I don't think this is possible in Report Builder. It uses RIDW.VW_REQUEST which is a view. That view contains columns such as CREATION_DATE , CLOSED_DATE , SUBMIT_DATE , RESOLVED_DATE , ASSIGNED_DATE , DUPLICATE_DATE , and ACTIVATE_DATE . So all you know is the last date when a work item went into the corresponding state. You won't know from which state it went into that state. And if the state moves back and forth between a pair of states, you won't know the cumulative time it was in a particular state. Not all of these view columns are defined as meta properties in Report Builder, and I do not think it is possible for a customer to add them. I think the best you can do is add a custom expression using a database vendor specific date difference function, such as DATEDIFF on MS SQL server.

I found the following might be a start. For a Data Warehouse data source in Report Builder, you can select Work Item and then add a traceability link to Work Item Status History:



Then in the Format Results tab, add Status and Days in State for the Work Item Status History:

That will give you a report that looks like this: