Part 6a

1
Part 6a

• Project Crashing

2
Given the information below, what is the total
additional cost to crash the project as much as
possible?
c6
5
4
6
f8
a7
d4
Path Durations a c f 21 a d g 16 b e g 20
4
b6
20 16 20
19 15 19
18 14 18
g5
5
e9
Activity Normal Duration Crashed Duration Normal Cost Crashed Cost Additional Cost/day
a 7 6 40 50
b 6 5 50 65
c 6 4 50 66
d 4 2 40 50
e 9 9 70 70
f 8 5 60 105
g 5 4 45 52
10
6
15
5
8
5
4
5
--
15
4
7
Alternatives
if then
cost result
Project Duration Crash Activity Additional Cost New Critical Path
21 -- -- acf





ab 25
ag 17
bc 23
cg 15
20
c
8
acf / beg
bf 30
19
cg
15
acf / beg
fg 22
18
ab
25
acf / beg
17
Total
48
All activities on critical path beg are at their
minimum durations