Problem 7

Use the following project information:

Activity		Optimistic Time Estimate(weeks)		Most Likely Time Estimates (weeks)		Pessimistic Time Estimates (weeks)		Immediate Predecessor(s)
A		2		7		11		none
B		2		4		8		A
C		5		8		12		A
D		5		7		11		B
E		4		9		17		C
F		3		4		5		D,E
G		2		5		8		D,E
H		5		6		12		F
I		4		7		12		G
J		3		3		3		H,I

(a) Calculate the expected completion time for this project.

(Round your answer to 2 decimal places, the tolerance is +/-0.01.)

Project completion time =

weeks.

(b) Identify the activities included on the critical path of this project. (If there are several critical paths enter the first one from the alphabetical order.)

Critical activities:

ABDGIJ

ABDFHJ

ACEGIJ

ACEFHJ

.