[Solved] In PERT analysis, a critical activity has: (2024)

Explanation:

Critical activity:

Critical activitiesare those activities whosefloat is zeroand they lie on thecritical path.

Float:

Relax or delay provided to any activity is known as float.

Floats are of three types. They are as follows:

Total Float (TF):

The maximum delay or relax provided to any activity without affecting the project duration.

TF = Lj– Ei– dij

Free Float (FF):

Relax or delay provided to any activity without affecting theEarliest Start Time (EST)of the successor activity.

FF = Ej– Ei– dij

Independent Float:

Relax or delay provided to any activity without affecting the Earliest Start Time(EST)of successoractivity as well as Latest Finish Time(LFT)of the predecessoractivity.

IF = Ej– Li- dij

Relation among floatTF ≥ FF ≥ IF

Important Points