Copyright © Erik Hollnagel 2016
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Work-related ETTO rules
The ETTO rules described here are based on a broad view of the general human factors literature, of studies of work, etc. The set of rules is hopefully representative, but does not assume to be exhaustive.
A combination of this rule and the preceding is clearly unhealthy, since it opens a path to failure. It happens every now and then, usually because different people are involved at different times.