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.
Select  Document  and click . Next  button to start your Excel file recovery job. Step 2. Select the disk where you lost your data and click  Scan  button, the software will quickly scan the selected disk to find all your lost Excel files. If you lost your partition, select  Lost Disk Drives  and  Scan  to continue the recovery process. Step 3.