Management effectiveness of heritage sites aims to protect the unique values of those sites. This can be achieved through the continuous assessment of all the managerial practices within these sites. There are various methods concerned with evaluating the management system within heritage sites, the most important of which is “Enhancing Our Heritage" (EOH) methodology. This method depends on evaluating all the managerial aspects of heritage sites. In Egypt, heritage sites are not dealt with according to this concept, especially from managerial aspects, but are dealt with in a random manner, which causes many risks and threats that affect the values of the sites and reflect negatively on tourism activity. The study aims to clarify the EOH approach and propose a model based on this approach to assess management effectiveness at heritage sites in Egypt and apply it on the Abu Mena archaeological site as one of the World Heritage Sites. The study used the qualitative approach that depends on personal interviews with officials in the archaeological site of Abu Mena. The results mentioned that the Abu Mena site suffers from many threats, the most important of which is the high level of groundwater and the lack of consistency and integration of developmental plans. The study also recommended the need to work on creating partnerships with various international and local bodies and organizations concerned with archaeological work to implement the development plans set for the Abu Mena archaeological site, with the need to determine the time frame for implementing these plans.