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Abstract:

We present a process evolution approach for process-centered environments whose enaction engine enforces constraints in the process, in the sense that a process step cannot be performed unless its prerequisites have been completed. When a user discovers a problem with the installed process model of an ongoing process, it must be changed (as opposed to ignored). The algorithm analyzes the differences between the proposed and installed process models, and detects each new constraint that would be imposed. The algorithm then generates a list of parameterized process steps that may need to be enacted in order to apply the new constraints retroactively to the existing process state reflecting the progress through the installed process. The purpose of these steps is to revise the process state, with respect to their parameters, to a point consistent with the new constraints--- but without undoing any past work. The user can decide whether to actually enact each such step, or "pretend " the step was enacted (so that a new constraint would in practice be imposed only on future work).

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