BPMN 2.0
Business Process Model and Notation 2.0
Business Process Model & Notation 2.0
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Standard defined by Object Management Group (2011)
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Covers:
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Notation
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Semantics
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Executable model
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Talking About Processes
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Designing a process takes time and discussion (the "hard" part)
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Visualising is a great help
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Semantics is equally important after initial exploration: reduce ambiguity
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Drawing the diagram an configuring execution details
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Easy if familiarised with notation
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Not that time consuming at all
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Hidden Assumptions
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Describe the process vs. Control the process:
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There is a process engine acting as the single conductor of the process
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Process = orchestration: sequence of activities controlled by engine
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Effective Process may be a choreography (e.g. microservices)
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For BPMN, still an orchestration of the process 😜
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Process Engine
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A specialised software that understands process models
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Executes processes that have been enriched with execution configuration in an automated fashion
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Manages the process’ progression
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Control - Informs people and systems when work needs to happen
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Decide - Reacts to events, making decisions based on input
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Track - Handles state management natively
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Hidden Assumptions
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All processes adhere to the model: automated control flow prescribes and executes process according to model
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There is no state you didn’t model: transitions are instant
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Data and human tasks are not part of the process execution
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Triggering the start of the process instance is external to the model
Answers by BPMN Models
Answers provided:
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When things happen
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What order things happen in
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Under what conditions things can happen
Answers not provided:
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How, where or why things happen: intent is left to the reader
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What exactly happens or who performs something (barely)
BPMN: Advantages
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Standard - vendor and tool independent
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Common and visual language with rich expressiveness
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Executable models (optional)
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Interchangeable, even graphically
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End to End models capable of complex process patterns
BPMN: Disadvantages
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The hodgepodge: extensive palette of constructs leads to confusion
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Some configuration is invisible
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The spec has no methodology: method and style needed
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"There’s so much missing to model the business!"
Levelling Up
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BPMN Method & Style
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Bruce Silver
1st Edition
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Cody-Cassidy Press, 2009
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ISBN: 978-0982368107
2nd Edition
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Cody-Cassidy Press, 2011
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ISBN: 978-0982368114
Level 1: Descriptive BPMN
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Basic set of constructs
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Provides structure to the process
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Start(s) and End(s)
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Happy path steps
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Alternative flows
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Concurrent and conditional activities
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Describes the intent of the process
