"Middle-level theory (MLT) has several uses in development planning and evaluation. It helps predict whether a programme can be expected to work in a new setting. It offers insights into what design features are needed for success. IIt provides invaluable information for monitoring to see if the programme is on track and to fix problems that arise. It reveals the causal processes and related assumptions to be tested in an evaluation and helps identify evaluation questions. It helps in interpreting evaluation findings, assessing their relevance and locating a description of them that is useful for programme design and evaluation in other settings. This CEDIL methods brief outlines ten steps for building and using a middle-level ‘causal-processtracing’ theory of change to serve these purposes." (p.1)