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From the customer assessment, the most prioritize criteria for this product will be the cost
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The efficiency of the process, can be evaluated by measuring the amount of water trapped and how long it can supply water to the building
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The cost can be evaluated by calculating the return of investment as well as regular maintenance cost
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The score for other criteria seems to be approximately similar
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The second priority will be the efficiency
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In conclusion, all the criteria need to be taken into consideration to make the customer satisfy
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