Question:-
What is the additional time available for the performance of an activity in PERT and CPM calculated on the basis that all activities will start at their earliest start time, called?
Option (A)
Slack
Option (B)
Total float
Option(C)
Free float
Option(D)
Independent float
Correct Option:
(C)
Question Solution:

Ei = Earliest start time
Ej = Earliest finish time
Li = Latest start time
Lj = Latest finish time
Dij = Time of Activity
Total Float (T.F) = (Lj-Ei)-Dij
Free Float (F.F) = (Ej - Ei)-Dij
Independent Float (I.F.) = (Ej-Li)-Dij
Tail Slack = Li - Ei
Head Slack = Lj - Ei
question-answer-faq-8896