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Virtual input(output)

Virtual input is obtained for each input by taking the product of the input’s value and its corresponding optimal weight as given by the solution to the primal model. Virtual outputs are obtained analogously. A virtual input or output describes the importance attached to the given factor. The virtual inputs always add up to the maximum efficiency score (ie 1) for the unit being analysed, while the sum of the virtual outputs will equal that unit’s efficiency.

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