Page 221 - BA1 Integrated Workbook STUDENT 2018

Project management tools and techniques

3.4 Reading the network diagram

 The EET and LET of the final node will always be the same and this will equal
the overall duration of the project.

 We can also identify the critical path, i.e. the activities where any delay will
lead to a delay in the overall project. These are the activities for which EET =
LET.

 Some activities could increase in duration and yet the project could still be
completed by the target date. Such activities are said to exhibit 'float'. Float can
generally be calculated as the difference between the LET and the EET.

3.5 Illustration

Consider the following details about a project:

Activity Duration (weeks) Preceding activity

A 8 –

B 10 A

C 6 –

D 4 C

E 8 B, D

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