Idea 59: A unisex model
He who would lead must be a bridge.
Welsh proverb
Because the mental approach you must use for problem solving is so similar to the decision-making process, a single model covering them both is possible. Think of it as a bridge spanning a river.
If you are trying to cross a mountain stream, you will jump from rock to rock, zigzagging your way to the far bank. Like thinking inside your head, this is an untidy but purposeful activity.
However, when you have to get a team across a metaphorical river you need to be able to construct a simple bridge, so that everyone knows where they are in the decision making/problem-solving ...
