An Interactive Procedure to Assess Value Functions for Environ mental Quality

In this paper a new procedure to assess value functions for environmental quality is presented. It has being particulary designed for eliciting expert-based value functions for pollutant substances. The main features of the model are the possibility to integrate direct and indirect assessment techniques, the possibility to make explicit assessment uncertainties and the ability to avoid forced quantitative judgements. The main aim of the procedure is to improve the reliability of the assessment but also to make the expert's task easier by using qualitative judgements more frequently. The procedure is here presented with an application for soil pollution.