Defining the execution plan is the foundational step in creating a CPM schedule. This involves
understanding the project's scope of work and outlining how it will be executed to meet project
objectives.
Option A (bar chart) is a visualization step but does not address planning the sequence or scope
execution.
Option C (resources) comes later in schedule development after the scope and plan are defined.
Option D (logic diagram) is a subsequent step that relies on the execution plan.
The PSP Study Guide emphasizes scope and execution planning as critical first steps.