1) A PERT problem is detailed in the table below. Times are given in weeks.
Activity 
Preceding 
Optimistic Time 
Probable Time 
Pessimistic Time 
A 
 
4 
6 
11 
B 
A 
5 
9 
13 
C 
A 
3 
7 
14 
D 
B, C 
8 
10 
12 
E 
C 
6 
7 
9 
F 
C 
4 
6 
8 
G 
E 
5 
5 
8 
H 
E, F 
8 
10 
16 
I 
D, G, H 
6 
12 
14 
a. Draw a network diagram using the AOA approach and identify all paths of the project.
b. What is the expected completion time of the project?
c. What are the project variance and the project standard deviation?
d. Determine all possible paths. Which path is critical?
e. Determine the probability that the project is completed within 48 weeks, assuming that the path
identified in (b) is critical.
(Hint: Use dummy activities.)
2) Nick Dunbun, the owner of Huntington Steel Co., currently has five jobs to be scheduled, shown in the order in which they arrived. Show your supporting calculations in detail.
Job 
Processing Time (hours) 
Due (hours) 
V 
28 
58 
W 
15 
50 
X 
60 
95 
Y 
22 
40 
Z 
70 
120 
a. Which dispatching rule has the best score for flow time?
b. Which dispatching rule has the best score for workinprocess (jobs in the system)?
c. Which dispatching rule has the best score for lateness?
d. What dispatching rule would you select? Support your decision.
e. Complete the following table.
Dispatching Rule 
Job Sequence 
Average Flow Time 
Average Number of Jobs 
Average Lateness 
FCFS 




SPT 




EDD 




CR 




Please summarize your stepbystep results in MS WORD file format
Subject  Business 
Due By (Pacific Time)  4/10/2013 
Tutor  Rating 

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