STEP 3: Define classifications and weighting factors (desktop version)

When the business objectives have been defined, the user can define a set of effects that failure of the system may have on each business objective, ranging from a low effect up to a high effect. Each company typically defines their own set. This results in a set of classifications and corresponding weighting factors and class numbers for each defined business objective.

Then a range of probabilities indicating the probability of failure for each of the failure modes will be defined for this FMECA System. AVEVA Asset Strategy Optimization uses the MTTF (Mean Time To Failure) for this.

A third dimension is to define a classification of repair durations. Including repair durations in the equation is a means to further express risk, as failures with longer repair durations are less desired than ones with short repair durations. This is defined in the desktop version.

Each factor classification is combined with a weighting factor.