Maintenance

Maintenance

1. Corrective

   • Previously undetected bugs revealed during the use of the system
     • These bugs may have not revealed during testing
     • Must be corrected for the software to work correctly
   • fixes anything that is not functioning as it should be

2. Perfective

   • System runs to a decent degree, however could be improved
     • Allows for you to improve performance
     • Example
       • Extra reports
       • Faster queries
     • These changes do not affect the systems functionality

3. Adaptive

   • Systems will need to adapt to changing needs within an organisation
     • Particular parts of the system could outdated and need to be updated
       • Better hardware could be available
       • government legislation requires changes
     • Example
       • Company begins expanding
         • Needs to update a standalone system to a multi-user system