hi, well. i would like to know whether the steps of decision making process and the steps for Rational Making Process are the same thing?

Sometimes. Rationality implies value can be ascribed to risks, and outcomes. Sometimes that is hard to do.

Like: Should I marry her or not? There are a lot of intangibles in that decision, many of which do not lend themselves to rationality.

However, most folks would say the steps are the same.