usefulness 

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n. utility

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n.   inutility��unusefulness��uselessness

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1. Determines the significance, importance, usefulness or value of.
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2. Shared networks can potentially improve the usefulness and efficiency of communications systems, but they also create competition for communal resources.
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3. The company's Freedom brand "Gabriel" flat emery cloth round of series regardless of workmanship, appearance, or usefulness of speaking, have reached the most advanced production standard.
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n.
  1. the quality of being of practical use

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Usefulness
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decision usefulness
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outlive usefulness
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lost usefulness
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perceived usefulness
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