Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
10th Edition
ISBN: 9780134181981
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Chapter 3, Problem 19P
Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table:
a) Determine the expected completion time and variance for each activity.
b) Determine the total project completion time and the critical path for the project.
c) Determine ES, EF, LS, LF, and slack for each activity.
d) What is the probability that Kelle Carpet and Trim will finish the project in 40 days or less?
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Al construction has developed tasks duration and predecessor relationships in the following table for building model houses. The manager has been concerned with the amount of time it took to complete several jobs, some of the company workers are very unreliable. A list of activities and their optimistic completion time, the most likely time and the pessimistic completion time (in days) for a new contract are given in the following table.
Activity
Predecessors
Optimistic (a)
Most likely (m)
Pessimistic (b)
A
--
1
2
3
B
-
2
3
4
C
A
4
5
6
D
B
8
9
10
E
C, D
2
5
8
F
D
4
5
6
G
E
1
2
3
1.Draw the activity network for this new contract (either AON or AOA).
2. Determine the Expected Time and Variance for each activity.
3.. Show the activity schedule (ES, EF, LS, and LF) as well as slack (in table).…
What's the best way to resolve this problem?
Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table:
Activity
a
m
b
Immediate Predecessor(s)
Activity
a
m
b
Immediate Predecessor(s)
A
3
5
9
-
G
1
2
3
A, E
B
4
5
6
-
H
4
6
8
F
C
1
2
3
-
I
10
11
12
G
D
7
8
9
C
J
15
17
19
C
E
1
3
5
B, D
K
4
8
12
H, I
F
5
10
15
A, E
b) Activities on the critical path for the project are C - D - E - F - H - K
c) For the given project, the earliest start (ES) and earliest finish (EF) are:
For the given project, the latest start (LS) and latest finish (LF) are:
(Round your responses to two decimal places.)
Referring to the…
Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic
completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table:
Activity a
A
4
10
11
с
1
7
8
M
2
4
1
7
11
10
11
4
J
13
5
BCDEFGH-X
K
This exercise contains only part a.
a) Based on the activity time estimates, the expected times and variance for each of the activities are:
(Round your responses to two decimal places.)
Activity
Time (days)
DEF I - X
K
m
5
2
2
6
15
9
Immediate
b Predecessor(s)
9
12
3963 HZ873
14
12
17
13
1105
Expected Time
A
B
C
III
G
H
B, D
A, E
A, E
F
G
C
H, I
Variance
Chapter 3 Solutions
Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
Ch. 3 - Ethical Dilemma Two examples of massively...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 - Prob. 10DQCh. 3 - Define earliest start, earliest finish, latest...Ch. 3 - Students are sometimes confused by the concept of...Ch. 3 - Prob. 13DQCh. 3 - Prob. 14DQCh. 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 - What is the difference between the waterfall...Ch. 3 - The work breakdown structure (WBS) for building a...Ch. 3 - James Lawson has decided to run for a seat as...Ch. 3 - Prob. 3PCh. 3 - Refer to the table in Problem 3.3. a) Draw the AON...Ch. 3 - Draw the activity-on-node (AON) project network...Ch. 3 - Given the activities whose sequence is described...Ch. 3 - Prob. 7PCh. 3 - Roger Ginde is developing a program in supply...Ch. 3 - Prob. 9PCh. 3 - The activities described by the following table...Ch. 3 - Prob. 11PCh. 3 - The activities needed to build a prototype laser...Ch. 3 - Dave Fletcher (sec Problem 3.12) was able to...Ch. 3 - The Rover 6 is a new custom-designed sports car....Ch. 3 - Ross Hopkins, president of Hopkins Hospitality,...Ch. 3 - A renovation of the gift shop at Orlando Amway...Ch. 3 - Kelle Carpet and Trim installs carpet in...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 - Prob. 23PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Development of Version 2.0 of a particular...Ch. 3 - Prob. 32PCh. 3 - Prob. 1CSCh. 3 - Prob. 2CSCh. 3 - Prob. 3CSCh. 3 - Prob. 1.1VCCh. 3 - Prob. 1.2VCCh. 3 - Project Management at Arnold Palmer Hospital The...Ch. 3 - Prob. 1.4VCCh. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...
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