EPOS is a kernel software engineering environment, o ering integrated software con guration and process management. The EPOS process modeling PM support system runs on top of the versioned EPOSDB, operating in clientserver mode. EPOSDB o ers cooperating subdatabases workspaces for each subproject. The originality of the EPOS approach to PM exibility lies in a common, re exive, objectoriented data model to describe persistent and versioned products, activities, tools, organizational contexts, and their meta-processes. A process model or schema is a set of data types for such entities and their relationships. A PM Manager is capable of de ning and changing process models. A Planner will instantiate them into software processes. Work is going on to use roles and access rights to better control process change, and to support the full process model life-cycle by a CASE tool" for PM.