The organisations involved in development of the TPT are in an enviable position of being able to develop common units and modules that could be applied in different national contexts and map them directly against ECVET criteria. ECVET is a European system of accumulation and transfer of credits designed for vocational education and training in Europe. It enables the attesting and recording of the learning achievements / learning outcomes of individuals engaged in on learning pathways leading to a vocational qualification, including the documentation, validation and recognition of achieved learning outcomes acquired in different countries, in both formal VET or in non-formal contexts. ECVET is designed to operate at the European level, interfacing with national systems and arrangements for credit accumulation and transfer. Normally, the issue of compatibility will be one of examining how units or modules achieved in one national context could be mapped against each other and the ECVET criteria. So if the TPT can inform cross-national unit development this should help us understand issues around the most appropriate level of aggregation of tasks to interface with the ECVET system.