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An Event-driven Process Chain (EPC) is a type of flowchart used for business process modelling. EPCs can be used for configuring an enterprise resource planning (ERP) implementation,〔Bart-Jan Hommes (2004). ''(The Evaluation of Business Process Modeling Techniques )''. TU Delft. p.137.〕 and for business process improvement. Usage for control of work share with instances of autonomous workflows in workflow management is possible, but not yet implemented. The event-driven process chain method was developed within the framework of Architecture of Integrated Information Systems (ARIS) by August-Wilhelm Scheer at the Institut für Wirtschaftsinformatik, Universität des Saarlandes (Institute for Business Information Systems at the University of Saarland) in the early 1990s.〔A.-W. Scheer (2002). ''ARIS. Vom Geschäftsprozess zum Anwendungssystem''. Springer. p.20.〕 == Overview == Businesses use event-driven process chain diagrams to lay out business process workflows, originally in conjunction with SAP R/3 modeling, but now more widely. It is used by many companies for modeling, analyzing, and redesigning business processes. The Event-driven process chain method was developed within the framework of Architecture of Integrated Information Systems (ARIS). As such it forms the core technique for modeling in ARIS, which serves to link the different views in the so-called control view. To quote from a 2006 publication on Event-driven Process Chains:〔Anni Tsai et al. (2006). "EPC Workflow Model to WIFA Model Conversion". In: ''2006 IEEE International Conference on Systems, Man, and Cybernetics, Taipei, Taiwan'', pp. 2758-2763]〕 :''An Event-driven process chain (EPC) is an ordered graph of events and functions. It provides various connectors that allow alternative and parallel execution of processes. Furthermore it is specified by the usages of logical operators, such as OR, AND, and XOR. A major strength of EPC is claimed to be its simplicity and easy-to-understand notation. This makes EPC a widely acceptable technique to denote business processes.'' The statement that event-driven process chains are ordered graphs is also found in other directed graphs for which no explicit node ordering is provided. No restrictions actually appear to exist on the possible structure of EPCs, but nontrivial structures involving parallelism have ill-defined execution semantics; in this respect they resemble UML activity diagrams. Several scientific articles are devoted to providing well-defined execution semantics for general Event-driven Process Chains.〔Wil van der Aalst (1999). (''Formalization and Verification of Event-driven Process Chains'' ). In ''Information & Software Technology 41(10)'', pp. 639-650〕〔Kees van Hee et al. (2006). ("Colored Petri Nets to Verify Extended Event-Driven Process Chains" ). In ''Proc. of the 4th Workshop on Modelling, Simulation, Verification and Validation of Enterprise Information Systems (MSVVEIS06)'', May 23–24, 2006 Paphos, Cyprus, pp. 76-85.〕 One particular issue is that EPCs require non-local semantics,〔Ekkart Kindler (2006). (''On the Semantics of EPCs: A Framework for Resolving the Vicious Circle'' ). Technical Report. Computer Science Department, University of Paderborn, Germany.〕 i.e., the execution behavior of a particular node within an EPC may depend on the state of other parts of the EPC, arbitrarily far away. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Event-driven process chain」の詳細全文を読む スポンサード リンク
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