Calling an Organizational Process in an Operation
You can create an operation that calls an organizational process. This functionality enables, for example, replacement of the process called by another process without disturbing description of the main process.
To create an operation that calls an organizational process:
1. Click the arrow at the right of the Operation 
button and select Called Organizational Process.
button and select Called Organizational Process.
2. Click in the diagram within the shape of the participant responsible for its execution.
A creation dialog box opens.
3. In the Organizational Process field, select the name of the called process.
In our example, "Process Purchase Request" could be replaced by "Process Urgent Purchase Request".
By default, the operation carries the same name as the organization process called.4. Click OK.
The operation appears in the diagram with the name of the organizational process.