Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 18, Problem 13PA
Summary Introduction
To determine: The tardiness of Job E.
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24
The job that arrived first at a work center or machine will be processed first and completed. Which of the following priority rules does this statement represent?
a
first come, first served
b
shortest processing time
c
critical ratio
d
earliest due date
An organization faces heavy penalties for jobs that are not completed on time. Which of the following priority rules should the operations manager use when sequencing jobs?
A.EDD: earliest due date
B.SPT: shortest processing time
C.LPT: longest processing time
D.FCFS: first come, first served
If the jobs displayed in Table 18.23 are processed using the earliest-due-date rule, whatis the maximum tardiness?
Chapter 18 Solutions
Operations Management
Ch. 18 - Prob. 1CQCh. 18 - Prob. 2CQCh. 18 - Prob. 3CQCh. 18 - Prob. 4CQCh. 18 - Prob. 5CQCh. 18 - Prob. 6CQCh. 18 - With weighted shortest processing time, jobs are...Ch. 18 - Prob. 8CQCh. 18 - Prob. 9CQCh. 18 - Prob. 10CQ
Ch. 18 - Prob. 11CQCh. 18 - Prob. 12CQCh. 18 - Prob. 13CQCh. 18 - Prob. 14CQCh. 18 - Prob. 15CQCh. 18 - Prob. 16CQCh. 18 - Prob. 1PACh. 18 - Prob. 2PACh. 18 - Prob. 3PACh. 18 - Prob. 4PACh. 18 - Prob. 5PACh. 18 - Prob. 6PACh. 18 - Prob. 7PACh. 18 - Prob. 8PACh. 18 - Prob. 9PACh. 18 - Prob. 10PACh. 18 - Prob. 11PACh. 18 - Prob. 12PACh. 18 - Prob. 13PACh. 18 - Prob. 14PACh. 18 - Prob. 15PACh. 18 - Prob. 1CCh. 18 - Prob. 2CCh. 18 - Prob. 3CCh. 18 - Prob. 4C
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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
- If the jobs displayed in Table 18.23 are processed using the earliest-due-date rule, whatis the average flow time?arrow_forwardThe Earliest Due date (EDD) rule for sequencing a given set of jobs usually ____________ Select one: a. minimizes the maximum lateness and tardiness. b. minimizes average flow time and work in process inventory. c. maximizes the average lateness and tardiness. d. minimizes the average lateness and tardiness. e. maximizes the minimum lateness and tardiness.arrow_forwardIn the winter, Scott works four 10-hour days instead of five 8-hour days, so he has a long weekend every week. In this way, Scott takes advantage of a ________. Question 38 options: A) shared work week B) flextime work week C) new-age work week D) compressed work week E) enriched work weekarrow_forward
- Why does the theory of constraints advocate that a manager’s attention be directed tothe bottleneck of a process?a. It is useful to lower the utilization of the bottleneck.b. The bottleneck has considerable influence on the average flow rate of a process.c. It is important to minimize the buffer inventory in front of the bottleneck.d. First-come-first-served scheduling of jobs at the bottleneck ensures that all jobs havethe same expected waiting time before they are processed at the bottleneck.arrow_forwardRaquel is concerned with effi ciency. She believes it isprobably more effi cient to use SPT (shortest processing time) asher priority rule.(a) Develop a sequence using SPT based on processing timefor preparing the area.(b) Calculate the makespan, the mean job fl ow time, and theaverage number of jobs in the system.arrow_forwardFive jobs are waiting for processing through two work centers. Their processing time (in minutes) at each work center is contained in the table below. Each job requires work center Sigma before work center Delta. According to Johnson's rule, what sequence of jobs will minimize the completion time for all jobs? Job Sigma Delta R 20 10 S 25 30 T 30 20 U 35 35 V 15 25 Part 2 A. V−S−U−T−R B. V−R−U−S−T C. R−V−T−S−U D. S−U−T−V−R E. R−S−T−U−Varrow_forward
- If the jobs displayed in Table 18.23 are processed using the earliest-due-date rule, whatwould be the tardiness of job E?arrow_forwardThe following jobs are waiting to be processed at Jeremy LaMontagne's machine center. Today is day 250. Using the critical ratio scheduling rule, in what sequence would the jobs be processed?arrow_forwardIf the jobs displayed in Table 18.20 are processed using the earliest-due-date rule, whatwould be the tardiness of job D?arrow_forward
- Lee is the manager of the ABC construction project. Lee is informed by the foreman that the concrete will need to cure for one more day before the framing can start. Lee should add which time to the framing activity to accommodate the requirement? Group of answer choices Lag Delay Slack Leadarrow_forwardA key part of work center scheduling is job sequencing—deciding in what order jobs are scheduled to start/complete. What is the term for the simple rules used to aid this process using a single piece of data about the jobs?arrow_forwardCurrently a company that designs Web sites has six customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. Job Time Since Order Arrived (days ago) Processing Time (days) Due Date (days from now) A 6 18 48 B 4 22 52 C 1 30 70 D 10 14 28 E 7 12 56 F 5 20 62 Develop a schedule by using the first-come, first-served (FCFS) rule and calculate the average flow time and average days past due for the schedule. Develop a schedule by using the earliest due date (EDD) rule and calculate the average flow time and average days past due for the schedule. Comment on the performance of the FCFS and EDD rules relative to average flow time and average days past due.arrow_forward
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