An interference float is defined as
- Athe amount of time by which the start of the activity may be delayed without causing a delay in the completion of the project
- Bthe amount of time by which the start of the activity may be delayed without delaying start of a following activity
- Cthe difference between total float and free floatCorrect
- Dthe amount of time by which the start of the activity may be delayed without affecting the preceding or the following activity
Solution
Concept
Interfering float
Formula
Interfering float = Total float − Free float
Step-by-step solution
1. (a) is total float. 2. (b) is free float. 3. (d) is independent float. 4. Interfering float = TF − FF.
Explanation
The part of the total float that, if used, delays the early start of following activities is the interfering float.
Why the other options are wrong
(a) total float; (b) free float; (d) independent float.
Shortcut
IF = TF − FF.
Common mistake
Choosing free float.
Correct answer: C) the difference between total float and free float