What is the authoritative source for METs in the air force?

The authoritative source for METs (Mission Essential Tasks) in the U.S. Air Force is the Air Force Instruction (AFI) 36-2640, "Air Force Training Program." This instruction provides guidelines for determining and validating METs necessary for mission readiness. Additionally, the Air Force's Capability-Based Assessment (CBA) process also contributes to defining and refining METs. These resources ensure that training aligns with operational needs and readiness requirements.