Question

From the following calculate CPM in days:
Activity: 1-2 2-3 2-4 3-5 4-6 5-6
Duration : 4 4 3 3 1 2
a) 13 days
None of these
b) 8 days c) 11 days d) none of above​

Answer 1

Answer:

Critical Path Method (CPM) is a project schedule modeling technique. Mr. Morgan R. Walker and James E. Kelly developed this technique in the late 1950s.

Project planners use this method to develop schedules for many kinds of projects including IT, research, and construction.

Critical Path Method is a lengthy and complex concept. Please follow each step in this blog post and don’t move on until you understand the previous steps. If you follow this advice and complete the blog post, you won’t have any problems solving the questions on Critical Path Method.

Explanation:

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Answer 2

Answer:

The correct answer in CPM in days is (d) None of above.

Explanation:

Given that:

Activity 1-2    1-6      2-3      2-4     3-5     4-5       6-7          5-8     7-8

Duration

(in days)  7      6       14         5         11         7             11         4         18

To find:

The network and to calculate the earliest start time,

earliest finish time, the latest start time, latest finish time of each activity

by determining the critical path of the project and duration to complete the project =?

Solution:

Let the Forward pass:

We are going to find the value in ascending order:

E1 = 0

E2 = 0 + 7 = 7

E3 = 7 + 14 = 21

E4 = 7 + 5 = 12

E5 = (21 + 11) (or) (2 + 7) = 32

E6 = 0 + 6 = 6

E7 = 6 + 11 = 17

E8 = 32 + 4 = 36

Let the Backward pass:

We are going to find the value in descending order:

L8 = 36

L7 = 36 – 18 = 18

L6 = 18 – 11 = 7

L5 = 35 – 4 = 31

L4 = 32 – 7 = 25

L3 = 32 – 11 = 21

L2 = (21 – 14) (or) (25 – 5)

L2 = 7 L1 = 7 – 7 = 0 (the value will be minimum)

Therefore, the critical path is 1-2-3-5-8 and the time to complete is 36 .

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