Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
12th Edition
ISBN: 9780134741062
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 12P
Table 7.5 contains information about au environmental cleanup project in the township of Hiles. Shorten the project 3 weeks by finding the minimum—cost
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Table 7.5 contains information about an environmental clean-up project in the township of Hiles. Shorten the project threeweeks by finding the minimum-cost schedule. Assume thatproject indirect costs and penalty costs are negligible. Identifyactivities to crash while minimizing the additional crash costs.
Q4/ The table below shows the duration and direct costs for the activities of a
construction project. It is required to caleculate the duration of the project that achieves
the lowest possible total cost using the technique of crashing if the indirect costs are
20% from direct cost.
Normal Time (NT) Normal Cost
(NC) S
Crash Time
Crash Cost
Activity
(CT) weeks
(CC) S
weeks
A
6.
1000
3.
7000
В
4
9000
5
10000
C
3
6000
1
10000
D
4
8000
2.
11000
E
6.
1000
4
13000
5
6.
D
A
3
End
Start
6.
B
E
The expected times and variances for the
activities for a project for Test Marketers, Inc.
are given below. (Assume time is provided in
days.)
ID
12345678
Description
Pilot production
Select channels of distrib.
Develop mktg. program
Test market
Patent
Full production
Ad promotion
Release
Predecessor
None
None
None
1
1
4
3
2,5,6,7
t₂
6
7
4
4
10
16
3
2
Varlance
[(b-a)/6]²
34225221
10
Chapter 7 Solutions
Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
Ch. 7 - One of your colleagues comments that software is...Ch. 7 - Explain how to determine the slack for each...Ch. 7 - Define risk as it applies to projects. What are...Ch. 7 - Consider the following data for a project to...Ch. 7 - The following information is known about a project...Ch. 7 - A project for improving a billing process has the...Ch. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Consider the following information for a project...Ch. 7 - Consider the following data for a project to...
Ch. 7 - Paul Silver, owner of Sculptures International,...Ch. 7 - Prob. 9PCh. 7 - The following information concerns a project to...Ch. 7 - Consider a project to produce custom door moldings...Ch. 7 - Table 7.5 contains information about au...Ch. 7 - The Advanced Tech Company has a project to design...Ch. 7 - Prob. 14PCh. 7 - Table 7.8 contains data for the installation of...Ch. 7 - The diagram in Figure 7.12 was developed for the...Ch. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - You are the project manager of the software...Ch. 7 - Jordanne King, the project manager for Webjets...Ch. 7 - Recently, you were assigned to manage a project to...Ch. 7 - In Solved Problem 2, estimate the probability that...Ch. 7 - The director of continuing education at Bluebird...Ch. 7 - Gabrielle Kramer, owner of Pet Paradise, is...Ch. 7 - The project manager of Good Public Relations...Ch. 7 - Consider the office renovation project data in...Ch. 7 - Activity B and activity K are critical activities....Ch. 7 - Prob. 2AMECh. 7 - Prob. 3AMECh. 7 - Prob. 4AMECh. 7 - Prob. 5AMECh. 7 - Assess the four categories of a risk-management...Ch. 7 - Prob. 2VCCh. 7 - Assume you are Denise Tower and have...Ch. 7 - Prob. 1CCh. 7 - Prob. 2CCh. 7 - Prob. 3CCh. 7 - Prob. 4C
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- The table below contains information about an environmental clean-up project in the township of Hiles. Shorten the project three weeks by finding the minimum-cost schedule. Assume that project indirect costs and penalty costs are negligible. Identify activities to crash while minimizing the additional crash costs. Normal Time Crash Time Cost to Crash Immediate Activity (weeks) (weeks) ($ per week) Predecessor(s) А 5 4 200 None В 9 8. 300 None C 4 200 А 4 2 250 A 3 3 В F 3 С, D G 3 1 150 D, E 7 350 F 4 4 G Fill in the table below with the activity times after crashing to show the resulting schedule. (Enter your responses as whole numbers.) Time according to schedule (weeks) Time according to schedule (weeks) Activity Activity A В G C H Earrow_forwardChuck’s Custom Boats (CCB) builds luxury yachts to customer order. CCB has landed a contract with a wealthy customer. Relevant data are shown in the table below. The complication is that the customer wants delivery in 32 weeks or he will impose a penalty of $375 for each week his yacht is late. Activity Immediate Predecessor Normal Time (NT) Weeks Crashing Cost 1st Week 2nd Week A ― 9 $410 $415 B A 7 125 -- C A 5 45 45 D B 4 300 350 E C 6 50 -- F D, E 5 200 225 G F 8 -- -- H F 7 85 90 I G 6 90 -- Construct a network diagram for the project Indicate the critical path when normal activity times are used. Develop a crashing schedule. Note: No activity can be crashed more than two weeks. Show breakdown of workarrow_forwardThe following table shows the various activities of the development of a new product in your organization. Activity Event Immediate Predecessor(s) Estimates of Activity Duration (Weeks) Optimistic (To) Most Likely (Tm) Pessimistic (Tp) Average (Te) 1 A - 2 3 4 ? 3 2 B A 1 2 3 2 3 C A 1 2.05 4 2.2 4 D B 4 5 6 5 5 E B 3 4 5 4 6 F C 2 3 4 3 7 G D 1.2 2 4 2.2 8 H E,F, G 3 4 6 4.167 9 I H 3 4 5 4 10 J I 2 1 3 1.5 Questions: Draw the PERT network from the given data. (arrow_forward
- The following table shows the various activities of the development of a new product in your organization. Activity Event Immediate Predecessor(s) Estimates of Activity Duration (Weeks) Optimistic (To) Most Likely (Tm) Pessimistic (Tp) Average (Te) 1 A - 2 3 4 ? 2 B A 1 2 ? 2 3 C A 1 ? 4 2.2 4 D B ? 5 6 5 5 E B 3 ? 5 4 6 F C 2 3 ? 3 7 G D ? 2 4 2.2 8 H E,F, G 3 4 6 ? 9 I H 3 ? 5 4 10 J I 2 1 3 ? Questions: Calculate ALL the missing (?) data points. Draw the PERT network from the given data. Determine ALL the paths, the critical path and its total duration in days. Explain the limitations…arrow_forward3.8 Roger Ginde is developing a program in supply chain management certification for managers. Ginde has listed a num- ber of activities that must be completed before a training program of this nature could be conducted. The activities, immediate pre- decessors, and times appear in the accompanying table: a) DrawtheappropriateAONPERTdiagramforJ.C.Howard’s management team. b) Find the critical path. c) What is the project completion time? • • 3.11 The following is a table of activities associated with a project at Rafay Ishfaq’s software firm in Chicago, their dura- tions, and what activities each must precede: ACTIVITY DURATION (WEEKS) PRECEDES A (start) 1 B, C B 1 E C 4 F E 2 F F (end) 2 — ACTIVITY IMMEDIATE PREDECESSOR(S) TIME (DAYS) A — 2 B — 5 C — 1 D B…arrow_forwardIn project management why is float important?arrow_forward
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