"from the ETTO principle, it is never possible to maximise efficiency & thoroughness at the same time." #readingToday
The definition of the ETTO principle from Chapter 1 can be rewritten as follows: The ETTO principle refers to the fact that people (and organisations) as part of their activities frequently – or always – have to make a trade-off between the resources (time and effort) they spend on preparing an activity and the resources (time and effort) they spend on doing it. The trade-off may favour thoroughness over efficiency if safety and quality are the dominant concerns, and efficiency over thoroughness if throughput and output are the dominant concerns. It follows from the ETTO principle that it is never possible to maximise efficiency and thoroughness at the same time. Nor can an activity expect to succeed, if there is not a minimum of either.
The ETTO Principle, Erik Hollnagel