Methods for the evaluation and synthesis of multiple sources of information applied to nuclear computer codes

This work is devoted to methods used to evaluate and synthesize information given by multiple sources about a variable which true value is not precisely known. We first recall probabilistic and possibilistic approaches to solve the problem. Each approach offers a formal setting to evaluate, synthesize and analyze information coming from multiple sources. They are then applied to the results of uncertainty studies performed in the framework of BEMUSE project.