In flight training we used FORDEC, not surprising, it was the LH flightschool. In my first job we used DODAR (as a hun subsidiary of a Big Airline) and when we merged with another carrier we returned to FORDEC.
Quite honestly it doesn't matter which mnemonic you use, the main thing is a structured approach to decision making that includes a feedback loop. Some carriers or trainers want you do spell it out during a simulator session, and even in real life it can help to take a step back and walk through it.