Categorization and Optimization of Synchronization Dependencies in Business Processes

Abstract

The current approach for modeling synchronization in business processes relies on sequencing constructs, such as sequence, parallel etc. However, sequencing constructs obfuscate the true source of dependencies in a business process. Moreover, because of the nested structure and scattered code that results from using sequencing constructs, it is hard to add or delete additional constraints without over-specifying necessary constraints or invalidating existing ones. We propose a dataflow programming approach in which dependencies are explicitly modeled to guide activity scheduling. We first give a systematic categorization of dependencies: data, control, service and cooperation. Each dimension models dependency from its own point of view. Then we show that dependencies of various kinds can be first merged and then optimized to generate a minimal dependency set, which guarantees high concurrency and minimal maintenance cost for process execution.

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