As far as the size is concerned, Alsace is a small region that includes two departments: the Haut-Rhin and the Bas-Rhin. During decades, it was considered as a wealth region which economical and employment results were always among the most performing of France. Nevertheless, the economic recession a struck this area and the economic and institutional actors had to make an inventory of a territory that is apparently very homogeneous but extremely diversified as concerning its ability to intervene on the local development as concerning the applicants for work's accompaniment. I will explain the step that allowed constituting a strong partnership around the concept of employment basin, as a relevant intervention zone.