time-and-motion analysis of technical thinking, jcr licklider, 1960.

In the spring and summer of 1957, therefore, I tried to keep track of what one moderately technical person actually did during the hours he regarded as devoted to work ... About 85 per cent of my "thinking" time was spent getting into a position to think, to make a decision, to learn something I needed to know.

what do programmers and nurses have in common? listening to dave thomas and discussing the dreyfus model of skill acquisition: the end of the knowledge worker