Editing OMG OCEB BPM Technical Intermediate (section)

====Orchestration or Choreography?====
* Mike Rosen, BPTrends; 04-08-COL-BPMandSOA-OrchestrationorChoreography- 0804-Rosen v01 _MR_final.doc
* difference between Orchestration and Choreography. First:
**Defines a single master controls of all aspects of a process (top-down approach)
**Supports a graphical view of the sequence
**Easily maps to SOA
**Is usually simpler to start with; but often harder to scale to more complex processes
**Is driven by the graphical sequence model, i.e. function follows form
**Represents the state-of-the-practice, and is supported by the majority of tools
*There are currently two principle approaches to choreography,and workcomponent-based:
** message-based, define behaviors by exhaustively capturing the message contracts between collaborating parties, supported by the WS-CDL standard (Web Service Choreography Definition Language) and is often used for B2B applications
** The overall process behavior “emerges” from the working of its parts (bottom up). No global perspective is required
** Complex work processes are decomposed into work agendas where each autonomous element controls its own agenda
** Easily maps to event and agent based systems
** Is usually more difficult to start, but often easier to scale to complex processes
** Graphical representations can be derived from the process, i.e. form follows function
** Represents the state-of-the-art, and is gaining support with emerging tools