0
1.3kviews
The table below shows three time estimate of construction project
Activity to tm tp
A (10-20) 3 4 5
B (10-30) 6 8 10
C (20-40) 2 5 8
D (40-60) 9 10 11
E (40-70) 4 8 12
F (30-70) 7 9 11
G (30-50) 12 14 16
H (60-80) 3 6 9
K (70-80) 6 7 8
L (50-80) 3 6 9
Z -3 -2 -1 0 1 2 3
P (%) 0.001 0.023 0.159 0.5 0.841 0.977 0.999

a) Draw PERT network.

b) Determine the expected project completion time.

c) What is the probability that work can be completed in 25 days?

d) If probability is 90%, what will be the project duration?

1 Answer
0
21views

a)

enter image description here

b) Expected project Completion time is 28 days

c) z=S.TE.Dϵ

z=2528σ2

z=2528137

z=218

Z P
-2 0.023
-2.18 x
-3 0.001

x=0.019=19%

d)

%P Z
0.841 1
0.90 x
0.97 2

x=1.45

z=S.TE.Dϵ

1.45=ST28137

$S \cdot T=29 \cdot …

Create a free account to keep reading this post.

and 3 others joined a min ago.

Please log in to add an answer.