MyChoice is a user-friendly web-based application supporting collective decision, developed by INRAE (French National Institute of Research for Agriculture, Food and the Environment). It is designed to analyse, compare and assess the acceptability of different alternatives-e.g. technologies, food processes, variants of a product, etc.-, based on explicative arguments stemming from various sources and stakeholders, regarding different criteria and aims. It is well-suited for accompanying news trends and developments in food chains, requiring the adhesion and cooperation of various stakeholders. Nevertheless, its design is generic and may also be applied to different fields. This paper presents the design concepts of the software, stemming from different disciplines-multicriteria decision, AI argumentation, database information systems, social psychology-, its features and expected future developments.