User interface elements are identified and cataloged into a user interface inventory database keyed on a global user interface element identifier. Information is collected for user interface elements activated in an executing application or applications. Scenario information is collected and is used to update the user interface inventory database. Scenario information includes information concerning user interface element usage, state changes, etc. in time. The described information can be collected over a period of time and from a number of different computer systems. The information can be analyzed to determine and quantify usage and testing of user interface elements. The analyzed information can be used to determine how thoroughly a user interface element has been tested, how often the user interface element works as expected, most commonly used user interface elements and other information. The collected information can be used to track, quantify and identify ownership of user interface elements.