This paper outlines a tool meant to strip back the process of changing a market actors' behaviour to its essential elements, or ‘building blocks’ to better understand what is actually happening when interventions work. The four building blocks relate to a changed behaviour, a rationale for it, blockers stopping the change as well as change resources (i.e. what a programme has at its disposal to promote a desired change). It is meant to apply in any situation where one is trying to get someone to do something differently.
It was designed for application to complex change processes for MSD programmes but has not been widely used in the field as of yet.