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Maintenance
- Happens when system is implemented and evaluated
- Purpose and need
- A system may not do what its purpose is
- A system may not do what its purpose is
- Three types of maintenance
- Corrective
- Fixes anything that isn't operating well
- Errors found in the system
- Errors found in the system
- May only come to light by using the system
- Missed by testing
- Fixes anything that isn't operating well
- Perfective
- System running ok
- However there is room for improvement
- However there is room for improvement
- A part might not work properly
- Software is altered to improve system
- Software is altered to improve system
- System running ok
- Adaptive
- Adapt to changing needs
- Parameters change
- Software then altered
- Software then altered
- Parameters change
- E.g. New hardware becomes available
- Adapt to changing needs
- Corrective
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