The MILOS system supports software development processes over the Internet. It integrates process modeling with project planning and enactment. Our flexible workflow engine allows refining and changing process models during project execution. The built-in traceability component supports change notifications and helps the project participants to ensure that the project plan as well as the state of the enactment engine reflect the “real world“ development process. Tool integration is accomplished by using the built-in capabilities of Web browsers. Keywords Process support, Internet, flexible workflow, change notification, traceability