Before execution, the project schedule, stakeholder engagement plan, and resource plan must be
finalized. ACMP specifies these as foundational inputs ensuring clarity of timing, stakeholder
involvement, and capacity. Timelines and communications (B) or strategies (A) are useful, but
without explicit scheduling, resourcing, and engagement planning, execution may lack alignment.
Benefits analysis and sustainability (D) are addressed later. Thus, option C is the correct prerequisite
for execution.
(Reference: ACMP Standard, Process Group 3 – Develop Plan; Required plans include stakeholder
engagement, communication, resource allocation, and scheduling.)
