After a new computer system has been designed, a check has to be made to ensure the new design is compatible with the original specifications of the system.

A review of the design is undertaken to make sure that...

• the design corresponds with the specifications, and that the objectives of the new system are satisfied.
• the most appropriate techniques have been used,
• the user interface is appropriate.

Errors made in the design stage will carry through to all further development of the new system.

If there were mistakes made at the design stage, a lot of work would be done in implementing a system which, at worst, did not work, or at best, did not do the job well.