Productive collaborations between industrials and various societal actors, specially users or citizens, involved in an innovation process to develop new values (concepts, solutions, products, services…). Depending on the context, societal actors can take over some of the activities of production, add value to product development by sharing their experiences with the use of the product and services or they can be actively involved from the start of the development process by co-developing priorities, expectations and concerns in the innovation trajectory.