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| • | How
much maintenance cost is “reasonable?” |
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| – | Corrective
maintenance costs are ostensibly not |
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| “reasonable” |
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| – | How
much adaptive maintenance cost is “reasonable”? |
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| – | How
much perfective maintenance cost is |
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| “reasonable”? |
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| • | Measuring
“reasonable” costs in terms of |
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| percentage
of life cycle costs doesn’t make sense |
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