"[...] the purpose of [this guide] is to support managers and commissioners of impact evaluations to better manage the entire process from drawing up terms of reference, selecting contractors, steering evaluations and utilising evaluation results. The guide also argues that relying only on traditional approaches to IE does not fit well with the kind of customised, complex, locally engaged and often sensitive programmes that non-governmental organisations (NGOs) and civil society organisations (CSOs) undertake. A broader range of designs and methods are needed." (Introduction, page 3)