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system theoretic process analysis.md
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- [[push]] [[stpa]] - [[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. - 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.
- 4 [[steps]] - 4 [[steps]]
- define the purpose of the analysis, including [[scope]], [[losses]], [[hazards]], - define the purpose of the analysis, including [[scope]], [[losses]], [[hazards]], [[constraints]] (optionally derived also from [[sub hazards]]).
- model the control structurs - model the control structure
- step one - step one: define the purpose of the analysis
- start with the [[losses]], which involve something of value to stakeholders - start with the [[losses]], which involve something of value to stakeholders
- continue by defining the scope of the system - continue by defining the scope of the system
- find [[hazards]], which are systemic states or conditions to be prevented, and which together with (worst-case) environmental conditions lead to [[losses]]. - find [[hazards]], which are systemic states or conditions to be prevented, and which together with (worst-case) environmental conditions lead to [[losses]].