Business process compliance has been widely addressed re-sulting in works ranging from proposing compliance patterns to check-ing and monitoring techniques. However, little attention has been paid to a specific type of constraints known as instance spanning constraints (ISC). Whereas traditional compliance rules define constraints on pro-cess models, which are checked separately for each instance, ISC impose constraints that span multiple instances. This paper focuses on ISC evo-lution and its impact on process compliance. In particular, ISC change operations, as well as change strategies are defined, and the impact on both the ISC monitoring engine and the process instances during run time are analyzed. The concepts are prototypically implemented.

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