ES EF Figure 3.17 Critical Path for Solved Problem 3.5 c 0 2 2 12 17 5 7 7 12 12 17 2 5 5 LS LF G 17 19 Start 0 19 . 17 2 0 0 Activity Name 19 End 19 Dummy Starting Activity B 0 3 D 12 12 17 19 19 0 g 3 3 12 14 3 19 9 Dummy Ending Activity Activity Duration Problem #4: Problem 3.17 in the book, but do only these questions. (20 points for the entire problem) (a) Calculate the expected Time and Variance for all activities (You don't have to show this work, you can use a spreadsheet or calculator. Just write it down on the sheet). (b) On the next page after this, draw the full network (Activity on Node style), and calculate using the Expected Time what the Critical Path is (just use the CPM method we did last week with Earliest Start, Earliest Finish, etc.) (c) Calculate the Activity Variance for the Critical Path, then also calculate the Standard Deviation for the Critical Path. (d) What is the probability of completion of the project before 42 weeks? Draw the Project Activity Network here for Problem 4(b). Problems 3.17-3.27 relate to Variability in Activity Times ... 3.17 Ross Hopkins, president of Hopkins Hospitality, has developed the tasks, durations, and predecessor relationships in the following table for building new motels. Draw the AON net- work and answer the questions that follow. TIME ESTIMATES (IN WEEKS) IMMEDIATE ACTIVITY PREDECESSOR(S) OPTIMISTIC MOST LIKELY PESSIMISTIC A 4 8 10 00 B A 2. 8 24 A 8 12 16 D A 4 6 10 E B 1 2 3 ho F EC 6 8 20 G E, C 2 3 4 a) H F N 2. 2 1 F 6 6 6 b) J D, G, H 4 6 12 c) d) K 2 N 3