Consider the project network given in Figure 7.48.

a. Determine the critical path for the network when each activity is realized at its normal time.

b. Suppose the project must be completed in 15 days. Formulate a LP model that will minimize the cost of meeting the deadline.

c. Solve the model in

(b) using a LP software.

d. Generate the time–cost trade-off curve using the network flow approach.