Selecting problems of practice -- Defining and framing problems of practice ; Making intuitive theories of action explicit / Elizabeth Zumpe -- Conducting a needs assessment ; Consulting the professional knowledge base ; Becoming intellectual leaders in the co-design space / Muhua Baral -- Understanding the problem / Elizabeth Zumpe -- Understanding the change process -- Designing interventions -- Making design development research-based -- Collecting impact and process data -- Making design development studies rigorous -- Integrating action research into design development -- Implementing interventions ; Deriving design principles / John Hall.