.

fmmd_concept/fmmd_concept.tex

@@ -7,7 +7,7 @@
 \abstract{ 
 This paper proposes a methodology for
 creating failure mode models of safety critical systems, which
-have a common notation
+has a common notation
 for mechanical, electronic and software domains and apply an
 incremental and rigorous approach.
 
@@ -328,10 +328,14 @@ give a value for the `safety level' for the equipment in a given environment.
 %%-• The operational profile (environmental stress factors).
 
 This uses MTFF and other statisical models to determine the probability of
-failures occurring. A component failure mode, given its MTTF
+failures occurring.
+%
+A component failure mode, given its MTTF
 the probability of detecting the fault and its safety relevant validation time $\tau$,
 contributes a simple risk factor that is summed
-in to give a final risk result. Thus a statistical
+in to give a final risk result. 
+%
+Thus a statistical
 model can be implemented on a spreadsheet, where each component
 has a calculated risk, a fault detection time (if any), an estimated risk importance
 and other factors such as de-rating and environmental stress.