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Topic Title: BPMN: Message Flows between lanes in the same pool
Topic Summary: Message Flows are not allowed between lanes in the same pool
Created On: 27-Sep-2006 15:15
Status: Read Only
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 27-Sep-2006 15:15
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Shobha Radhakrishnan

Posts: 2
Joined: 27-May-2005

After reading the following on BPMN
- BPMN OMG Final Adopted Specification of March 6 2006,
- Introduction to BPMN by Stephen A.WHite, IBM Corporation.

In the latter paper are the following statements:
"Pools are used to represent Participants in the process"
"Message flow is defined as the mechansim to show the communication between two participants"
"Lanes are often used to separate the activities associated with a company function or role"

With the above three statements, I am having difficulty understanding the rationale for the below statement about BPMN
"Sequence Flow may cross the boundaries of Lanes within a Pool, but Message Flow may not be used between FLow objects in Lanes of the same Pool".

To model the process of how a Customer project is executed by a company, I want to model Organisation Units (e.g. Sales, Development) as Pools and roles inside those Units as Lanes (e.g. Project Manager, Team Leader, Architect, Developer etc),

Message Flows can be used to represent the interactions between Sales and Development Units. But I am not allowed to use Message Flows to represent the interactions between an Architect and the Developer. WHy? Am I using the pools and lanes in a manner that is against the philosophy of BPMN?

I tried to get an answer from BPMN OMG Final Adopted Specification of March 6 2006, but the rationale was not very clear.
Please could I have a clarification for the rationale between not allowing message flows between lanes in the same pool.

 

 

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