ENGINEERING DESIGN PROCESS
ENGINEERING DESIGN PROCESS
3rd Edition
ISBN: 9781305253285
Author: HAIK
Publisher: CENGAGE L
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Textbook Question
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Chapter 2.8, Problem 1P

Table 2.3 breaks down the number of major jobs or activities involved in painting a two-story house.

  1. a. Develop a CPM network.
  2. b. Determine the critical path of the network.
  3. c. Determine the expected project’s duration time period.

Table 2.3: Problem 1

Chapter 2.8, Problem 1P, Table 2.3 breaks down the number of major jobs or activities involved in painting a two-story house.

(a)

Expert Solution
Check Mark
To determine

A CPM network.

Explanation of Solution

The CPM network for the data given in the Table 2.3 is shown below:

ENGINEERING DESIGN PROCESS, Chapter 2.8, Problem 1P , additional homework tip  1

(b)

Expert Solution
Check Mark
To determine

The critical path of the network.

Answer to Problem 1P

The critical path activities are as follows.

Critical Paths
A-B-D-E-G-H-I-K
A-B-D-E-G-H-J-K
A-C-D-E-G-H-I-K
A-C-D-E-G-H-J-K

Explanation of Solution

Using Excel spread sheet the network path is framed and its critical path is identified and shown below:

ActivityEarly Start TimeEarly Finish Time
DurationLate Start TimeLate Finish Time
Float/Slack

ENGINEERING DESIGN PROCESS, Chapter 2.8, Problem 1P , additional homework tip  2

Formula:

ENGINEERING DESIGN PROCESS, Chapter 2.8, Problem 1P , additional homework tip  3

ENGINEERING DESIGN PROCESS, Chapter 2.8, Problem 1P , additional homework tip  4

ENGINEERING DESIGN PROCESS, Chapter 2.8, Problem 1P , additional homework tip  5

The identified network paths are shown below with duration:

PathsDuration
A-B-D-E-F-H-J-K23
A-B-D-E-G-H-I-K26
A-B-D-E-G-H-J-K26
A-C-D-E-F-H-I-K23
A-C-D-E-F-H-J-K23
A-C-D-E-G-H-I-K26
A-C-D-E-G-H-J-K26

The path with the longest duration is the critical path. Hence, the critical path activities are as follows.

Critical Paths
A-B-D-E-G-H-I-K
A-B-D-E-G-H-J-K
A-C-D-E-G-H-I-K
A-C-D-E-G-H-J-K

(c)

Expert Solution
Check Mark
To determine

The expected project duration time.

Explanation of Solution

Refer part (b)

The expected project duration time is shown below:

PathsDuration
A-B-D-E-G-H-I-K26
A-B-D-E-G-H-J-K26
A-C-D-E-G-H-I-K26
A-C-D-E-G-H-J-K26

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