The Feinstein International Center has been developing and adapting participatory approaches to measure the impact of livelihoods based interventions since the early nineties. Drawing upon this experience, this guide aims to provide practitioners with a broad framework for carrying out project level Participatory Impact Assessments (PIA) of livelihoods interventions in the humanitarian sector. Other than in some health, nutrition, and water interventions in which indicators of project performance should relate to international standards, for many interventions there are no ˜gold standards' for measuring project impact. For example, the Sphere handbook has no clear standards for food security or livelihoods interventions. This guide aims to bridge this gap by outlining a tried and tested approach to measuring the impact of livelihoods projects. The guide does not attempt to provide a set of standards or indicators or blueprint for impact assessment, but a broad and flexible framework which can be adapted to different contexts and project interventions. "