The process of selection of the correct data before to decide something is not trivial, face so many unknowns, as is impossible to know for sure something before it happen or there are so many raw data/possibilities available. Maybe previous cases of decision where similar, so similar data it is taking into account. Maybe after a bad decision, some re-evaluation is needed, and then, back to select/collect new proper data.
Keyword: Methodology. Related: Deep analysis could take an eternity >>1376