Project evaluation is a systematic and objective assessment of an ongoing or completed project. This definition comes from the glossary of key terms in evaluation and results-based management developed by the Development Assistance Committee (DAC) of the OECD, which has been adopted by the ILO along with most other United Nations agencies and development agencies.

The aim of evaluation is to determine the relevance and level of achievement of project objectives, development effectiveness, efficiency, impact and sustainability. Evaluations also feed lessons learned into the decision-making process of project stakeholders, including donors and national partners. Evaluation is an important part of the ILO’s accountability to its donors and to the Governing Body.