Which factor is NOT part of the MET-TSL framework?

The MET-TSL framework is a critical tool used in military operations and planning, consisting of several key components that help assess and determine the requirements for successful mission execution. Within this framework, MET stands for Mission, Enemy, and Terrain, each representing essential factors that influence operational effectiveness.

Mission refers to the specific goals and objectives that need to be accomplished during an operation. Enemy includes all relevant information about hostile forces that could impact the operation, such as their capabilities, strengths, and weaknesses. Terrain encompasses the physical features of the operational area and how they might affect both friendly and enemy movements.

While "environment" can certainly play a role in military considerations, it is not specifically listed as a fundamental part of the MET-TSL framework. Instead, the focus is on the mission, enemy, and terrain, which are directly tied to planning and execution of operations. Thus, the factor that does not belong to the MET-TSL framework is the environment.