Interwood manufactures high-quality wood furniture and distributes it to retail stores throughout Pakistan. As the business and technical changes typically occur over some period of time Interwood migrated to a different operating environment. Within the functional areas of Sales and Accounting, the process of upgrading microcomputer hardware and its associated operating system for all employees was completed. Interwood encountered the compatibility issues of existing computer-based application with newly installed hardware and operating system. These changes to be made are usually less urgent and typically occur over some period of time.

Being a member of Testing team, what activities in the software lifecycle will you use to judge whether this system is ready to be deployed to the customer?