Over the last ten years Business Process Management (BPM) has advanced to one of the most sustainable management approaches. BPM now covers organisational, cultural and IT-related methodologies and solutions leading to a wide variety of BPM adoptions. This paper proposes a BPM Maturity (BPMM) model, which provides a framework for the detailed evaluation of BPM capabilities and achievements. This BPMM model has been applied in two case studies, which confirmed its understandability, relevance and applicability. Future work in this area seeks the establishment of a global standard for the measurement of BPM maturity, the development of a tool-based assessment kit, and the application of this model in international case studies.