Why is clinical decision making not always efficient?

Herbert Simon, an American social scientist, described, in 1947, in his book ‘Administrative Behavior’, the theory of decision-making. The main purpose of his work was to understand the cognitive and behavioral mechanisms that human beings use to make choices. Briefly, what Simon explains is that to make an efficient decision three steps are necessary: (a) to identify and list all alternatives; (b) to determine all consequences resulting from each alternative; and (c) to compare the precision and efficiency of each one of these consequences.