Consider the activities, durations, and predecessor relationships in the following network, shown in Table 6 below. Draw the network and answer the questions that follow. Table 5 Activity Description Predecessor(s) A B C Optimistic Most Likely Pessimistic (Weeks) 10 Immediate (Weeks) (Weeks) 4 7 2 8 A 8 20 A 12 16 D B 1 2 3 D, C C 6 2 8. 22 F F 2 2 10 E, G, H 4 1 12 3 a) What is the expected time for activity B? b) What is the variance for activity B? c) Based on the calculation of estimated times, what is the critical path? d) What is the estimated time of the critical path?

Purchasing and Supply Chain Management
6th Edition
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
ChapterC: Cases
Section: Chapter Questions
Problem 5.3SD: Scenario 4 Sharon Gillespie, a new buyer at Visionex, Inc., was reviewing quotations for a tooling...
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QUESTION 8
Consider the activities, durations, and predecessor relationships in the following network,
shown in Table 6 below. Draw the network and answer the questions that follow.
Table 5
Pessimistic
Activity
Description
Most Likely
(Weeks)
Immediate
Optimistic
Predecessor(s)
(Weeks)
(Weeks)
A
4
10
---
A
2
8
20
A
12
16
D
1
2
E
D, C
22
F
3
4
G
F
2
2
F
6
8
10
E, G, H
4
8
12
J
2
3
a) What is the expected time for activity B?
b) What is the variance for activity B?
c) Based on the calculation of estimated times, what is the critical path?
d) What is the estimated time of the critical path?
e) What is the activity variance along the critical path?
f) What is the probability of completion of the project before week 42?
Transcribed Image Text:QUESTION 8 Consider the activities, durations, and predecessor relationships in the following network, shown in Table 6 below. Draw the network and answer the questions that follow. Table 5 Pessimistic Activity Description Most Likely (Weeks) Immediate Optimistic Predecessor(s) (Weeks) (Weeks) A 4 10 --- A 2 8 20 A 12 16 D 1 2 E D, C 22 F 3 4 G F 2 2 F 6 8 10 E, G, H 4 8 12 J 2 3 a) What is the expected time for activity B? b) What is the variance for activity B? c) Based on the calculation of estimated times, what is the critical path? d) What is the estimated time of the critical path? e) What is the activity variance along the critical path? f) What is the probability of completion of the project before week 42?
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