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.

Posted Date: 2/27/2013 12:07:21 AM | Location : United States

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