This document discusses key concepts in BPMN (Business Process Modeling Notation) modeling including: - Process logic describes all possible paths from start to end of a process instance. - A BPMN diagram represents both a visualization and underlying XML semantic model. The shapes do not define the model, rather they reference the underlying semantic elements. - Activities represent discrete units of work with a start and end, while a process is a sequence of activities from start to defined end states. Process modeling involves understanding how activities and processes are defined.

1. BPMN Method & Style
CHAPTER 2
How Does A Model Mean?
1

2. 2
• Process Logic
• What Is an Activity?
• What Is a Process?
• BPMN Levels
Outlines

3. Process Logic, is a description of all the paths from a single initial state of a process instance to each
of its possible end states.
3
Process Logic
Simple Process Model

4. 4
• The BPMN diagram is both a visualization and a data entry device underlying XML semantic model.
• The BPMN metamodel, element definitions, and associated rules all reference the semantic elements, not
the shapes in the diagram.
• In BPMN 2.0, you cannot have A Graphical Model without an associated Semantic Model.
BPMN 2.0 model
DS
Process Logic

5. Process
Modeler
SMEs
document
an as-is How does the process actually start?
How does the process get from X to Y?
How do you know when X is done?
Does X always end in the same way?
Process Logic Answers
with
5
Process Logic

6. Activity and Process
An activity in BPMN is an action, a unit of work that is performed
repeatedly in the course of business.
A BPMN activity is :
• a discrete action with a well-defined start and end, or functions
performed continuously
A process in BPMN is a sequence of activities leading from an initial
state of the process instance to some defined end states.
• Process is also discrete action.
6
The modeler needs to
have clarity on the
meaning of the activity
instance.
Process
Modeler

7. BPM often refers to business process frameworks, such as (ITIL, SCOR,) the most
common one is APQC (American productivity and quality center), publishes a cross-
industry Process Classification Framework (PCF)
7

8. 8
BPMN Process Modeling Levels
• The Level 1 palette called Descriptive Process Modeling
• The Level 2 palette called Analytic Process Modeling
• The Level 3 palette called the Common Executable Process Modeling

9. 9
is essentially the shapes and symbols carried over from traditional flowcharting
The Level 1 palette Descriptive Process Modeling

10. 10
refers to exception handling, with emphasis on Message, Timer, and Error events, plus some additional
branching and merging patterns
The Level 2 palette Analytic Process
Modeling

11. 11
is define executable process logic using the XML elements defined in
the BPMN standard
Level 3 palette Common Executable Process Modeling

12. 12
END.