CPM Planning:
Crash Schedule
Crash Schedule – Example
3. 3. 3.
2. 2. 2.
1. 1. 1.
3. B D F 3.
2. 2.
1. 11 8 3 1.
1. 1. 1.
2. 2. 2.
A 3. 3. 3. Finish
7 0
3. 3. 3.
1. 1.
2. 2. 2.
2. 2.
1. 1. 1.
3. 3.
C E G
5 6 9
1. 1. 1.
2. 2. 2.
3. 3. 3.
Crash Schedule – Example
Minimum Direct Cost
Duration Per Day
A 4 800
B 6 500
C 4 700
D 6 400
E - -
F - -
G 6 1000
Crash Schedule – Solution
3. 4 10 3. 10 16 3. 16 19
2. 7 13 2. 13 19 2. 19 22
1. 1. 18 24 1. 24 27
7 18 18 26 26 29
3. 0 4 B D F 3. 25 25
2. 2. 28 28
1. 7 11 18 18 8 26 33 3 35 1. 33 33
0 7 1. 1. 18 6 24 1. 30 33 35 35
2. 7 6 13 2. 13 19 2. 25 28
A 3. 4 10 3. 10 16 3. 22 25 Finish
0 7 7 35 0 35
3. 4 9 3. 9 15 3. 16 25
1. 1. 33 33
2. 2. 2. 19 28
2. 2. 28 28
1. 1. 1. 24 33
3. 0 4 4 3. 25 25
7 12 12 18 26 35
C E G
13 5 18 20 6 26 26 9 35
1. 1. 18 24 1. 24 33
2. 8 13 2. 13 19 2. 19 28
3. 5 10 3. 10 16 3. 16 22
Crash Schedule – Solution
Minimum Direct Cost
Duration Per Day
A 4 800
B 6 500
C 4 700
D 6 400
E - -
F - -
G 6 1000
Step Action Duration Direct Cost Change
1 D, decrease by 2 days 33 +800
2 B, decrease by 5 days 28 +2,500
3 A, decrease by 3 days 25 +2,400
4 G, decrease by 3 days 22 +3,000
5 Total = +8,700