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system theoretic process analysis.md
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- by [[nancy leveson]] and [[john thomas]]
- [[pull]] [[stpa handbook]] [[stpa workshop]]
- [[push]] [[stpa]]
- I love how STPA defers key steps to a later stage so they can be done systemically, once partial but complete initial modeling has taken place.
- can be applied recursively
- i love how STPA defers key steps to a later stage so they can be done systemically, once partial but complete initial modeling has taken place.
- can be applied recursively.
- 4 [[steps]]
- define the purpose of the analysis, including [[losses]], [[scope]], [[hazards]], [[constraints]] (optionally derived also from [[sub hazards]]).
- model the control structure
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- find [[system level constraints]].
- they can look like [[hazards]], inverted.
- or define how the system must [[minimize losses]] in case the hazards occur.
- find [[sub hazards]], which
- optionally find [[sub hazards]], which might also help define further constraints