In this part of the eteam Project a general evaluation of the models' concepts was conducted. This included the tools ECETOC TRA (version 2 and 3), MEASE (version 1.02.01), the EMKG-EXPO-TOOL, STOFFENMANAGER® (version 4.5) and RISKOFDERM (version 2.1), but also EASE (version 2), which has been used as a basis during the development of ECETOC TRA and MEASE. In the course of the conceptual evaluation each tool was described concerning design, functionalities and structure of use. Model development and background information were summarised as far as publicly available. The model algorithms were analysed and explained including underlying data and principles. In addition information about the models' scope was collected.

The results of this evaluation were used to develop an applicability matrix. This applicability matrix is intended to help model users to choose the appropriate tool for their purpose that is able to describe an exposure situation in a sufficiently detailed way by offering necessary parameters whose scope includes the assessed situation. In addition, a use map was derived that can be used to convert different use description parameters into each other. This use map will therefore help model users to do exposure assessments with different models in a correct and consistent way. Overall, the conceptual evaluation was not used to prioritise the evaluated models, as model concepts, scopes and backgrounds are mostly too different to be compared in a direct way. However, the outcomes of this work package give users the possibility to compare different tools concerning scope and use and serve as a basis for other parts of the project where detailed knowledge of the model algorithms is needed.