Adaptive maintenance -Definition - Maintaining the System

Discussion

• mr.shivam   -Posted on 19 Dec 18
  corrective maintenance:
  - This type of maintenance is to rectify design,coding and implementation problem detected after implementation of the system.this kind of problem generally surfaces immediately after the system is implemented.Corrective maintenance is a maintenance task or operation done in order to identify, isolate or separate and rectify a particular fault
  
  Adaptive
  -changes are needed as a consequence of upgraded versions or changes in operation system,hardware,or DBMS. maintenance of software to adapt to this kind of changes is called adaptive maintenance
• zacharia chege   -Posted on 03 Nov 18
  Corrective maintenance can be subdivided into;
  Immediate corrective maintenance- work starts immediately after a failure.
  Deferred corrective maintenance- work is delayed in conformance to a given set of maintenance rules.
  
• Nirja Shah   -Posted on 21 Oct 15
  - Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes.
  
  - In the late 1970s, a famous and widely cited survey study by Lientz and Swanson, exposed the very high fraction of life-cycle costs that were being expended on maintenance.
  
  - They categorized maintenance activities into four classes:
  
  Adaptive
  – It modifies the system to cope with changes in the software environment (DBMS, OS)
  
  Perfective
  – It helps in implementing new or changed user requirements which concern functional enhancements to the software
  
  Corrective
  – It helps in diagnosing and fixing errors, possibly ones found by users
  
  Preventive
  – It helps in increasing software maintainability or reliability to prevent problems in the future

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