Outcome Harvesting is a utilisation-focused, highly participatory tool that enables evaluators, grant makers, and managers to identify, formulate, verify, and make sense of outcomes they have influenced when relationships of cause-effect are unknown. Unlike some evaluation methods, Outcome Harvesting does not measure progress towards predetermined outcomes or objectives, but rather collects evidence of what has been achieved, and works backward to determine whether and how the project or intervention contributed to the change.