The promise of Service-oriented Enterprise Resource Planning Systems is to allow for a fine-grained alignment of IT with the specific functional requirements of an organization’s business processes. Recent publications suggest that the implementation and configuration of service-oriented ERP systems are pre-dominantly coordinated by means of market-based transactions, since services are supposed to be offered via service marketplaces. However, emphasizing the significance of business processes as a starting point for any service-oriented information system implementation, we suggest that the implementation process surprisingly demands an even higher degree of hierarchical coordination compared to conventional ERP system implementations.