OM (with OM Online, 1 term (6 months) Printed Access Card)
6th Edition
ISBN: 9781305664791
Author: David Alan Collier, James R. Evans
Publisher: Cengage Learning
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Chapter 14, Problem 12PA
Summary Introduction
Interpretation:A minimum make span scheduleis to be developed by applying the J’s rule.
Concept Introduction:The time required to process a given set of jobs is referred to as the makespan.
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The following 5 overhaul jobs are waiting to be processed at Avianic's Engine Repair Inc. These jobs were logged
as they arrived. All dates are specified as planning calendar days.
Calculate the Critical Ratios (CR): (Enter all responses rounded to two decimal places.)
Job
CR
Job
Due Date
Duration (days)
103
103
214
10
205
205
223
309
309
217
11
412
219
412
517
216
15
517
Assume that all jobs arrived on day 180; today's date is 200.
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?
Five customers brought in computers to be repaired to a small shop. Estimated repair times (in days) and dates promised are given below. Due dates were set based on available technicians; however, one technician had a medical emergency and will be
unavailable for at least two weeks so processing times were adjusted.
Customer job 1
Processing time
(days)
Due date (days)
6
Use the EDD rule and compute the start time, flow time, lateness, and tardiness for each job. Use minus sign to enter negative lateness values, if any. If your answer is zero, enter "0".
Sequence Start Time, days Flow Time, days Lateness, days
Tardiness, days
-Select-
-Select-
-Sclect.
-Select-
-Select-
UI
5
LI
TE
10
MA
Chapter 14 Solutions
OM (with OM Online, 1 term (6 months) Printed Access Card)
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