PMI Project Management Professional Practice Question

The correct answer is 5 days. In the Critical Path Method, float (also known as slack) is calculated as the difference between the Late Start (LS) and the Early Start (ES) of an activity. The formula for float is:

Float = LS - ES

In this case: Float = 15 days - 10 days = 5 days

Float represents the amount of time an activity can be delayed without affecting the project's overall duration. Activities with zero float are considered critical activities and form the critical path. Understanding float is crucial for project managers as it helps in prioritizing tasks and managing schedule constraints effectively.