Question

A large playground for the new town square in Celebration, Florida, is in the planning stages. Here are the six activities to be completed.

Activity	Hours Needed	Immediate Predecessor(s)
Planning(A)	20	-
Buying Supplies(B)	60	Planning(A)
Digging/Grading(C )	100	Planning(A)
Sawing lumber(D)	30	Buying Supplies(B)
Placing lumber(E )	20	Digging/Grading(C ) and Sawing(D)
Assembly/Painting(F )	10	Pacing lumber(E )

a) Develop an activity-on-arrow(AOA) network for this project

b) What is the project completion time?

Answer 1

1)

b) Project completion time is the longest activity path = A-C-E-F = 20+100+20+10 = 150hrs.