We describe two models for federating process-centered environments (PCEs): homogeneous federation among distinct instances of the same environment framework enacting the same or different process models, and heterogeneous federation among diverse process enactment systems. We identify the requirements and consider possible architectures for each model, although we concentrate primarily on the homogeneous case. The bulk of the paper presents our choice of architecture, and corresponding infrastructure, for homogeneous federation among Marvel environment instances as realized in the Oz system. We briefly consider how a single Marvel environment, or an Oz federation of Marvel environments, might be integrated into a heterogeneous federation based on ProcessWall's facilities for interoperating PCEs. Keywords: Collaborative work, Distributed system, Enterprise-wide environment, Geographical distribution, Internet, Process interoperability, Software process, Workflow management c fl1997...

We describe two models for federating process-centered environments, homogeneous federation where the interoperability is among distinct process models enacted by different copies of the same system and heterogeneous federation with interoperability among distinct process enactment systems. We identify the requirements and possible architectures for each model. The bulk of the paper presents the specific architecture and infrastructure for homogeneous federation we realized in the Oz system. We briefly consider how Oz might be integrated into a heterogeneous federation to serve as one of its interoperating PCEs. Keywords: Collaborative work, Distributed system, Enterprise-wide process, Geographical distribution, Internet, Software process, Workflow management c fl1996, Israel Z. Ben-Shaul and Gail E. Kaiser This paper is based on work sponsored in part by Advanced Research Project Agency under ARPA Order B128 monitoredby Air Force Rome Lab F30602-94-C-0197, in part by National Science...