This article proposes a model for assessment of peacekeeping operations. Peacekeeping operations began in 1948, under the authority of the United Nations in order to provide and sustain a peaceful environment throughout the world. International organizations such as the United Nations, the North Atlantic Treaty Organization and the African Union undertake peacekeeping operations in different geographical regions of the world. However, they lack some aspects of the assessment process. There were studies conducted previously in order to determine the principles of the assessment process of peacekeeping operations but none of them presented a comprehensive solution. Therefore, in this study, a clear, comprehensive and detailed assessment model was proposed, which may be applied in future peace operations and shed more light on the subject for future researches.