Which of the following is a component of a military operation plan (OPLAN)?

A military operation plan (OPLAN) serves as a comprehensive framework for planning and executing military operations. The situation component is crucial as it assesses and describes the operational environment, including the enemy's capabilities, terrain analysis, friendly forces, and other relevant factors. This situational understanding enables commanders to make informed decisions about the course of action.

In contrast, while a logistics overview, personnel roster, and equipment inventory are certainly important aspects of military operations, they serve more specific roles within the broader context of an OPLAN. The logistics overview focuses on support and supply chains, a personnel roster lists the assigned individuals for the operation, and an equipment inventory records the assets available for missions. Each of these components supports the execution of the plan but does not encapsulate the comprehensive situational analysis that is foundational to an effective OPLAN.