 31 60 35

About Assignment Short-Term Scheduling The following table shows the contribution of benefits provided by 5 employees A, B, C, and D in handling 5 types of work I, II, III, IV, and V. Work Employee   A B C D I 10 12 10 8 II 14 10 9 15 III 8 8 7 9 IV 13 15 8 16 V 10 13 14 11 Determine the maximum contribution that can be obtained using the Assignment Models

Using the FCFS rule for scheduling, the sequence is 1-2-3 For the schedule developed using the FCFS rule, the total length of time taken to complete the three suits (including delivery) : hours (enter your response as a whole number). = G Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each of the suits. Times Taken for Different Activities (hours) Cut and Sew 3 5 6 Suit 1 2 7 3 Deliver 4 2 ∞ N 8 Assume that orders for suits have been listed in the above table in the order in which they were received.

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Mike Reynolds has four assignments due in class tomorrow, and his class times are as follows: Time 9 a.m. 11 a.m. 2 p.m. 5:30 p.m. Each class lasts one hour, and Mike has no other classes. It is now midnight, and Mike estimates that the psychology, marketing, OM, and finance assignments will take him four, two, five, and six hours, respectively. Assume that all time till the last class begins can be spent on completing assignments but each assignment should be done till the time of the class on the same subject. (Mike can prepare assignments for the next classes during previous classes.) Use the Excel Sequencing template to determine how he should schedule the work. Use minus sign to enter negative lateness values, if any. Enter the half an hour value as 0.5, e.g., 3:30 p.m. should be entered as 15.5. If your answer is zero, enter "0". Round your answers for the due date, lateness, and tardiness to one decimal place. Round your answers for the average values to two decimal places. EDD…

Now you are being hired as a scheduler in the manufacturing unit of surgical instruments. Your job is to schedule four jobs on the two machines. The job processing time in minutes for the four jobs is given below: A с D Machine 1 Machine 2 3.43 0.11 B 1.58 0.46 3.62 2.29 4.05 4.52 The optimal schedule using Johnson method and makespan for the jobs is: (A)BCBA, 12.79 minutes (B) ABCD, 5.41 minutes (C) DCBA, 12.79 minutes (D) CDBA, 5.41 minutes

Using Johnson's rule for 2-machine scheduling, the sequence is: Scheduled Order 1 2 3 4 5 6 Job For the schedule developed using Johnson's rule, the total length of time taken to complete the six jobs (including the 2nd operation) = hours (enter your response as a whole number). Six jobs are to be processed through a two-step operation. The first operation involves sanding, and the second involves painting. Processing times are as follows: Job A <ש ס ח ר B C E F Operation 1 (hours) 10 36254 Operation 2 (hours) 8° 4 2 7 1 13