Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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There are 6 jobs which go through two machines A and B in the order A-B. Processing time in hours) is given here. Determine the optimal sequence of processing the jobs and total minimum elapsed time. Find the idle time on machine B.
Job
1
2
3
5
6
Machine A
8
10
11
12
16
20
Machine B
7
15
10
14
13
9
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- The following jobs are waiting to be processed atJeremy LaMontagne’s machine center. Today is day 250. Using the critical ratio scheduling rule, in what sequencewould the jobs be processed?arrow_forwardA new surgical facility called Cut & Sew has opened in the United States. The branches of the facility are spread throughout the country. These are job shops that handle a variety of outpatient surgical procedures. The process of the facility is set up in a way that one doctor will cut and another will sew. The data regarding the patients and the estimated time for cutting and sewing for each patient are given in the following table: Patient A Cut Time (hours) 2.3 2.5 Sew Time (hours) 2.8 3.0 1.5 1.0 2.8 IB 2.0 0.6 3.8 If we apply the following sequence B-C-D-A-E, the makespan is place). Type your precise answer (one decimal Your Answer: Answerarrow_forwardFive jobs are ready for processing at time zero through a workstation. The details of the processing time and the due date of completion is provided in the following table. Job A B Processing Time (days) I5 Due Date 11 6 3 16 19 10 D E 15 Using the earliest due date (EDD) rule, the average lateness for the five jobs is decimal place. Round your answer to one Your Answer: Answerarrow_forward
- 2. A small restaurant is creating a schedule for its wait staff to meet its expected weekly demand. The staff requirements have been determined to be: day monday tuesday wednesday thursday friday saturday sunday 1 staff 3. 3. The restaurant would like its staff to have two consecutive days off, with a preference given to Saturday and Sunday, or one of those two days if the pair is not possible. (a) Create a schedule to meet the staff requirements. How many wait staff are needed? (b) The restaurant believes regular maintenance of the kitchen is important. The kitchen staff would like 1 extra worker whenever they perform main- tenance. On which days of the week should maintenance be scheduled? (c) The restaurant wants to create a 'kid's day' (young children eat for free) to attract customers on days with low demand. Given your staff schedule, which day is best to implement this promotion.arrow_forwardFind the value of X in the following Flow Shop data consisting of 5 jobs which are to be processed on two machines M1 & M2 in that order. M2 Jobs A 7 B 5 C D E M1 5 2 1 4 13 3 6 3 For the sequence using Johnson's Rule, the Average Flow Time Xarrow_forwardAs the Cottrell Bicycle Co. of St. Louis completes plans for its new assembly line, it identifies 25 different tasksin the production process. VP of Operations Jonathan Cottrell now faces the job of balancing the line. He lists precedencesand provides time estimates for each step based on work-sampling techniques. His goal is to produce 1,000 bicycles perstandard 40-hour workweek.Balance this operation using the shortest operation time rule and compute the efficiency of the line.arrow_forward
- A work cell in a local manufacturer has a workstation with 4 machines that form a line (Machine 1-Machine 2-Machine 3-Machine 4). Each unit needs to pass through each machine in order to be completed. Each machine has a production capacity of four units per hour. What is the process time of the work cell in minutes per unit? 15 4 8 16arrow_forwardFive jobs are planned to be scheduled. Each of the jobs must be processed on three machines (A, B, and C) in the same order. The processing times are listed below. Use Johnson's Rule to determine the optimal sequence of jobs. Job B 16 10 11 10 14 20 12 3 10 8 4 1 O a) 3-1-2-4-5 O b) Johnson's Rule is not an Optimal Technique O c) 1-2-3-4-5 O d) 5-4-3-1-2 O e) 5-4-3-2-1 O) 5-4-2-1-3 O e) 5-4-2-3-1 2345arrow_forwardGiven the projects displayed in Table 18.21, if SPT is used to sequence the jobs, what isthe average flow time of the projects (in hours)?arrow_forward
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