chapter 13 the business process management notation

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Chapter 13The Business Process Management Notation

Gero DeckerRemco DijkmanMarlon Dumas

Luciano Garçia-Bañuelos

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Contents• BPMN• BPMN and YAWL• Modelling aspects in BPMN:

– Control-flow– Data– Resource– Exception

• Transforming BPMN into YAWL:– Control-flow– Data– Resource– Exception

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BPMNThe Business Process Modelling Notation (BPMN)• Graphical notation for conceptual processes• Covers control, data, authorization, exception• Standardized by OMG• Current version 1.2

Issue Trackpoint

Notice

Log TrackpointOrder Entry

Freight deliveredInitiate

ShipmentStatus Inquiry

more Trackpoints

Create AcceptanceCertificate

24 hours

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BPMN and YAWL

BPMN

YAWL

moreabstract

moreconcrete

morerequirements

oriented

moreimplemnt.oriented

moreimplemnt.freedom

lessimplemnt.freedom

morebusinessoriented

moretechnology

oriented

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Modelling with BPMN – Control FlowActivities

looptask+

collapsed sub-process

~ +

ad-hoc sub-process

multi-instancetask

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Modelling with BPMN – Control FlowEvents

start event

intermediateevent

end event

decorations: message

error

time

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Modelling with BPMN – Control FlowGateways

AND

XOR

Event-based

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Modelling with BPMN – Control FlowExample

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Modelling with BPMN – DataExample

Issue Trackpoint

Notice

Log TrackpointOrder Entry

Freight deliveredInitiate

ShipmentStatus Inquiry

more Trackpoints

Create AcceptanceCertificate

24 hours

Trackpoints Trackpoint Notices Trackpoint Order Entries Log

Acceptance Certificate

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Modelling with BPMN – ResourceExample

Issue Trackpoint

Notice

Log TrackpointOrder Entry

more Trackpoints

Car

rier

Car

rier

Adm

in

Offi

cer

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Modelling with BPMN – Exception• Exception events• 'Throw' events• 'Catch' events

Catch Exception event

Throw

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Modelling with BPMN – ExceptionExample

Create Purchase

Order

Approve Purchase

Order

ConfirmPurchase

Order

Ordering

ModifyPurchase

Order

O rder not approved

Order not approved

Order approved

Order timed out

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BPMN to YAWL – Control FlowTrivial cases

Timeout /

Receive

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BPMN to YAWL – Control FlowNon-Trivial cases• Multiple subsequent gateways• Multiple start events• Multiple end events• Multi-instance tasks

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BPMN to YAWL – Data• Data is loosely defined in BPMN• Data handling is strict in YAWL• Hence, data usage must restricted in BPMN

(to be able to map to YAWL)

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BPMN to YAWL – DataRestricted usage:• Define data types in XML Schema• Define expressions in XQuery

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BPMN to YAWL – DataRestricted usage

Task

Process

has variables

has variablesassignment atstart of task

assignment atend of task

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BPMN to YAWL – DataMapping is now trivial

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BPMN to YAWL – Resource• Mapped from swimlanes• Swimlanes are loosely defined in BPMN

Issue Trackpoint

Notice

Log TrackpointOrder Entry

more Trackpoints

Car

rier

Car

rier

Adm

in

Offi

cer

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BPMN to YAWL – ExceptionThrow/catch event

+

B

Ce

B

Ce

~ee :=true

default: e := false

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BPMN to YAWL – ExceptionTimer event

A

e

B

C

A

e

B

C

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BPMN to YAWL – ExceptionRule event

+

B

C

e

B

C

A1

e

~eA1 A2A2

e:=true

default: e := false

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Conclusion

• BPMN is used more for conceptual modelling• YAWL is used for workflow modelling• In a process design project BPMN comes before YAWL• BPMN can be mapped to YAWL• This helps in a design step