Atkinson department is installing new computer system. They have to perform several activities. Following table provides information about the project:
|
Activity
|
Immediate
Predecessor
|
Normal Time
(days)
|
Crash Time
(days)
|
Normal Cost ($)
|
Crash Cost($)
|
|
A
|
NONE
|
6
|
4
|
4200
|
7240
|
|
B
|
NONE
|
9
|
6
|
9800
|
14240
|
|
C
|
NONE
|
4
|
3
|
12000
|
12800
|
|
D
|
NONE
|
16
|
12
|
24000
|
25000
|
|
E
|
A
|
5
|
4
|
7800
|
9600
|
|
F
|
A
|
3
|
1
|
6700
|
7200
|
|
G
|
C
|
6
|
5
|
6600
|
7200
|
|
H
|
E,F
|
7
|
6
|
14500
|
15200
|
|
I
|
B
|
3
|
2
|
18000
|
19100
|
|
J
|
G
|
5
|
2
|
34060
|
38800
|
|
K
|
H
|
3
|
1
|
14000
|
15800
|
|
L
|
F, I
|
9
|
6
|
21000
|
25500
|
|
M
|
J
|
3
|
2
|
6000
|
6750
|
|
N
|
K
|
1
|
1
|
9500
|
9500
|
|
O
|
D,M
|
4
|
3
|
12500
|
13650
|
|
P
|
L,N,O
|
8
|
8
|
21000
|
21000
|
(a) Draw network diagram for normal time?
(b) What is the normal completion time and cost?
(c) What are the critical activities and what is/are the critical path/s?
(d) If you want to complete the project ONE day earlier, which activity or activities should be crashed?
(e) After the crashing in part 'd' has been done, list ALL the paths in this network with the time required for each path. Among the paths you stated which path/s is/are critical, Why?
(f) After the crashing in part 'd' has been done, you want to reduce completion time by further ONE day. Which activity or activities should be crashed?
(g) After the crashing in part 'f' has been done, list ALL the paths in this network with the time required for each path. Among the paths you stated which path/s is/are critical, Why?
(h) After the crashing in part 'f' has been done, you want to reduce completion time by further ONE day. Which activity or activities should be crashed?
(i) After the crashing in part 'h' has been done, list ALL the paths in this network with the time required for each path. Among the paths you stated which path/s is/are critical, Why?
Note: Beside Network diagram for part 'a', you have to draw network diagram for part d, f and h to support the work.
Part 'a' network diagram represent normal completion time: Part 'd' after crashing one day.
Part 'f' after crashing another day. : Part 'h' after crashing another day.
I am not asking maximum crashing.
Your network diagram should not have vertically upward, vertically downward and backward arrows.