Computing a global performance index by fuzzy set approach

This paper introduces a new methodology for analyzing and computing the overall hydraulic performance for each single component in the network and for the whole water distribution system. Water required and supplied, are considered as the main asset to carry out the hydraulic analysis. The methodology is based on hierarchical system approach that begins by evaluating the hydraulic performance through a set of three indicators that are reliability, resiliency, and vulnerability. Then the Analytic Hierarchy Process (AHP) is being used in order to assign weight for each indicator. Finally, fuzzy logic technique is applied which allows the aggregation of all previous indicators into one single index that depict the system condition whether is poor, good or somewhere in between.