The amount of time by which the activity completion can be delayed without interfering with at ____ of succeeding activity is known as 

Explanation:

Free float: 

It is the amount of time that the activity completion time can be delayed without affecting the earliest start time of the immediate successor activities in the network.

Free Float = Total Float - Head event Slack

\({F_F} = \left( {T_E^j - T_E^i} \right) - tij\)

Free float is also equal to total float minus head event slack.

\({F_F} = {F_T} - S_j\)

which implies that free float does not affect succeeding activity but affects preceding activities.

Important Points

Total Float: 

• It is the maximum delay possible for an activity without considering any delay in its precedence or succeeding activity.

Interfering Float: 

• Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. It is given by Total float - Free float.

Independent float:

• It is the maximum delay possible for an activity that used floats of the preceding activity, but we will not affect the float of the succeeding activity.