Sewer asset management: fusion of performance indicators into decision criteria

Pascal Le Gauffre (1) , Mazen Ibrahim (1) , Frederic Cherqui (1)

1 LGCIE - Laboratoire de Génie Civil et d'Ingénierie Environnementale

Within the RERAU methodology, each rehabilitation criterion is assigned a grade out of 4 possible ones. This grade results from successive aggregations of performance indicators. Issues related to base data (uncertain or imprecise data) and to fusion (conflicting or reinforcing indicators) lead to envisage a fuzzy method for processing the proposed set of performance indicators. Five issues are discussed in this paper: representing an indicator with fuzzy linguistic variables; representing each aggregation table with “if... then...” rules; combining two premises of a rule; fuzzy representation of the implication; aggregating the results of several rules.

Mots clés: Sewer; Indicator; Aggregation; Fuzzy sets; Rehabilitation; Visual inspection; INDIGAU

Domaines: Autre

Pascal Le Gauffre, Mazen Ibrahim, Frederic Cherqui. Sewer asset management: fusion of performance indicators into decision criteria. Performance Assessment of urban infrastructure services, Mar 2008, Valencia, Spain. 523 p. ⟨hal-00393155⟩