The increasing importance of business process management forces enterprises to support their business processes at an operational level. Therefore, the adoption of process-aware information systems (PAISs) is a highly relevant and hot topic for every enterprise. The development of workow patterns has become the most important factor for comparing different workow technologies and business process modeling languages. Apart of the great success of workow patterns in the academic area, vendors of workow technologies have also adopted the patterns for their products. Despite that scientic results about the usage of workow patterns in practice are still very scarce. This book presents the outcoming of a case study investigating the occurrence of workow patterns in real-world business processes. The context of the case study was conned to the occurrence of workow control-ow patterns, service interaction patterns and workow activity patterns in the context of facility management.