13. A method, comprising: in response to reading requirement specifications represented by requirement specification data objects from first cells of first documents, and in response to reading test functions represented by test function data objects from second cells of second documents, creating, by a system comprising a processor, a trace matrix representing a relationship between a requirement specification of the requirement specifications corresponding to a first cell of the first cells of the first documents and a test function of the test functions corresponding to a second cell of the second cells of the second documents, wherein a test function identification (ID) representing the test function comprises a requirement specification ID representing the requirement specification; and in response to receiving a request to change the requirement specification corresponding to the first cell of the first cells of the first documents, determining, based on the trace matrix using the requirement specification ID, affected requirement specifications of the requirement specifications that have been affected by the request.
13. A method, comprising: in response to reading requirement specifications represented by requirement specification data objects from first cells of first documents, and in response to reading test functions represented by test function data objects from second cells of second documents, creating, by a system comprising a processor, a trace matrix representing a relationship between a requirement specification of the requirement specifications corresponding to a first cell of the first cells of the first documents and a test function of the test functions corresponding to a second cell of the second cells of the second documents, wherein a test function identification (ID) representing the test function comprises a requirement specification ID representing the requirement specification; and in response to receiving a request to change the requirement specification corresponding to the first cell of the first cells of the first documents, determining, based on the trace matrix using the requirement specification ID, affected requirement specifications of the requirement specifications that have been affected by the request. 15. The method of claim 13 , wherein the second cells comprise a row of a data table of a Microsoft® Word file or a cell of a Microsoft® Excel file.