A competitor of Kozar International Inc. has begun marketing a new instant-developing film project. Kozar has had a similar product under study in its research and developmet (R&D) department but has not yet been able to begin production. Because of the competitor's action, top managers have asked for a speedup of R&D activities so that Kozar can produce and market instant film at the earliest possible date. The predecessor information and activity time estimates in months are as follows:
Activity Immediate Predecessors Optimistic Time Most Probable Time Pessimistic Time
A - 1 1.5 5
B A 3 4 5
C A 1 2 3
D B , C 3.5 5 6.5
E B 4 5 12
F C, D, E 6.5 7.5 11.5
G E 5 9 13
a. Draw the project network
b. Develop an activity schedule for this project using early and late start and finish times, compute activity slack time, and define the critical activities