You can generate an Audit Trail report that lists actions recorded in the application, whether those actions were in response to work orders, or changes made to the data center model.
The Audit Trail report is available if you have IT Advisor: Change.
The Audit Trail report is available from Analytics > Reports. It can also be generated for individual components and racks in Operations > Data Center. Right-click a component or rack in the layout, and select Asset Audit.