The event-controlled process chain (EPK) is a substantial element of the ARIS concept. It was developed 1992 by Professor Scheer at the university of the Saarland in Saarbruecken. EPK plot working processes in a semiformalen modelling language. Thus operational procedures are to be systematized and parallelisiert, in order to be able to save time and money. In addition objects in arranged graphs are connected with linkage lines and - arrows in a 1:1 - allocation (exception when logic functions). In such a linkage chain the objects alternate in their meaning between event and function, i.e. they form an alternating consequence, which leads to a bipartiten graph. Each function can be connected additionally with an information object, be loaded from that information or stored into information.

Basic elements and - regulate

EPKs consist of three basic elements:

• Events
  • is precondition of functions
  • can the result from functions be
  • Example: "“Order is accepted"”
  • Events are without times and costs, them can however (after linkages) probabilities of entrance be assigned
  • diagram by 6-Ecke (see diagram)
• Functions
  • represent activities (- > procedures, processes, subprocesses, basic functions)
  • only by events are released
  • result in events
  • Example: "“Order accept"”
  • only functions can be assigned times or costs
  • diagram by rectangles with rounded off hitting a corner (see diagram)
• Linkage operators/connectors
  • Antivalence (XOR) (either, or = only accurately a case may arise)
  • Disjunction (OR) (or = one or more cases are conceivable)
  • Conjunction (AND) (all cases must arise)
  • Side connectors are geiteilt in the center and refer with a page break to the following element. The outgoing side connector gives the number of the connector the side on that the continuation follows on and down here above. The side connector of the continuation indicates above the side of the predecessor and down the number of the predecessor.
• Rules for connectors
  • If a function or an event by a connector so may the unification was divided only via the same connector take place.
  • After an event only one conjunction (AND) may not be able to meet to follow events a decision there. A decision can be made only by functions. Antivalence (XOR) and disjunction (OR) may follow thus only according to functions.
  • If two connectors one on the other meetings can one these also into one combine. For this one partitions the connector by a horizontal line. The upper connector comes into the upper and the lower connector into the lower half.
• Process signpost/guide/under processes

Process signpost/guide (subprocesses) and Unterprozesse serve for it a EPK to arrange. Around the clarity to guarantee one should form and this accordingly by process signposts/guides or Unterprozesse mark therefore subprocesses.

• A process signpost/guide/under process can follow only after an event.
• A subprocess/a Unterprozess starts always with a process signpost/guide or a Unterprozesszeichen in that the name of the superordinate process stands.
• In the subprocess/Unterprozess the last event before the process signpost/guide/under process is always indicated.
• The subprocess/Unterprozess always ends with a process signpost/guide/under process.
• The last event of the subprocess/Unterprozesses is repeated during the superordinate process.
• Before and after a process signpost/guide/under process an event must always stand.

Each EPK begins with at least one event (starting event) and with at least one event (final event) is locked.

extended event-controlled process chain (eEPK)

An extended form of the modelling method EPK represents the extended event-controlled process chain (eEPK). Into the EPK represented logical operational sequence of a business process on the basis eEPK by the elements of the organization, data and achievement modelling are extended.

For example can be supplemented here additional information about implementing, supporting systems, used data, produced files etc., which make the connection to other model sighting of the ARIS house.

The moreover information objects (e.g. data bases, customer data) are used, which influence on functions (to change) or information from them could get.

Operational areas

EPKs can be used for different tasks:

• Evaluation and implementation of standard software
• Representation of expirations with self-developments
• Process optimization with the Business Process Reengineering
• Analysis and optimization of business processes in the context of the Process performance management
• Illustration of expirations with user trainings
• Business process modelling (standard in small and middle enterprises)
• Process cost calculation
• Modelling of BPEL processes (see)

Literature

• Staud, Josef L.: Business process analysis: Event-controlled process chains and object-oriented business process modelling for economical standard software. Berlin and others: Springer, 2001. ISBN 3-540-41461-4

• Becker, J.; Kugeler, M.; Rose man, M.: Process management - a manual for process orientated organization organization. 5. over work. Edition, Springer, Berlin 2005.

• Cellar, G.; M.; Scheer, A. - W.: Semantic process modelling on the basis of event-controlled process chains (EPK). In: Scheer, A. - W. (Hrsg.): Publications of the institute for economical informatics. Number 89, Saarbruecken 1992.

• Scheer, A. - W.: ARIS - Modelling methods, Metamodelle, applications. 4. Edition, Springer, Berlin 2001.

• Scheer, A. - W.: ARIS - From the business process to the application system. 4. Edition, Springer, Berlin 2002.

• Scheer, A. - W.: ARIS House OF Business engineering: Of the for Workflow steered application: of the Business Process Reengineering to the Continuous Process Improvement. In: Scheer, A. - W. (Hrsg.): Publications of the institute for economical informatics. Number 133, Saarbruecken 1996.

See also

• Entity Relationship model
• Family tree
• Function tree
• Activity diagram

Related links

• Tool for EPKs for Eclipse - with literature references
• GI-working group "“business process management with event-controlled process chains"” - with literature references
• of for the concept of the event-controlled process chain (EPK)
• Tool-independent format for event-controlled process chains of models/EPC Markup LANGUAGE (EPML)

Articles in category "Event-controlled process chain"

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Related Websites

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