Chapter 13 The Business Process Management Notation Gero

Contents • BPMN and YAWL • Modelling aspects in BPMN: – – Control-flow Data Resource Exception • Transforming BPMN into YAWL: – – Control-flow Data Resource Exception real a university for the © 2009, www. yawlfoundation. org world R 2

BPMN The Business Process Modelling Notation (BPMN) • Graphical notation for conceptual processes • Covers control, data, authorization, exception • Standardized by OMG • Current version 1. 2 more Trackpoints Issue Trackpoint Notice Log Trackpoint Order Entry Create Acceptance Certificate Freight delivered 24 hours real a university for the © 2009, www. yawlfoundation. org world Initiate Shipment Status Inquiry R 3

BPMN and YAWL BPMN more abstract more requirements oriented more implemnt. freedom more business oriented YAWL more concrete more implemnt. oriented less implemnt. freedom more technology oriented real a university for the © 2009, www. yawlfoundation. org world R 4

Modelling with BPMN – Control Flow Activities task collapsed sub-process + loop real a

Modelling with BPMN – Control Flow Events start event decorations: message intermediate event error

Modelling with BPMN – Control Flow Gateways AND XOR Event-based real a university for

Modelling with BPMN – Control Flow Example more Trackpoints Issue Trackpoint Notice Log Trackpoint Order Entry Create Acceptance Certificate Freight delivered 24 hours real a university for the © 2009, www. yawlfoundation. org world Initiate Shipment Status Inquiry R 8

Modelling with BPMN – Data Example Trackpoints Trackpoint Notices Trackpoint Order Entries Log Acceptance Certificate more Trackpoints Issue Trackpoint Notice Log Trackpoint Order Entry Create Acceptance Certificate Freight delivered 24 hours real a university for the © 2009, www. yawlfoundation. org world Initiate Shipment Status Inquiry R 9

Modelling with BPMN – Resource Example Carrier more Trackpoints Carrier Admin Officer Issue Trackpoint Notice Log Trackpoint Order Entry real a university for the © 2009, www. yawlfoundation. org world R 10

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

Modelling with BPMN – Exception Example Ordering Create Purchase Order Approve Purchase Order not approved Order approved Confirm Purchase Order Modify Purchase Order not approved real a university for the © 2009, www. yawlfoundation. org world Order timed out R 12

BPMN to YAWL – Control Flow Trivial cases Timeout / Receive real a university

BPMN to YAWL – Control Flow Non-Trivial cases • Multiple subsequent gateways • Multiple start events • Multiple end events • Multi-instance tasks real a university for the © 2009, www. yawlfoundation. org world R 14

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) real a university for the © 2009, www. yawlfoundation. org world R 15

BPMN to YAWL – Data Restricted usage: • Define data types in XML Schema

BPMN to YAWL – Data Restricted usage Process has variables assignment at end of task Task assignment at start of task real a university for the © 2009, www. yawlfoundation. org world has variables R 17

BPMN to YAWL – Data Mapping is now trivial real a university for the

BPMN to YAWL – Resource • Mapped from swimlanes • Swimlanes are loosely defined in BPMN Carrier more Trackpoints Carrier Admin Officer Issue Trackpoint Notice Log Trackpoint Order Entry real a university for the © 2009, www. yawlfoundation. org world R 19

BPMN to YAWL – Exception Throw/catch event B e : =true ~e B +

BPMN to YAWL – Exception Timer event A B e C real a university

BPMN to YAWL – Exception Rule event A 1 B A 2 + A

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 real a university for the © 2009, www. yawlfoundation. org world R 23