In its simplest form, what is the main drawback of critical path method scheduling?

A fundamental limitation of Critical Path Method (CPM) scheduling is its assumption of unlimited resources, meaning it does not account for resource constraints when calculating schedules.

Option A (backward pass) is a standard part of the CPM process.

Option C is incorrect as CPM considers activity dependencies.

Option D refers to flexibility in diagramming methods, not a drawback.

The PSP Study Guide highlights resource constraints as a significant challenge in CPM application​​.