  This paper aims at proposing a model representing individuals' welfare using
Sen's capability approach (CA). It is the first step of an attempt to measure
the negative impact caused by the damage at a Common on a given population's
welfare, and widely speaking, a first step into modelling collective threat.
The CA is a multidimensional representation of persons' well-beings which
account for human diversity. It has received substantial attention from
scholars from different disciplines such as philosophy, economics and social
scientist. Nevertheless, there is no empirical work that really fits the
theoretical framework. Our goal is to show that the capability approach can be
very useful for decision aiding, especially if we fill the gap between the
theory and the empirical work; thus we will propose a framework that is both
usable and a close representation of what capability is.
