Handbook of Reliability, Availability, Maintainability and Safety in Engineering Design - Part 81 studies the combination of various methods of designing for reliability, availability, maintainability and safety, as well as the latest techniques in probability and possibility modelling, mathematical algorithmic modelling, evolutionary algorithmic modelling, symbolic logic modelling, artificial intelligence modelling, and object-oriented computer modelling, in a logically structured approach to determining the integrity of engineering design. . | 784 5 Safety and Risk in Engineering Design The conditions description set di9 can be represented by the set of input variables IV9 iv1 . ivn where d 9 conditions description data object with IV9 function description failure description failure effects failure consequences failure causes failure mode description failure frequency restoration tasks description procedure description maintainability etc. . The conditions failure output variable set do7 can be represented by the set of output variables OV7 ov1 . ovm where do7 is the conditions failure data object with OV7 failure severity probability of consequence failure risk failure criticality failure downtime restoration downtime availability etc. . Let Ks4 be the design assessment module. This knowledge source makes use of the six global data object inputs di1 di2 ds di4 di5 and di6 as well as a design specification set di10 and computes a design criteria output variable set do8. The design specification set di10 can be represented by the set of following input variables IVio iv1 . ivn where di10 design specification data object with IV10 mass volume capacity circulation agitation fluids solids consumption heat input energy input etc. . The design criteria output variable set do8 can be represented by the set of output variables OV8 ov1 . ovm where do8 is the design criteria data object with OV8 efficiency flow precipitation throughput output pressure viscosity absorption temperature losses etc. . Let Ks5 be the hazardous operations HazOp assessment module. This knowledge source makes use of the six global data object inputs di1 dl2 di3 d4 di5 and di6 as well as the operational hazards set dm and computes an operational risk output variable set do9. The operational hazards set di11 can be represented by the set of input variables IV11 iv1 . ivn where di11 operational hazards data object with IV11 efficiency rating flow rating throughput rating output rating pressure rating temperature rating design torque design
