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Calculate the expected time for each activity

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Reference no: EM131849649

Question 1: A network consists of the activities in the following list. Times are given in weeks.

Activity

Preceding

Time

A

--

8

B

--

3

C

A

7

D

A, B

3

E

C

4

F

D

6

a. Draw the network diagram.

b. Calculate the ES, EF, LS, LF, and Slack for each activity.

Task

Early Start

Early Finish

Late Start

Late Finish

Slack

A

 

 

 

 

 

B

 

 

 

 

 

C

 

 

 

 

 

D

 

 

 

 

 

E

 

 

 

 

 

F

 

 

 

 

 

c. What is project completion time?

Question 2: A partially solved PERT problem is detailed in the table below. Times are given in weeks.

Activity

Preceding

Optimistic Time

Probable Time

Pessimistic Time

Expected Time

Variance

A

--

7

9

14

 

1.361

B

A

2

2

8

 

0

C

A

8

12

16

 

0

D

A

3

5

10

 

1.361

E

B

4

6

8

 

0

F

B

6

8

10

 

0

G

C, F

2

3

4

 

0

H

D

2

2

8

 

1.000

I

H

6

8

16

 

2.778

J

G, I

4

6

14

 

2.778

K

E, J

2

2

5

 

0.250

a. Calculate the expected time for each activity. Enter these values in the appropriate column in the table above.

b. Which activities form the critical path?

c. What is the estimated time of the critical path?

d. What are the project variance and the project standard deviation?

e. What is the probability of completion of the project before week 40?

Reference no: EM131849649

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