It has become common place in business life that companies with related operations engage in a so-called merger in order to benefit from synergies or from combined products and services. In order to handle the complexity of such an endeavour, it is important to utilize a structured approach for finding similarities and contradictions in Business Process Models of both partners. In this paper, the authors present a suitable procedure for this task. Furthermore, they demonstrate how to identify those specific activities within the overall business processes which must be adapted. In particular, they discuss how such integration can be conducted if the processes of both parties are modeled with Event-driven Process Chains, one of the most popular conceptual Business Process Modeling languages.