System Development

11.8 Maintenance

11.8.1 Post Implementation Review

This is carried out several weeks or months after the system has been implemented.

Small changes may need to be made:

For example:

• Correct program errors
• Amend clerical procedures
• Modify screen and report formats

11.8.2 Perfective Maintenance

Here we are concerned with taking an acceptable system and making it better.

11.8.3 Adaptive Maintenance

As the system requirements change, the system needs updating.

11.8.4 Corrective Maintenance

There may still be problems with our system that need to be corrected.

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