Extending energy value stream models by the TBS dimension - Applied on a multi product process chain in the railway industry

Energy value stream analysis is used to quickly evaluate the energetic performance of process chains within continuous improvement processes in production companies. Existing approaches focus mainly on capturing and allocation of direct energy demands induced by production machines. However, most approaches lack the holistic perspective, leading to neglect huge parts of the indirect energy demands, caused by the technical building services which are vital to maintain the production conditions. This paper presents an extended approach, targeting to fully distribute indirect energy demands upon specific entities of the value stream by presenting systematic allocation rules, which cause-dependently break down peripheral energy demands.