OPERATIONS MANAGEMENT W/ CNCT+
12th Edition
ISBN: 9781259574931
Author: Stevenson
Publisher: MCG CUSTOM
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 16, Problem 12P
A shoe repair operation uses a two-step sequence that all jobs in a certain category follow. All jobs can be split in half at both stations. For the group of jobs listed:
a. Find the sequence that will minimize total completion time.
b. Determine the amount of idle time for workstation B.
c. What jobs are candidates for splitting? Why? If they were split, how much would idle time and makespan time be reduced?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The times required to complete each of eight jobs in a two-machine flow shop are shown in thetable that follows. Each job must follow the same sequence, beginning with machine A and moving to machine B.a. Determine a sequence that will minimize makespan time.b. Construct a chart of the resulting sequence, and find machine B’s idle time. c. For the sequence determined in part a, how much would machine B’s idle time be reduced bysplitting the last two jobs in half?TIME (hours)Job Machine A Machine Ba 16 5b 3 13c 9 6d 8 7e 2 14f 12 4g 18 14h 20 11
Eight jobs have arrived in the following order:
Job Processing Time Due Date
1
25
11
12
9
2
3
4
5
6
7
8
9
5
11
st
4
10
7
16
6
18
16
Find and compare the performance measures for the following sequencing rules using the Excel Sequencing template.
Round your answers to two decimal places.
A. Process in the order they have arrived
24
42
Average
Flow Time Lateness Tardiness
Average
B. Shortest processing time
The SPT sequence is 4, 2, 8, 6, 1, 5, 3, 7
Flow Time Lateness Tardiness
Average
Earliest due date
The EDD sequence is 4, 2, 3, 8, 5, 6, 1, 7
Flow Time Lateness Tardiness
A group of six jobs is to be processed through a two-machine flow shop. The first operation involves cleaning and the second involves painting. Determine a sequence that willminimize the total completion time for this group of jobs. Processing times are as follows:PROCESSING TIME (hours)Job Work Center 1 Work Center 2A 5 5B 4 3C 8 9D 2 7E 6 8F 12 15 To employ Johnson’s rule, create a “blank” sequence first, such as:mhhe.com/stevenson13eEXAMPLE 41st 2nd 3rd 4th 5th 6th
Chapter 16 Solutions
OPERATIONS MANAGEMENT W/ CNCT+
Ch. 16 - Why is scheduling fairly simple for repetitive...Ch. 16 - Prob. 2DRQCh. 16 - What are Gantt charts? How are they used in...Ch. 16 - Prob. 4DRQCh. 16 - Briefly describe each of these priority rules: a....Ch. 16 - Why are priority rules needed?Ch. 16 - What problems not generally found in manufacturing...Ch. 16 - Explain forward and backward schedulings and each...Ch. 16 - Prob. 9DRQCh. 16 - Prob. 10DRQ
Ch. 16 - Prob. 11DRQCh. 16 - What general trade-offs are involved in sequencing...Ch. 16 - Prob. 2TSCh. 16 - Prob. 3TSCh. 16 - One approach that can be effective in reducing the...Ch. 16 - Doctors and dentists offices frequently schedule...Ch. 16 - Prob. 3CTECh. 16 - Use the assignment method to determine the best...Ch. 16 - Rework Problem 1, treating the numbers in the...Ch. 16 - Assign trucks to delivery routes so that total...Ch. 16 - Develop an assignment plan that will minimize...Ch. 16 - Use the assignment method to obtain a plan that...Ch. 16 - The following table contains information...Ch. 16 - Using the information presented in the following...Ch. 16 - The following table shows orders to be processed...Ch. 16 - A wholesale grocery distribution center uses a...Ch. 16 - The times required to complete each of eight jobs...Ch. 16 - Prob. 11PCh. 16 - A shoe repair operation uses a two-step sequence...Ch. 16 - The following schedule was prepared by the...Ch. 16 - The production manager must determine the...Ch. 16 - A foreman has determined processing times at a...Ch. 16 - Given the information in the following table,...Ch. 16 - Given the following information on job times and...Ch. 16 - Prob. 18PCh. 16 - The following table contains order-dependent setup...Ch. 16 - The following table contains order-dependent setup...Ch. 16 - Prob. 21PCh. 16 - Given this information on planned and actual...Ch. 16 - Given the following data on inputs and outputs at...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Prob. 1CQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- In an evaluation of labor assignment rules when workers are not perfectly interchangeable, Paul. M. Bobrowski and Paul Sungchil Park created a dynamic job shop with 9 work centers and 9 workers, both numbered 1–9. The efficiency of each worker is specified in the following labor efficiency matrix, which represents the degree of worker cross-training.† Work Centers 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00 W o r k e r s (a) For what work center(s) is worker 2 least efficient? (Enter your answers as a comma-separated list.) (b) For what…arrow_forwardThe day when the order arrived, processing time, and promised due dates are given in the following table. The jobs are listed in the order of arrival. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average past due days. Make a comment.arrow_forwardEight jobs have arrived in the following order: Job Processing Time Due Date 1 7 23 2 3 9 3 5 8 4 2 11 5 6 16 6 9 18 7 14 40 8 4 31 Find and compare the performance measures for the following sequencing rules using the Excel Sequencing template. Round your answers to two decimal places. Process in the order they have arrived Flow Time Lateness Tardiness Averagearrow_forward
- If the cycle time is 65.4 seconds and A is assigned as the first task in Workstation #1, what is the idle time after assigning task A? Task Task Time (seconds) Tasks That Must Precede Other Tasks Number of Following Tasks A 28 - 7 B 13 - 8 C 35 B 7 D 11 A 6 E 20 C 6 F 6 D, E 5 G 23 F 3 H 25 F 2 I 37 G 1 J 11 G, H 1 K 27 I, J 0 Total 236 a. 26.9 minutes b. 37.4 seconds c. 28.5 seconds d. 31.6 seconds e. 57.6 secondsarrow_forwardThere are six jobs as below. The processing time (in days) and due date for each job are below. Job lamolam A B C D E F (a) the average flow time Processing Time (days) (b) average tardiness 1 16 4 10 5 8 Due Date (days from present time) Please use SPT (shortest processing time) priority rule to calculate: 7 16 4 15 10 18 (c) average number of jobs at the work center, for each of these rules:arrow_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
- WorkPro is a small manufacturer. It uses a job process for production. The following sample of jobs are listed in the order that they were received. Job Due Date Operation Time P 5 1 Q 20 8 R 8 5 S 11 6 T 3 12 When the shortest operating time (SOT) rule is applied to the sample of jobs, the resulting sequence is: A. Choos the following answer choice. T, P, R, S, Q R, S, T, P, Q P, Q, R, S, T P, R, S, Q, T B. In the WorkPro example above, average flow time for the sample of jobs when sequenced by the shortest operating time (SOT) rule is approximately: 19.8 14.2 4.8 6.4 C. In the WorkPro example above, average lateness for the sample of jobs when sequenced by the earliest due date (EDD) rule is approximately: Group of answer choices 10.4 4.8 7.8 5.8 D. Using the sample of jobs in the WorkPro example above, the shortest operating time (SOT) rule appears more attractive than the earliest due date (EDD) rule…arrow_forwardplease solve complete in 1 hour i will give you upvotearrow_forwardHow is the scheduling of patients in a doctor’s clinic similar to and different from the scheduling of jobs in a factory?arrow_forward
- Given the following information on job times and due dates, determine the optimal processingsequence using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. For each method, find the average jobflow time and the average job tardiness. Jobs are listed in order of arrival.JobJob Time(hours)Due Date(hours)a 3.5 7b 2.0 6c 4.5 18d 5.0 22e 2.5 4f 6.0 20arrow_forwardUse Johnson's rule to obtain the optimum sequence of jobprocessing for the following jobs through a two-machine flow shop. Each jobmust follow the sequence of job processing Machine - 1 first, followed byMachine - 2 . All job times listed are in hours. (In Excel with formulas)Job Machine-1 Machine-2A 2.8 4.5B 4 1.7C 2.5 3.3D 5.5 3.7E 4 1.50arrow_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
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
Operations ManagementOperations ManagementISBN:9781259667473Author:William J StevensonPublisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...Operations ManagementISBN:9781259666100Author:F. Robert Jacobs, Richard B ChasePublisher:McGraw-Hill Education
Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage Learning
Production and Operations Analysis, Seventh Editi...Operations ManagementISBN:9781478623069Author:Steven Nahmias, Tava Lennon OlsenPublisher:Waveland Press, Inc.
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Operations Management
Operations Management
ISBN:9781259667473
Author:William J Stevenson
Publisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...
Operations Management
ISBN:9781259666100
Author:F. Robert Jacobs, Richard B Chase
Publisher:McGraw-Hill Education
Purchasing and Supply Chain Management
Operations Management
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Cengage Learning
Production and Operations Analysis, Seventh Editi...
Operations Management
ISBN:9781478623069
Author:Steven Nahmias, Tava Lennon Olsen
Publisher:Waveland Press, Inc.
Inventory Management | Concepts, Examples and Solved Problems; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=2n9NLZTIlz8;License: Standard YouTube License, CC-BY