Cmpcf Compliance Using Decision Technology

It is given that top-down modelling approaches used for deriving asset management strategies over long time horizons must take into account the effects of deterioration and interventions. Top-down models have the advantage that all combinations of decision can be considered, such that the right strategy can be selected to achieve objectives. Top-down methodologies overcome problems of data scarcity by pooling data and being able to generalise within asset groups and areas. In this way, data is effectively ‘borrowed’ from adjacent areas, poor data is overcome and deterioration is understood. Bottom-up focussed methods take areas in isolation and rely on highly accurate data. Such methods are limited to budget setting (what did we spend last year?) and prioritisation to derive schemes. However, top-down models lose certainty at the more detailed level. This is where they must link to bottom-up methodologies and tools.