In a structured workflow system, a configurable workflow engine provides mechanisms for executing and scheduling the work items in a defined way. End users use their discretion and define their own “local” processes and “local” rules for processing work items, or deviate from predefined processes....http://www.google.de/patents/US7885847?utm_source=gb-gplus-sharePatent US7885847 - End user oriented workflow approach including structured processing of ad hoc workflows with a collaborative process engine
