PoEM 2012 — the 5th IFIP WG 8.1 Working Conference on the Practice of Enterprise Modelling — took place in November 2012 in Rostock, Germany. The focus of the PoEM conference series is on improving the understanding of the practice of EM by offering a forum for sharing experiences and knowledge between the academic community and practitioners from industry and the public sector. This proceedings present 11 papers addressing emerging topics in Enterprise Modeling.