✔ 最佳答案
(b) According my result, the answer is
Earlist start Latest start Earlist finish Latest finish slack
A 0 0 3 3 0
B 0 1 9 10 1
C 3 3 6 6 0
D 3 8 7 12 5
E 9 10 11 12 1
F 6 6 14 14 0
G 14 14 16 16 0
H 11 12 15 16 1
Notice that slack=LS-ES=LF-EF
(c) The critical path is start->A->C->F->G->finish with the completion time 16 days
(d) There are 5 days for activity D overruns without affecting the earlist project completion time. Since F lies on the critical path, it cannot be overrun otherwise the earlist project completion time will be delayed.