PROJ586 W3 Homework AIB Solutions 2

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Problem 1

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

Activity Duration Predecessors
A 5 Days ---
B 6 Days ---
C 8 Days ---
D 4 Days A, B
E 3 Days C
F 5 Days D
G 5 Days E, F
H 9 Days D
I 12 Days G

Step 1: Construct a network diagram for the project. (NOTE: EF for activity H should be 19)

Step 2: Answer the following questions: (15 points total)

a) What is the Scheduled Completion of the Project? (5 points)
Answer: 32 days

b) What is the Critical Path of the Project? (5 points)
Answer: B-D-F-G-I

c) What is the ES for Activity D? (1 points)
Answer: Day 6

d) What is the LS for Activity G? (1 points)
Answer: Day 15

e) What is the EF for Activity B? (1 points)
Answer: Day 6
f) What is the LF for Activity H? (1 points)
Answer: Day 32

g) What is the float for Activity I? (1 points)
Answer: 0 Days

Problem 2

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

Activity Duration Predecessors
A 6 weeks ---
B 6 weeks ---
C 5 weeks B
D 4 weeks A, C
E 5 weeks B
F 7 weeks D, E, G
G 4 weeks B
H 8 weeks F
I 5 weeks G
J 3 week I

Step 1: Construct a network diagram for the project.

Step 2: Answer the following questions: (15 points total)

a) Calculate the scheduled completion time. (5 points)
Answer: 30 weeks

b) Identify the critical path (6 points)
Answer: B-C-D-F-H
c) What is the slack time (float) for activity A? (1 points)
Answer: 5 weeks

d) What is the slack time (float) for activity D? (1 points)
Answer: 0 weeks

e) What is the slack time (float) for activity E? (1 points)
Answer: 4 weeks

f) What is the slack time (float) for activity G? (1 points)
Answer: 5 weeks

Problem 3

The following data were obtained from a project to design a new software package:

Activity Duration Predecessors
A 5 Days ---
B 8 Days ---
C 6 Days A
D 4 Days C, B
E 5 Days A
F 4 Days D, E, G
G 4 Days B, C
H 3 Day G

Step 1: Construct a

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