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| = R3OI =
| | #REDIRECT [[Target_Reliability_Tool]] |
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| ReliaSoft's Reliability Return on Investment(RRROI or R3OI)metric was
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| First, traditinal Return On Investment (ROI) is a performance measure used to evaluate the efficiency of an investment or to compare the efficiency of a number of different investments. In general to calculate ROI, the benefit (return) of an investment is divided by the cost of the investment; and the result is expressed as a percentage or a ratio.
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| <math>ROI=\frac{Gain\,from\,Investment\,-\,Cost\,of\,Investment}{Cost\,of\,Investment}</math>
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| In this formula "gains from investment", refers to the revenue or proceeds obtained the investment of interest. Return on investment is a very popular metric because of its versatility and simplicity. That is, if an investment does not have a positive ROI, or if there are other opportunities with a higher ROI, then the investment should be not be undertaken.
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