I tend to focus on the experimental and quasi-experimental elements of programme evaluations, but most of the work we do also includes implementation and process evaluations.
This looks interesting, by Patricia Rogers and Michael Woolcock:
In this working paper for the Center for International Development at Harvard University, Patricia Rogers and Michael Woolcock argue that implementation and process evaluations serve the vital purpose of jointly promoting accountability and learning.
This focus on accountability and learning can expand evaluations’ role from external instruments of compliance to internal drivers of partnership, innovation, and improvement. Process evaluations can offer a deeper understanding of interventions, guiding informed decision-making, fostering continuous learning, and cultivating adaptable organizations and sustainable positive impacts for those served.
The paper explores six process and implementation evaluation types, highlighting their strengths and weaknesses in different contexts.
Rogers, P.J. & Woolcock, M. (2023). Process and Implementation Evaluations: A Primer. Center for International Development at Harvard University.