OK cosmetic herin after?

This commit is contained in:
Robin Clark 2013-09-18 11:49:51 +01:00
parent 7358f999d6
commit 618b88dafa
2 changed files with 5 additions and 2 deletions

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@ -224,7 +224,10 @@ failure.
With an FMMD model, all the causes of system failures With an FMMD model, all the causes of system failures
down can be traced to the base component level. down can be traced to the base component level.
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This would be enough to create a fault causation tree, but FTA introduces The DAG produced from an FMMD analysis could be considered %%% THANKS ANDREW !
as a unification of all FTA trees of a system.
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This would in fact, be enough to create all fault causation trees, but FTA introduces
concepts of operational and environmental states, and inhibit gates. concepts of operational and environmental states, and inhibit gates.
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The FMEA philosophy in relation to these three concepts are to assume that they are worst cases, that they The FMEA philosophy in relation to these three concepts are to assume that they are worst cases, that they

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@ -699,7 +699,7 @@ components, where $\abslev$ is a natural number, ($\abslev \in \mathbb{N}_0$).
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For a base component, let the abstraction level be zero. For a base component, let the abstraction level be zero.
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The symptom abstraction process is applied giving a $\derivec$, The symptom abstraction process is applied giving a $\dc$,
this derived~component will have an $\abslev$ value this derived~component will have an $\abslev$ value
one higher than the highest $\abslev$ value of any of the components one higher than the highest $\abslev$ value of any of the components
in the {\fg} used to derive it. in the {\fg} used to derive it.