(Time Estimate and Float)

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1.         Information on the activities required for a project is as follows :

Activity :

1 – 2

1 – 3

1 – 4

2 – 5

3 – 5

3 – 6

3 – 7

4 – 6

5 – 7

6 – 8

7 – 8

Duration (days) :

2

7

8

3

6

10

4

6

2

5

6

 

2.         A small assembly plant assembles PC’s through 9 interlinked activities. The time duration for which is given below :

Activity :

1 – 2

1 – 3

1 – 4

2 – 5

3 – 6

3 – 7

4 – 6

5 – 8

6 – 9

7 – 8

8 – 9

Duration (hrs.) :

2

2

1

4

8

5

3

1

5

4

3

 

3.         A small assembly plant assembles PCs through 9 interlinked activities, the time duration for which is given below :

Activity

1 – 2

1 – 3

1 – 4

2 – 5

3 – 6

3 – 7

4 – 6

5 – 8

6 – 9

7 – 8

8 – 9

Duration (hrs) :

2

2

1

4

8

5

3

1

5

4

3

a)      Draw a network diagram for it and calculate and tabulate for each activity: ES, EF, LS and LF times.

b)      Find the critical and sub critical paths. Calculate and tabulate all Float.

          (Oct. 03)

4.         Following are the details of estimated times of activities for a certain project.

Activity

A

B

C

D

E

F

Immediate Predecessor /Activity

A

A

B, C

E

Estimated Time (Weeks)

2

3

4

6

2

8

(a)     Find the critical path and expected time of the project.

(b)     Calculate the earliest start time, earliest finish time and slack for each activity.

(April 2004)  

5.

Activity :

1 – 2

1 – 3

1 – 4

2 – 5

3 – 5

3 – 6

3 – 7

4 – 6

5 – 7

6 – 8

7 – 8

Duration :

2

7

8

3

6

10

4

6

2

5

6

From the following table determine and calculate all the floats, ES, EF, LS, LF

 (Oct. 2005)

 

6.         Activities involved in a small project are given below along with relevant information.

Activity :

1 – 2

1 – 3

2 – 3

2 – 4

3 – 4

4 – 5

Duration :

20

25

10

12

6

10

(a)     Construct the network and find the critical path

(b)     Find and tabulate ES,EF,LF,LS, TF, Interfering float                         (April 2009)

 

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