Given in Table 9-3 are the data for a steam calender and pipeline maintenance project. Three sets of times are given under columns headed

a, m, and

b. In this problem only the first two columns will be used ; the tin}es under the column headed a are the "crash" activity performance times while those under the column headed m are the "normal" performance times.

a. Draw the network and make the basic scheduling computations using activities-on-arrows or activities-on-nodes.

b. Identify the critical path.

c. Indicate, in step-by-step detail, the activity augmentations required to reduce the project duration to 248 hours while keeping the total project direct costs at a minimum. Assume that only the normal and crash times are feasible.

d. Repeat part c using the method illustrated in Figure 9-10 by the points So, S" ... , S,.