Question

In CPM method of network analysis the Critical activities are associated with

• A. Maximum Float
• B. Minimum Float
• C. Negative Float
• D. Zero Float

Hint:

The name says it all: the activity is "critical" precisely because it has no "float" or leeway.
It must start and end on time to avoid delaying the project.
Critical Path = Longest Path = Path of Zero Float.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks about a defining characteristic of "critical activities" within the Critical Path Method (CPM) of project management.

Step 2: Detailed Explanation:
-

Float (or Slack): In network analysis, float is the amount of time that an activity can be delayed without causing a delay to the overall project completion time.
-

Critical Path: This is the sequence of activities in a project network that determines the longest path from start to finish.
The length of the critical path is the shortest possible duration for the entire project.
-

Critical Activities: These are the activities that lie on the critical path.
Because these activities are on the longest path, they have no room for delay.
Any delay in a critical activity will directly delay the completion of the entire project.
Therefore, by definition, critical activities have a float of

zero.
Non-critical activities have a positive float, meaning they can be delayed to some extent without affecting the project deadline.

Step 3: Final Answer:
Critical activities are associated with zero float.
This corresponds to option (D).