Although nursing represents around half of Europe's healthcare budgets, its impact is seldom evaluated. However, given the current era of cost-containment, nursing must prove the value of its clinical effectiveness. Through European collaboration, the WISECARE project is working towards identifying the unique contribution of cancer nursing. This paper will explain the rationale and goals of the WISECARE project and demonstrate the collaborative processes involved within such a project. The latest results of the project will be presented to prove the value of collaboration in ensuring the development of European standards of nursing care.