The Fire Service uses much the same progression in moving from observation to action except it isn’t referred to as the OODA loop. Its more informal and formal decision making. If you had been to dozens of fires in structures of the same type construction then you know how the fire will behave and can move from orientation straight to action. Fires in the old Queen Ann type construction where no fire stops were used, allowing a basement fire to communicate straight up to the attic by traveling up inside the non-fire stopped walls would be an example. A more complicated structure would require more diligence and formal decision making (Decide) to identify the best course of action.