# Project Management Systems Activity Duration and Predecessor Information

Topics: Critical path method, Question, Following Pages: 4 (692 words) Published: October 1, 2011
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)

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)

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