...make a better decision model tree?
Decision making models are about one thing, and one thing only; desperate attempts by PWOCs to explain complex systems using oversimplified models. A Psychologist Without a Clue will always try to pick things apart, reduce complex situations down to separate distinct and clearly defined moments (often totally different from how they were perceived by the crew), invent fancy labels and theories and make even fancier flow charts and drawings. Thing is, it will never work that way once the brown stuff enters the fan. The only thing that has been proven to work reasonably well is what the Military and many major airlines do:
a) extensive aptitude testing b) excellent training c) experience d) more experience e) sh!tloads of luck
If you are unable to fly and think at the same time, cannot remember what the tech manual says, get easily stressed and become aggressive during pressure, all the world's decision making models will not help you. Those who excel during emergencies rarely have a clue about their decision making process, or which model tree they are using. They just do it (the "Nike Approach" - came up with that one myself just now!).
Complete your training, study you FCOM/FCTM and OMs. Be intimately familiar with your QRH (not your FO), and as you gain more experience and knowledge, you will gradually build CONFIDENCE and CAPTAINCY - which often makes a huge difference in itself. You can't change who you are, just do your best, things will usually turn out all right
