Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 14, Problem 22P
Summary Introduction
Interpretation:
Tardiness for Job B.
Concept Introduction:
The length of time a job spends in the system is referred to as “flow time”.
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Students have asked these similar questions
Using the FCFS rule for scheduling, the sequence is 1-2-3
For the schedule developed using the FCFS rule, the total length of time taken to
complete the three suits (including delivery) : hours (enter your response as a
whole number).
=
G
Sunny Park Tailors has been asked to make three different types of wedding suits
for separate customers. The table below highlights the time taken in hours for
cutting and sewing (process 1) and delivery (process 2) of each of the suits.
Times Taken for Different Activities (hours)
Cut and Sew
3
5
6
Suit
1
2
7
3
Deliver
4
2
∞ N
8
Assume that orders for suits have been listed in the above table in the order in
which they were received.
De Law Construction has a gotten some construction jobs to build some starter housing units in a few areas. The building time for each housing unit to be completed as well as the date that each unit is to be completed is shown in the table below. Today is Day 471. Which of the sequences, EDD OR SPT should the company use to sequence the order in which they do the jobs, assuming that because of resource constraints it cannot do the jobs simultaneously?
HOUSING UNIT
Building Time (days)
Due Date
Marabella
39
Day 502
Tabaquite
23
Day 528
San Juan
30
Day 515
Mayaro
33
Day 498
D’Abadie
41
Day 535
Preysal
40
Day 510
Some time after starting the jobs according to the sequence you decided on, it was found that because of inclement weather the last three housing units in the sequence have been delayed. You now have to prioritise and decide in which order to expedite those three jobs, using the Critical Ratio model. It is now…
The following jobs are waiting to be processed at Rick Solano’s machine center. Solano’s machine center has a relatively long backlog and sets a fresh schedule every 2 weeks, which does not disturb earlier schedules. Below are the jobs received during the previous 2 weeks. They are ready to be scheduled today, which is day 241 (day 241 is a workday). Job names refer to names of clients and contract numbers.
Job
Date job received
Productiondays needed
Date job due
BR-02
228
15
300
CX-01
225
25
270
DE-06
230
35
320
RG-05
235
40
360
SY-11
231
30
310
a. Complete the following table. (Show your supporting calculations.)
b.Which dispatching rule has the best score for flow time?
c. Which dispatching rule would you select? Support your decision.
Chapter 14 Solutions
Practical Operations Management
Ch. 14 - Prob. 1DQCh. 14 - Prob. 2DQCh. 14 - Prob. 3DQCh. 14 - Prob. 4DQCh. 14 - Prob. 5DQCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 6P
Ch. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - Prob. 12PCh. 14 - Prob. 13PCh. 14 - Prob. 14PCh. 14 - Prob. 15PCh. 14 - Prob. 16PCh. 14 - Prob. 17PCh. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 26PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 1.1QCh. 14 - Prob. 1.2QCh. 14 - Prob. 1.3QCh. 14 - Prob. 1.4Q
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