Workflows are computational representations of business processes. When workflows are changed, a strategy for dealing with actual running workflow instances is needed, since workflows are typically long-running processes. As the basic strategies abort and flush are rarely applicable, hybrid workflow schemas have to be defined (transitional provisions) for the continuation of these instances. In this paper we focus on workflow evolutions where merely the order and parallelism of activities are changed and present a technique for generating a manifold of hybrid workflows based on control flow and data flow analysis.

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