1. Complete a forward and backward pass to determine the ES, EF, LS and LF times for each project activity. (5 marks)
2. Determine the critical path and establish the minimum amount of time complete the entire project without crashing. (3 marks)
3. Determine the minimum-cost crashing schedule that will reduce the total length of the project by five weeks; which activities should you shorten (crash) and by how much. (6 marks)

Kc Be )A T# :9 14 12 M G De 38 150 17 Se End N }H ce 11 8: 186 104 PA | Fe 8 12 7 12 Length after crashing N weeks 5 4 3 2 >0 35 35 35- 355 35 N:(- Path A-B-KJ C-D-G-Mee 433 43 44 46 %45 45 43 44 40 44 43 45 .42 *46 -35 :45 47 >44 *49 - - G - C - E - H - NN C - E - H - P C - F - I - J - P 4263 426 %47 )43 %48 %45 EPc Fe E C Crashed Activity Coste Cum. Costa e ( 12,000c 6 )36,000 -73,000 15,0006 37,00022,000 ) Crashing Costs Normal Duration First Second Activity Precedes (weeks) Week Week A .......... B 12 $15,000 $20,000 B K 14 10,000 10,000 C..... D, E, F. 10 5,000 5,000 D G 17 20,000 21,000 E H 18 16,000 18,000 F I 12 12,000 15,000 G......... M 15 24,000 24,000 H......... N, P 8 I J 7 30,000 J ......... P 12 25,000 25,000 K... End 9 10,000 10,000 M End 3 N......... End 11 40,000 P.......... End 8 20,000 20,000