The participants in the ecosystem (see Ecosystem Organization) take one or several “roles” to use and supply building blocks. The RobMoSys composition structures define which parts are variable and which parts are fixed, i.e. guided by the structures to ensure composability. Each role uses dedicated views to work on models and Modeling Twin
(alphabetical order)
The figure below illustrates the roles and their corresponding activities that use or create models on each composition tier.