A Rigorous Semantics for BPMN 2.0 Process Diagrams by Felix Kossak, Christa Illibauer, Verena Geist, Jan Kubovy,

By Felix Kossak, Christa Illibauer, Verena Geist, Jan Kubovy, Christine Natschläger, Thomas Ziebermayr, Theodorich Kopetzky, Bernhard Freudenthaler, Klaus-Dieter Schewe

This booklet presents the main entire formal specification of the semantics of the enterprise approach version and Notation 2.0 general (BPMN) to be had to this point, in a mode that's simply comprehensible for quite a lot of readers – not just for specialists in formal tools, yet e.g. additionally for builders of modeling instruments, software program architects, or graduate scholars focusing on enterprise strategy management.

BPMN – issued via the thing administration staff – is a conventional average for enterprise strategy modeling. although, significant drawbacks of BPMN contain its restricted help for organizational modeling, its in simple terms implicit expression of modalities, and its loss of built-in consumer interplay and information modeling. extra, in lots of circumstances the syntactical and, specifically, semantic definitions of BPMN are erroneous, incomplete or inconsistent. The booklet addresses concrete matters about the execution semantics of industrial tactics and offers a proper definition of BPMN procedure diagrams, that can function a valid foundation for extra extensions, i.e., within the type of horizontal refinements of the middle language.

To this finish, the summary kingdom laptop (ASMs) process is used to formalize the semantics of BPMN. ASMs have validated their price in a number of domain names, e.g. specifying the semantics of programming or modeling languages, verifying the specification of the Java digital laptop, or formalizing the ITIL swap administration process.

This type of development promotes extra consistency within the interpretation of accomplished types, in addition to actual exchangeability of types among varied instruments. within the outlook on the finish of the booklet, the authors finish with featuring extensions that handle actor modeling (including an intuitive strategy to denote permissions and obligations), integration of user-centric perspectives, a polished communique idea, and information integration.

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An end event terminates the workflow—at least at the given location—while due to possible splitting by gateways, the same instance might still be active in other branches. A process instance as a whole can only complete when all tokens have reached end events and no activities are left working for this instance. Activities are special flow nodes in that they have an internal lifecycle. This means that every process instance passing through an activity has to go through a small, predefined internal workflow—involving such states as “Active”, “Completing” and “Completed” and states for abnormal situations like “Failing”, etc.

It ignores interrupting events if the activity is in a final lifecycle state; otherwise, all running, non-interrupting event sub-processes and all active or ready activities are interrupted. The activity’s context is stored if an interrupting event sub-process is initiated. e. to “Terminating”, “Failing”, “Terminated” or “Failed”). Setting the lifecycle state to “Withdrawn” is not necessary because we do not support receive tasks (see Sect.

The BPMN standard leaves this open and, consequently, we abstract from this by means of the abstract derived function givenTriggerOccurred (for a given trigger type). Still, we determine that new process instances are created by start events (and not from outside; cf. [95, p. 439], “handling consists of starting a new Process instance each time the Event occurs”). It should be noted, though, that interoperability of different tools will most probably require a more detailed specification, as will enhanced user/environment interaction models (both of which are subject to ongoing research by our team).

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