What is the critical path?

What's the completion time (EF=LF) of this project?

What's the slack time of task C?

What's the cost per week to expedite task A?

What's the number of weeks may be shortened for task B?

What is the minimum completion time for the project after crashing(until no more crashing is possible)?

If we want to reduce the completion time of the project from the original length to 8 weeks, what is the minimum of the total cost(normal cost plus the crashing cost)?

Information for the Time-Cost Model (Project Crashing) Task Imme- Normal Crash Normal Crash diate Time Time Cost Cost Prede- (NT- (CT- (NC) wks) " cessors wks) (CC) Cost per #wks may week (CC- be NC)/(NT- shortened CT) (=NT-CT) A NONE 2 1 $5,000 $11,000 B A 5 3 $10,000 $20,000 C A 4 3 $6,000 $9,000 D Band C 3 2 $4,000 $8,000 Hints: the following two formats might be helpful. Calculation of Cost per Day to Expedite Each Activity ACTIVITY CC-NC CC NCNT CTNT-CT COST PER DAY TO EXPEDITE NUMBER OF DAYS ACTIVITY MAY BE SHORTENED Reducing the Project Completion Time One Day at a Time CURRENT REMAINING NUMBER COST PER DAY LEAST-COST CRITICAL OF DAYS ACTIVITY TO EXPEDITE ACTIVITY TO PATH MAY BE SHORTENED EACH ACTIVITY EXPEDITE TOTAL COST OF ALL. ACTIVITIES IN NETWORK PROJECT COMPLETION TIME 17. What's the critical path? a. ABCD B . b. AD C. AB 1. A d. CD