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Expert-verified Found in: Page 100 ### Operations And Supply Chain Management

Book edition 14th
Author(s) F. Robert Jacobs
Pages 800 pages
ISBN 9780078024023

# The following activities are part of a project to be scheduled using CPM:ActivityImmediate PredecessorTime (Weeks)A_6BA3CA7DC2EB,D4FD3GE,F7

The critical route is discovered by estimating the time it takes to complete activities from start to finish or the maximum duration of dependent activities.

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## Determine the ES, EF, LS, as well as LF for every activity using the formulas given below

The ES of activity A will be a zero. A's EF is determined by combining its time of the tasks (6) as well as ES (0)

As a result, A's EF would be 6+0=6

The ES of task A would become the ES of the activity that follows it. Another ES, as well as EF, are derived in the same way.

## If an activity is following two other tasks with differing EF values, its ES will become the greater of the two.

For activity E, whose predecessors are B as well as D, ES will become the largest of EF of both B as well as D. Since the EF of B is 9, as well as the D, is 15, the ES of E seems to be 15.

## The EF of the network's most recent activity will be its LF.

The LS is measured by subtraction of activity duration from LF.

## If an activity is preceded by two activities, choose the one with the lowest score.

Use the given principles to determine the ES, EF, LS, as well as LF levels for the following project activities:  Determine the value of slack using the formula given below:

Slack = LS – ES

The value of slack is calculated given below:  ### Want to see more solutions like these? 