This master thesis explores the boundary resources in Dutch first line healthcare that are required in order to increase the intent of Information Systems suppliers in to join a digital platform. This is researched, as information systems suppliers lack an ability to innovate. Innovation can be increased by an open digital platform for information system suppliers as boundary resources can affect the degree of openness in a platform, which in return affects the willingness to join the platform. When more IS suppliers join a platform, the platform becomes more innovative. This is important, as in Dutch healthcare, IS needs to innovate in order to deal with tomorrows challenges. Currently, unfortunately, this is not happing. The boundary resources are evaluated by industry experts by means of a Multi Criteria Decision Analysis, using the Best-Worst Method.