Float/Slack 9 / 16

Float / Slack is spare time in an activity.

The difference between the EET and the LET in a project network analysis is known as float.

Activities on the critical path contain no float.

How to calculate float if we know the LET of the following event?

  1. Find the activity that you want to calculate float for.

  2. Find the immediate event following that activity.

  3. Find the LET of that event.

  4. LET - time for activity = float

When EET, LET, and total time needed for the work are given, float is calculated as follows:

  1. Find the total time allowed for the work

    LET - EET = Total time allowed for the work

  2. Find the float

    Float = Total time allowed for the work - Total time needed for the work

We use cookies to help make our website better. We'll assume you're OK with this if you continue. You can change your Cookie Settings any time.

Cookie SettingsAccept