(d) Which rule should be used, in your opinion? Why? (e) The head mechanic at the production facility wants to perform maintenance on the bottleneck workstation used to process the jobs above. The mechanic insists the maintenance needs to be performed before day 45, and has indicated that the maintenance will take 3 days to complete and will take the workstation offline. Considering it is still day 13, when is the best time to perform the maintenance? (Hint: Treat the maintenance as though it is a new job.)

(d) Which rule should be used, in your opinion? Why? (e) The head mechanic at the production facility wants to perform maintenance on the bottleneck workstation used to process the jobs above. The mechanic insists the maintenance needs to be performed before day 45, and has indicated that the maintenance will take 3 days to complete and will take the workstation offline. Considering it is still day 13, when is the best time to perform the maintenance? (Hint: Treat the maintenance as though it is a new job.)

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter12: Queueing Models

Section: Chapter Questions

Problem 59P

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At the University Hospital, five blood samples must bescheduled through a blood-testing laboratory. Eachsample goes through up to four different testing stations.The times for each test and the due dates for eachsample are as follows:Sample Test Station/Hours Due Date (hours)1 A/1, B/2, C/3, D/1 62 B/2, C/3, A/1, D/4 103 C/2, A/3, D/1, C/2 84 A/2, D/2, C/3, B/1 145 D/2, C/1, A/2, B/4 12a. Using a Gantt chart, schedule these five samples in priority order of earliest due date first.b. Assume that the capacity of each test station (A, B, C and D) is doubled. Prepare an FCS for this situation.c. What are the bottleneck work centers in part a of the problem. Suggest capacity additions that might be needed.
1. A company has five jobs awaiting processing at a bottleneck work- station in a production facility. The day the job was received, its processing time and due date are given in the following table. It is now the beginning of day 13. Day Job Job was Received Job Processing Job Due Time (days) Day 1 6. 45 8 28 7 23 10 9. 35 12 1 21 Calculate the average throughput time and, for each job, the number of days overdue using the following priority sequencing rules: (a) First-come-first-serve (b) Earliest due date (c) Shortest processing time (d) Which rule should be used, in your opinion? Why? (e) The head mechanic at the production facility wants to perform mainte- nance on the bottleneck workstation used to process the jobs above. The mechanic insists the maintenance needs to be performed before day 45, and has indicated that the maintenance will take 3 days to complete and will take the workstation offline. Considering it is still day 13, when is the best time to perform the maintenance?…
3. Eddie Irwin works in the data processing department at the local medical center. He is required to keep a weekly time card. Please fill out the time card Date Out Sun. Mon. Tues. Wed. Thur. Fri. Sat. 12/13 In 12/14 8:15am 12:30pm 12/15 8:35am 12:50pm 12/16 8:15am 12:10pm 1:15pm 8:30am 12 noon 12/17 8:25am In 12:30pm 1:10pm 1:30pm 12:45pm 1:50pm Out 4:30pm 5:10pm 5:00pm 4:20pm 5:30pm Total Hours>>> Hours
Job Arrived Time Due Date 8. 15 6. 11 22 C 11 8. 6. E 9. 4 9. 16 Using the information in the table and the EDD rule, what is the average days past due? days (Round off to 1 decimal place) 7, 5. 3. 8.
b. The Healthy Food Restaurant, a 24-hour restaurant, faces changing requirements from hour tohour. More workers are needed for peak hours, and fewer are needed in between. The followingTable 6 (below) shows the worker requirement for the first 12 hours in the restaurant:Table 6. Staff Requirement at the Healthy Food RestaurantTime Period 10AM11AM12PM1PM2PM3PM4PM5PM6PM7PM8PM9PMRequirement 8 10 12 12 9 7 6 7 9 10 12 8AssignedOn DutyOverstaffed8(i) You are required to apply the first-hour principle to staff each hour with the required number ofcafeteria staff, showing how many staff are on duty each given hour, the number of staffyou have assigned to work each hour and any overstaffing for each hour. i. Schedule the staff to work in 8-hour shifts.
John's printer works is involved in printing and binding works. The company has got orders from four of its customers: A, B, C, and D at the beginning of work. The processing time and due date of these jobs is given below: rules. Job (In order of Arrival) A B C D L H. 111. IV. V. Processing Time (Days) 3 5 4 2 Develop the order in which these jibs are to be processed by using the following dispatching Earliest Due Date (EDD) Longest Processing Time Shortest Processing time Due date (Days hence) First Come First Serve Slack time Remaining Also calculate the average delay of a job in each case. 4 7 6 5
At the University Hospital, five blood samples must be scheduled through a blood-testing laboratory. Each sample goes through up to four different testing stations. The times for each test and the due dates for each sample are as follows: Sample Test Station/Hours Due Date (hours) 1 A/1, B/2, C/3, D/1 6 2 B/2, C/3, A/1, D/4 10 3 C/2, A/3, D/1, C/2 8 4 A/2, D/2, C/3, B/1 14 5 D/2, C/1, A/2, B/4 12 a. Using a Gantt chart, schedule these five samples; schedule them in priority order of earliest due date first. b. Assume that the capacity of each test station (A, B, C, and D) is doubled. Prepare an FCS for this…
Proctoring Enabled: Chapter 12 Computer Simulati. O Help Save & Exit Submit Saved Given this frequency distribution, what demand values would be associated with the following random numbers? (Do not round intermediate calculations.) Demand Frequency 29 1 23 2. 19 3. 29 Random Number Simulated Demand 0.3 0.5 0.9 Mc Graw Hill < Prev 2 of 5 ASUS
Scenario The KOREAN factory of Hi-Tech Metal, Inc. primarily manufactures plumbing system parts for gas pipes, drainage pipes, water supply pipes and hoses etc. A mainframe computer was used for scheduling, but it took a lot of time and unnecessarily put heavy workload on scheduling managers and on-site workers. Following are the associated problems to meet customers’ needs Lengthy 3 to 4 days schedule drafting time, caused by mainframe computer’s long processing time. Inflexibility of mainframe computer to sudden order changes, leading to tedious manual calculation and direct on-site adjustment Extra workload for on-site workers One-month base scheduling that cannot meet customers’ need, Task 3 Considering above scenario identify the manufacturing system for the components [Based on the stakeholder, strategic goals , explain the manufacturing system]
Scenario The KOREAN factory of Hi-Tech Metal, Inc. primarily manufactures plumbing system parts for gas pipes, drainage pipes, water supply pipes and hoses etc. A mainframe computer was used for scheduling, but it took a lot of time and unnecessarily put heavy workload on scheduling managers and on-site workers. Following are the associated problems to meet customers’ needs Lengthy 3 to 4 days schedule drafting time, caused by mainframe computer’s long processing time. Inflexibility of mainframe computer to sudden order changes, leading to tedious manual calculation and direct on-site adjustment Extra workload for on-site workers One-month base scheduling that cannot meet customers’ need, Task 4 Considering above scenario justify improvements and alternatives to design and manufacturing of plumbing system. [Improvements, alternative systems, explain the IoT systems and Industry4.0 impacts]
Scenario The KOREAN factory of Hi-Tech Metal, Inc. primarily manufactures plumbing system parts for gas pipes, drainage pipes, water supply pipes and hoses etc. A mainframe computer was used for scheduling, but it took a lot of time and unnecessarily put heavy workload on scheduling managers and on-site workers. Following are the associated problems to meet customers’ needs Lengthy 3 to 4 days schedule drafting time, caused by mainframe computer’s long processing time. Inflexibility of mainframe computer to sudden order changes, leading to tedious manual calculation and direct on-site adjustment Extra workload for on-site workers One-month base scheduling that cannot meet customers’ need, Task 1 Considering above scenario Summarize the design process for the finished component [Identify components, explain the utilities and design process (5/7/10 step) for components]
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