From d434799c20bc4eda8c4e3010b3b8bce414451a8f Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Sat, 30 Oct 2010 17:43:35 +0100 Subject: [PATCH] . --- lifecycle_modelling/Makefile | 3 ++- lifecycle_modelling/lifecycle_modelling.tex | 13 +++++++++++++ lifecycle_modelling/paper.tex | 2 +- symptom_ex_process/introduction.tex | 4 +++- 4 files changed, 19 insertions(+), 3 deletions(-) diff --git a/lifecycle_modelling/Makefile b/lifecycle_modelling/Makefile index ef01561..3d6209c 100644 --- a/lifecycle_modelling/Makefile +++ b/lifecycle_modelling/Makefile @@ -1,6 +1,7 @@ # - +# +# paper: paper.tex lifecycle_modelling_paper.tex #latex paper.tex diff --git a/lifecycle_modelling/lifecycle_modelling.tex b/lifecycle_modelling/lifecycle_modelling.tex index 86d9ac9..e0b1582 100644 --- a/lifecycle_modelling/lifecycle_modelling.tex +++ b/lifecycle_modelling/lifecycle_modelling.tex @@ -27,6 +27,7 @@ paper chapter } +\section{discovering a `new' failure mode in a component} Give general idea of how a new failure mode can be integrated into the model. @@ -36,3 +37,15 @@ How it will generally be limited to small sections of th FMMD tree. Give specific example, pretend a new failure mode is discovered in a SCHOTTKY diode. + +Often an electronic component will have a new failure mode `discovered' +I am using as an example a diode which has an exponential relationship +with temperature and reverse leakage current. This is +a failure mode that would not be initially considered in a design. +But when combined with high value resistors could give incorrect voltage readings in some circuits. +I how the FMMD model can have this new failure mode added and what +impact it has on the FMMD data model. + +\section{Discovering New Failure Mode behaviour ina {\dc}} + +\section{New or additional evironmental Conditions} diff --git a/lifecycle_modelling/paper.tex b/lifecycle_modelling/paper.tex index 3bcb0b8..bf05eb6 100644 --- a/lifecycle_modelling/paper.tex +++ b/lifecycle_modelling/paper.tex @@ -22,7 +22,7 @@ \author{R.P.Clark} \title{Product Lifecycle Modelling with FMMD} \maketitle -\input{life_cycle_modelling_paper} +\input{lifecycle_modelling_paper} \bibliographystyle{plain} \bibliography{../vmgbibliography,../mybib} diff --git a/symptom_ex_process/introduction.tex b/symptom_ex_process/introduction.tex index 5042f07..5a8e86c 100644 --- a/symptom_ex_process/introduction.tex +++ b/symptom_ex_process/introduction.tex @@ -32,5 +32,7 @@ of FTA \cite{nasafta} (Fault Tree Analysis) and mimimal cuts sets \cite{nucfta} Also statistical reliability/probability of failure~on~demand \cite{en61508} and MTTF (Mean Time to Failure) calculations can be produced automatically \footnote{Where component failure mode statistics are available \cite{mil1991}}. % -This chapter focuses on the process of building the blocks, the symptom extraction or abstraction process, that is key to creating an FMMD hierarchy. +This chapter focuses on the process of converting {\fgs} to {\dcs}, or building the `blocks' of the FMMD hierarchy. +We can term this stage in FMMD analysis as the `symptom extraction' process. +The symptom extraction or abstraction process, is the key process in creating an FMMD hierarchy. }