The document provides steps for creating a workflow in SAP using a business object to trigger an email notification when a purchase order is released:
1. Create a new workflow in transaction SWDD and add a "Send Mail" step.
2. Configure the basic data, selecting the BUS2012 business object and ReleaseStepCreated event to trigger the workflow.
3. This creates a linkage so that when the purchase order release event occurs for BUS2012, it will initiate the workflow.
4. Save the workflow and test it by creating a purchase order in transaction ME21N, which should then send an email notification.