Systematically reviewing how a building actually performs and is used after occupants move in, and feeding those lessons back into future design and facilities decisions. A POE compares the "As Designed" intent against the "As Occupied" reality - actual energy use versus the performance simulation's prediction, occupant comfort surveys, how spaces get used differently than planned - closing the loop that Soft Landings and BS 8536 are both designed to set up from the start.