Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 19P
Three activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical). Activity details are in the following table:
- a. What action would you take to reduce the critical path by 1 day?
- b. Assuming no other paths become critical, what action would you take to reduce the critical path one additional day?
- c. What is the total cost of the 2-day reduction?
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Students have asked these similar questions
Development of Version 2.0 of a particular accounting software product is being considered by Jose Noguera's technology firm in Baton Rouge. The activities necessary for the completion of this project are listed in the following table:
Activity
Normal Time (weeks)
Crash Time (weeks)
Normal Cost
Total Cost with Crashing
Immediate Predecessor(s)
A
4
3
$2,100
$2,750
—
B
2
1
$2,300
$3,100
—
C
3
3
$600
$600
—
D
8
4
$2,400
$2,720
A
E
6
3
$1,000
$1,450
B
F
3
2
$3,000
$4,400
C
G
4
2
$1,500
$2,000
D, E
a) Based on the given information regarding the activities for the project, the project length =
enter your response here
weeks.
b) The total cost required for completing this project on normal time =
$enter your response here.
c) For…
Development of Version 2.0 of a particular accounting software product is being considered by Jose Noguera's technology firm in Baton Rouge. The activities necessary for the completion of this project are listed in the following table:
Activity
Normal Time (weeks)
Crash Time (weeks)
Normal Cost
Total Cost with Crashing
Immediate Predecessor(s)
A
4
3
$2,100
$2,800
—
B
2
1
$2,300
$3,100
—
C
3
3
$600
$600
—
D
8
4
$2,400
$2,680
A
E
6
3
$1,000
$1,450
B
F
3
2
$3,200
$4,600
C
G
4
2
$1,400
$2,000
D, E
Part 2
a) Based on the given information regarding the activities for the project, the project length =
enter your response here
weeks.
Three activities are candidates for crashing on a project network for a large computer installation (all are, of course,
critical). Activity details are in the following table:
Activity
A
B
C
Normal Time Crash Time Normal
(days)
(days)
Cost
7
6
4
11
2
9
$5,000
$1,400
$4,000
Total Cost
with
Immediate
Crashing Predecessor(s)
$5,600
$3,300
$6,400
a) Activity that should be crashed first to reduce the project duration by 1 day is A
b) Activity that should be crashed next to reduce the project duration by one additional day is
A
B
A
B
C
ect: 0
Chapter 3 Solutions
Operations Management
Ch. 3 - Give an example of a situation in which project...Ch. 3 - Explain the purpose of project organization.Ch. 3 - What are the three phases involved in the...Ch. 3 - What are some of the questions that can be...Ch. 3 - Define work breakdown structure. How is it used?Ch. 3 - What is the use of Gantt charts in project...Ch. 3 - What is the difference between an...Ch. 3 - What is the significance of the critical path?Ch. 3 - What would a project manager have to do to crash...Ch. 3 - Describe how expected activity times and variances...
Ch. 3 - Define earliest start, earliest Finish, latest...Ch. 3 - Students are sometimes confused by the concept of...Ch. 3 - What are dummy activities? Why are they used in...Ch. 3 - What are the three time estimates used with PERT?Ch. 3 - Would a project manager ever consider crashing a...Ch. 3 - How is the variance of the total project computed...Ch. 3 - Describe the meaning of slack, and discuss how it...Ch. 3 - How can we determine the probability that a...Ch. 3 - Name some of the widely used project management...Ch. 3 - The work breakdown structure (WBS) for building a...Ch. 3 - 3.2 Robert Day has decided to run for a seat as...Ch. 3 - Draw the activity-on-node (AON) project network...Ch. 3 - Given the activities whose sequence is described...Ch. 3 - 3.5 Using AOA, diagram the network described below...Ch. 3 - Stephen Hall is developing a program in supply...Ch. 3 - Task time estimates for the modification of an...Ch. 3 - 3.8 The City Commission of Nashville has decided...Ch. 3 - Refer to the table in Problem 3.8. a. Draw the AON...Ch. 3 - The activities needed to build a prototype laser...Ch. 3 - Dave Fletcher (see Problem 3.10) was able to...Ch. 3 - The activities described by the following table...Ch. 3 - A renovation of the gift shop at Orlando Amway...Ch. 3 - Kelle Carpet and Trim installs carpet in...Ch. 3 - The following is a table of activities associated...Ch. 3 - Assume that the activities in Problem 3.15 have...Ch. 3 - Bill Fennema, president of Fennema Hospitality,...Ch. 3 - What is the minimum cost of crashing the following...Ch. 3 - Three activities are candidates for crashing on a...Ch. 3 - Development of Version 2.0 of a particular...Ch. 3 - The estimated times and immediate predecessors for...Ch. 3 - Rich Cole Control Devices, Inc., produces...Ch. 3 - Four Squares Productions, a firm hired to...Ch. 3 - Using PERT, Adam Munson was able to determine that...Ch. 3 - Clark Products makes pizza ovens for commercial...Ch. 3 - The Tesla 6 is a new custom-designed sports car....Ch. 3 - TABLE 3.6 Southwestern University Project 1....Ch. 3 - TABLE 3.6 Southwestern University Project 2 What...Ch. 3 - TABLE 3.6 Southwestern University Project 3. If it...Ch. 3 - Project Management at Arnold Palmer Hospital Video...Ch. 3 - The equivalent of a new kindergarten class is born...Ch. 3 - The equivalent of a new kindergarten class is born...Ch. 3 - The equivalent of a new kindergarten class is born...Ch. 3 - At the Hard Rock Cafe, like many organizations,...Ch. 3 - At the Hard Rock Cafe, like many organizations,...Ch. 3 - At the Hard Rock Cafe, like many organizations,...Ch. 3 - At the Hard Rock Cafe, like many organizations,...
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- Three activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical). Activity details are in the following table: Activity Normal Time (days) Crash Time (days) Normal Cost Total Cost with Crashing Immediate Predecessor(s) A 6 $6,000 $6,400 B $1,200 $3,000 C 11 $4,000 $6,000 a) Activity that should be crashed first to reduce the project duration by 1 day is b) Activity that should be crashed next to reduce the project duration by one additional day is c) Total cost of crashing the project by 2 days = $_____ (Enter your response as an integer.) 7 4 2 9 A B ---arrow_forwardDevelopment of Version 2.0 of a particular accounting software product is being considered by Jose Noguera's technology firm in Baton Rouge. The activities necessary for the completion of this project are listed in the following table: Activity Normal Time (weeks) Crash Time (weeks) Normal Cost Total Cost with Crashing Immediate Predecessor(s) A 44 33 $ 2 comma 100$2,100 $ 2 comma 700$2,700 long dash— B 22 11 $ 2 comma 200$2,200 $ 2 comma 900$2,900 long dash— C 33 33 $ 500$500 $ 500$500 long dash— D 88 44 $ 2 comma 500$2,500 $ 2 comma 820$2,820 A E 66 33 $ 1 comma 000$1,000 $ 1 comma 300$1,300 B F 33 22 $ 3 comma 400$3,400 $ 4 comma 800$4,800 C G 44 22 $ 1 comma 500$1,500 $ 2 comma 000$2,000 D, E Part 2 a) Based on the given information…arrow_forwardThree activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical) Activity details are in the following table: a) Activity that should be orashed first to reduce the project duration by 1 day is b) Activity that should be crashed next to reduce the project duration by one additional day is c) Total cost of crashing the project by 2 days = S (Enter your response as an integer) Normal Activity Time (days) A B C 7 4 11 Crash Normal Time (days) Cost $8,000 $1,200 $4,200 6 2 9 Total Cost with Crashing Immediate Predecessor(s) $6,500 $3,000 $6.200 A Barrow_forward
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- A large Southeast city is requesting federal funding for a park-and-ride project. One of the requirements in the request application is a network plan for the design phase of the project. Sophie Kim, the chief engineer, wants you to develop a project network plan to meet this requirement. She has gathered the activity time estimates and their dependencies shown here. Description Survey Soils report C Traffic design D Lot layout E Approve design Illumination G Drainage H Landscape I Signage J Bid proposal ID A B The project is expected to take The critical path is: Early start for Activity E is: Late finish for Activity F is: Slack for Activity C is: Predecessor None A A A B, C, D E E E E F, G, H, I Time (days) 13 22 21 a 9 74 20 20 22 17 15 12 days. day(s).arrow_forwardThe managers at AllBirds have operations in multiple countries, which operate on different financial management systems. This has been increasingly challenging for the company, so the Justin is looking to consolidate and integrate the financial management across all locations into a single software system that can operate across the national boundaries. This is a new, complicated and lengthy project, so Justin has identified a set of activity categories that will need to be carefully managed, as noted in the table. What is the probability that project can be completed two months early?arrow_forwardDevelopment of Version 2.0 of a particular accounting software product is being considered by Jose Noguera's technology firm in Baton Rouge. The activities necessary for the completion of this project are listed in the following table: Activity A BCDEFG Normal Time Crash Time Normal (weeks) Cost $2,100 Total Cost with Immediate Crashing Predecessor(s) 4 $2,800 $2,200 $2,900 $750 $750 $2,500 $2,820 $1,000 $1,300 $3,200 $4,700 $1,400 $1,900 2 3 8 6 3 4 (weeks) 3 1 34 4 322 a) Based on the given information regarding the activities for the project, the project length = b) The total cost required for completing this project on normal time = $ weeks. c) For reducing the duration of the project by one week, the activity that should be crashed first is activity The cost of the project based on the first activity selected for crashing will increase by $ d) The maximum weeks by which the project can be reduced by crashing = Total cost of crashing the project to minimum (or maximum weeks…arrow_forward
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