The testing team follows Software Testing Life Cycle (STLC) which is similar to the development cycle followed by the development team. There are following six phases in every Software development life cycle model: Requirement gathering and analysis. Design.
If you simply deleted an XLS file, DiskInternals Excel Recovery will look up the file system to find all XLS files that were deleted recently, and test each file for the possibility of successful recovery.
Now when Excel is configured to auto save and auto recover your documents, you will easily restore a file when something goes wrong. Further in this article you'll find out how to recover new files that you've just created and the ones that you've already saved.