Types of maintenance

Types of maintenance

* Corrective Maintenance
   -to repair software faults(fixing bugs in the code) 
* Adaptive Maintenance (adapting the software to new environments)
   -Maintenance to add to or modify the system’s functionality
   -Modifying the system to satisfy new requirements
   -Modifying the system to suit new operation environment
* Perfective Maintenance
   -Improving programs performance, structure, reliability etc. Making changes to avoid future problems or prepare for future changes