The French project OpenPaaS aims to support collaborative process by first deducing the process from the collaboration objectives and then orchestrating it. In order to design the process, a functional matching is established in order to find which sets of organizations are able to fulfil the objectives. Then a non-functional selection has to be executed in order to find the “best” process, with the most adapted partners. This paper presents a framework that has been settled for evaluating the organizations through non-functional criteria. Based on various cases of partner selection, this framework is intended to be the most exhaustive possible: it should allow the system to evaluate organization as a human would do in the case of a request for proposal. A structure of framework is first proposed, that fits with the OpenPaaS utilization. Then, non-functional criteria are classified according to it.