Question

PLEASE ANSWER IN 30 MINUTES

PM.53 Sun Oracle is launching a new computer component. The team has broken the project down into activities, with the following durations:

Activity	Duration (weeks)	Immediate Predecessor(s)
A	20	-
B	12	-
C	15	A
D	5	B
E	6	D
F	14	A,E
G	5	F
H	3	C,G

What is the duration of the project?
   weeks

What is the latest start week for activity C?
   

What is the slack time for activity C?
   weeks

If activity D were shortened by 3 weeks, what would be the new duration of the project?
   weeks

Answer 1

Activity	ES	EF	LS	LF	Slack
A	0	20	3	23	3
B	0	12	0	12	0
C	20	35	27	42	7
D	12	17	12	17	0
E	17	23	17	23	0
F	23	37	23	37	0
G	37	42	37	42	0
H	42	45	42	45	0

Slack = LF-EF = LS-ES

Duration of the project = duration of the longest path B-D-E-F-G-H = 45 weeks

latest start week for activity C = 27

Slack time for activity C = 7 weeks

If activity D were shirtened by 3 weeks new duration of the project would be 45-3 = 42 weeks as activity D is in critical path