HW 5 - Sabrina Grasso PDF

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Sabrina Grasso...

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1.

a) A-F A-D-G B-G C-E-G

10 weeks 12 weeks *Critical path 10 weeks 8 weeks

b) It will take 12 weeks to complete the project without crashing c) associated cost is $61,000 for the entire project d) revise the schedule in order to complete the job within 10 weeks using the crashing method. Indicate the new cost and critical path or paths 1) Crash D, 1 week $4,000 2) Crash D, 1 week $4,000 =$8,000 $8,000 +$61,000=$69,000 2. a. To stay on schedule, I would find a new critical path and crash weeks when possible b. A-F 10 weeks A-D-G 10 weeks B-G 10 weeks C-E-G 11 weeks (with new changes) *Critical Path c. Project cost Crash G, 1 week Cost of C

$69,000 $7,000 $4,500 =$80,500

3. a. Penalty cost of $10,000 per week for every week this project is late A-F 10 weeks *Critical Path A-D-G 10 weeks *Critical Path B-G 10 weeks *Critical Path C-E-G 8 weeks With three critical paths, crashing weeks to get to 6 week schedule b. Expedite to finish in 6 weeks

A-F A-D-G B-G C-E-G

10 10 10 8

9 9 9 7

8 8 8 6

Project cost $61,000 Crash D, 2 weeks $8,000 Crash F, 2 weeks $10,000 Crash G, 2 weeks $10,000 2 weeks late penalty (10,000 each) $20,000 =$109,000

4. Probability of completing this building project in 9 weeks A-D-G Critical Path, 12 weeks A=(4-2 / 6)2 =1/9 D=(7-3 / 6)2 =4/9 G=(6-2 / 6)2 =4/9 =1 Z=9-12 / √1 = -3 Probability of completing project in 9 weeks is .00135...