During the 12th Session of the Capacity Building Committee (CBC 12), delegates requested the Secretariat to explore the use of a comprehensive and consistent evaluation model that could be applied to the WCO learning and development activities. To this end, the WCO, in consultation with its members and partners, has embarked on the development of a guide on how to evaluate WCO training and development activities, including a range of tools, templates and guidelines for carrying out the evaluation at different levels, based on a result/impact assessment approach.