Which type of task must be performed to achieve a specified task but is not explicitly stated?

The correct choice is the type of task that is necessary for achieving a specified objective but isn't explicitly mentioned in the orders or directives. This is known as an implied task. Implied tasks arise from the nature of the situation and are inferred from the explicit tasks that are provided. They are essential for mission success even though they may not be directly listed, illustrating their importance in military operations.

In a military context, while specified tasks are clearly outlined and assigned, implied tasks must be identified and executed to ensure all necessary components of the mission are addressed. They require critical thinking and situational awareness to determine what must be done beyond what is expressly stated in the operation order.

Identifying and understanding implied tasks is crucial for effective planning and execution within the Military Decision-Making Process (MDMP), as they often become the backbone of mission success and can prevent potential operational failures.