John Allspaw has claimed knowledge elicitation is a crucial skill to develop in your software company to really learn from incidents.
Ward's Reflective Interviews fit here.
Knowledge elicitation is needed because expertise hides the effort in work. See Law of Fluency.
Five Why's aspires and fails to be knowledge elicitation, at least in its common practice. John Allspaw & other resilience folks warn that especially when combined with the cultural norm of finding Root Cause the Five Why's become actively harmful—asking "why?" until you track down the "culprit" who did something wrong.
However, 3x3 Reflection is something different than its inspiration of Five Why's. In particular 3x3 Reflection emphasizes insight and the emotional experience. Moreover, the tool begins with a branch of three insights.