As well as looking at the difference a policy change or intervention has made (impact evaluation), AlphaPlus evaluates how interventions are being/have been implemented (process evaluation). This may be as part of a wider evaluation which also looks at outcomes and impact or might just focus on the input. For example, AlphaPlus undertakes process evaluations to report on the fidelity of different interventions for randomised control trials (RCTs). Our role would be to check that the interventions ‘fit’ the definition for the research project, e.g. monitoring that the difference between e-learning and face-to-face learning is maintained.