Project Management Systems Activity Duration and Predecessor Information

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In this homework you be working through four Activity In Box (AIB) problems. Using the activity, duration, and predecessor information given in this document, you should first construct a network for each "project." [Each problem will have its own network.]

Once you have constructed the networks, you will log into the “Homework Exam" in Week 4 and input the answers to the homework questions.

Problem 1

The following data were obtained from a project to create a new portable electronic.

ActivityDurationPredecessors
A3 Days---
B4 Days---
C6 Days---
D2 DaysA, B
E1 DaysC
F3 DaysD
G3 DaysE, F
H7 DaysD
I10 DaysG

Construct a network for the project. Then review and answer the multi-part question found on the Homework tab in Week 4.

Question
(A.) What is the Scheduled Completion of the Project? [2 points] (B.) What is the Critical Path of the Project? [3 points]
(C.) What is the EST for Activity D? [2 points]
(D.) What is the LST for Activity G? [2 points]
(E.) What is the EF for Activity B? [2 points]
(F.) What is the LF for Activity H? [2 points]
(G.) What is the float for Activity I? [2 points] (Points: 15)

Answer:
A. 22 days
B. B, D, F, G, I
C. EST = 4
D. LST = 9
E. EF = 4
F. LF = 22
G. Float = 0

Problem 2

The following data were obtained from a project to build a pressure vessel:

ActivityDurationPredecessors
A4 weeks---
B4 weeks---
C3 weeksB
D2 weeksA, C
E3 weeksB
F5 weeksD, E, G
G2 weeksB
H6 weeksF
I3 weeksG
J1 weekI

Construct a network for the project. Then review and answer the multi-part question found on the Homework tab in Week 4.

Question:
(A.) Calculate the scheduled completion time and identify the critical path. [7 points] (B.) What is the slack time (float) for activities A, D, E, and G? [8 points] (Points: 15)

Answer:
A. 20 weeks / critical path is B, C, E, D, F, H
B. Float time for A 7-4 = 3
Float time for D...
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