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.
1 You can use the Undo button to recover any deletions that you make while editing an Excel 2010 document, as long as you have not closed the document since making the deletion.