Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 15P
The following is a table of activities associated with a project at Rafay Ishfaq’s software firm in Chicago, their durations, 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 | --- | |||
- a. Draw an AON diagram of the project, including activity durations.
- b. Define the critical path, listing all critical activities in chronological order.
- c. What is the project duration (in weeks)?
- d. What is the slack (in weeks) associated with any and all noncritical paths through the project?
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The following is a table of activities associated with a project at Rafay Ishfaq's software firm in Chicago, their durations and what activities each must precede:
Duration (weeks)
Precedes
B, C
E
F
F
Activity
A (start)
What is the total slack for the non critical path(s) in the project?
BOE
C
F (end)
1
2.
2182
This exercise contains only parts b, c, and d.
b) The activities on the critical path are
c) The total project completion time for Rafay Ishfaq's software firm is weeks. (Enter your response as a whole number.)
d) Determine the slack time for each of the activities. (Enter your responses as whole numbers.)
ABC EF
11
Activity Slack Time (weeks)
week(s) (Enter your response as a whole number.)
The following represents a project that should be scheduled using CPM:
ACTIVITY
A
B
C
D
E
F
G
H
IMMEDIATE
PREDECESSORS
A
A
B
C, D
D, E
F,G
b. What is the critical path?
ⒸA-D-G-H
OB-E-G-H
ⒸA-C-F-H
A-D-F-H
Probability
TIMES (DAYS)
b
Project completion time
a
1
1
2
1
1
3
1
2
m
2
2
2
8
2
4
3
3
6
9
11
9
3
c. What is the expected project completion time?
Note: Do not round intermediate calculations. Round your answer to 3 decimal places.
11
11
11
X Answer is not complete.
days
d. What is the probability of completing this project within 19 days?
Note: Use Excel's NORM.S.DIST function to find the correct probability for your computed Z value. Do not round intermediate
calculations. Round Z value to 2 decimal places and final answer to 4 decimal places.
Consider the project described in the table
below:
Activity Duration
A
B
C
D
E
F
G
H
9
4
8
8
5
7
4
6
OEST-9 and LCT = 15
OEST=9 and LCT = 13
Immediate
Predecessor
What is the earliest start time (EST) and latest
completion time (LCT) of activity B?
OEST=9 and LCT = 20
OEST-9 and LCT-17
-
A
A
A
B
B,C
C,D
E,F,G
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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