A pool in a BPMN collaboration model represents a participant
such as a business entity or a role. A pool can have a process or
lanes associated with it.
Procedure
- In the Palette, click Pool.
- In the diagram editor, click to insert the pool.
- In the dialog box, complete one of the following steps:
- To create a new process, click Create Process, and type a name for the new process.
- To select an existing process, click Select Existing
Element, browse to an element, and click OK.
- To create a black box pool, click Unspecified A black box pool is a pool that does not have a process associated
with it or the process is unknown. A black box pool can not have tasks
or lanes added to it.
Results
A pool is created in the diagram editor with the name of the
process. In the diagram, you can add lanes and tasks to the pool,
or you can add messages to other pools. The following diagram is a
pool that is associated with a process named
Doctor.

What to do next
You can use the connectors to connect pools to elements in
different pools, or to connect pools with other pools.