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| n | Maintainability. How easily can the system be |
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| modified? |
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| n | Maintenance
activities: |
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| u | Corrective:
taken to correct errors in the |
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| system. |
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| u | Adaptive:
taken to adapt the system to |
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| changes in the
environment or in the user’s |
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| requirements. Software that is adapted easily |
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| sometimes is
called extendible. |
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| u | Perfective:
taken to improve the quality of the |
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| system. |
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| n | Portability. Can the system run on different |
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| “platforms”? |
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