My previous company used the PIOSEE model. Problem, Information,Options, Select, Execute, Evaluate
In more recent years they took a very progressive approach toward training its use. When the course of action required was glaringly obvious, we encouraged crew to just get on with it. Where the course of action needed wasn't clear or obvious, then a structured decision making model should be used. PIOSEE was recommended but if the crew felt more comfortable with another model then that was also fine. The whole point was that the important thing was making good decisions and not the method by which that decision was arrived at.
It was also recognised that forcing the crew to use a specific model in a SIM training event where it wasn't necessary was bad practice. Essentially you are requiring a crew to use a structured model when they already know what they are going to do. Starting a decision making process with your mind already made up is just negative training.