Demand rate 120 units per hour Lead Time 20 hours Container capacity 20 units

Demand rate 120 units per hour lead time 20 hours

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CH 14 P#1 1.Consider the following project activities: A)Draw the project network diagram.ActivityDuration(days)predecessorsA1NoneB2NoneC1.5NoneD3A,BE2.5CF1.5D,EG4FH2F E S Act EF LS Dur LF 0 A 3 3 C 5 5 E 7.5 8 G 1 2 0 3 3 d p 3.5 2 5.5 dp 5.5 2.5 8 dp 8 4 1 2 0 B 2 d p 3 D 4.5 dp 4.5 F 8 1 2 3 3 1.5 4.5 4.5 3.5 8 critical path - ES/EF/LS/LF are the same Forward Pass (take larger amt) Backward Pass (take smaller amt) dp = decision point G, 4 F, 3.5 E, 2.5 D, 1.5 C, 6 B, 2 A, 3
b)Identify all the paths through the network and their lengths. C-Identify all the critical activities and paths. How long will the entire project take? Paths: Length: A-C-E- G 15.5 A-D-E- G 11 A-D-F- G 12 Critical Path 3+6+2.5+4= 15.5 B-D-E- G 10 B-D-F- G 11D-Management would like to complete the project in less than 12days. Management has determined that activity C can be crashed 4 weeks, for a total cost of $10,000. No other activities can be crashed. Will crashing activity C meet management’s goal of less than 12 weeks? Why or why not? ACTIVI TY DURATIO N (DAYS) PREDECESSORS ES EF LS LF CRITIC AL A 3 Non e 0 3 0 3 YES B 2 Non e 0 2 4.5 6.5 C 6 A 3 9 3 9 YES D 1.5 A B 3 4.5 6.5 8 E 2.5 C D 9 11.5 9 11.5 YES F 3.5 D 4.5 8 8 11.5 G 4 E F 11.5 15.5 11.5 15.5 YES
0 A 3 3 C 5 5 E 7.5 8 G 12 0 3 3 d p 3.5 2 5.5 d p 5.5 2.5 8 d p 8 4 12 0 B 2 d p 3 D 4.5 d p 4.5 F 8 1 2 3 3 1.5 4.5 4.5 3.5 8 critical path - ES/EF/LS/LF are the same crashing activity C after 6 days will only reduce the time to 12 days therefore not being able to accomplish the project in LESS than 12 days

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