The Critical Activity Has

The critical activity has zero float.

Solution

In CPM analysis there are three types of activity based on their float.

Sub-Critical activity: Sub-critical activities are those activities that are occurring earlier than the scheduled time.

• Sub-critical activity has a positive float.
• Sub-critical activities have more than sufficient resources.

Critical activity: Critical activities are those activities that are occurring just on time.

• The critical activity has zero float.
• Critical activities have just sufficient resources.

Super Critical activity: Super critical activities are those activities that are occurring later than the scheduled time.

• Super critical activity has negative float.
• Super critical activities have less than sufficient resources.
• Super critical activities require more resources to complete on time.

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