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Concept
Return on investment
Summary
Return on investment (ROI) or return on costs (ROC) is a ratio between net income (over a period) and investment (costs resulting from an investment of some resources at a point in time). A high ROI means the investment's gains compare favourably to its cost. As a performance measure, ROI is used to evaluate the efficiency of an investment or to compare the efficiencies of several different investments. In economic terms, it is one way of relating profits to capital invested.
In business, the purpose of the return on investment (ROI) metric is to measure, per period, rates of return on money invested in an economic entity in order to decide whether or not to undertake an investment. It is also used as an indicator to compare different investments within a portfolio. The investment with the largest ROI is usually prioritized, even though the spread of ROI over the time period of an investment should also be taken into account. Recently, the concept has also been applied to scientific funding agencies’ (e.g., National Science Foundation) investments in research of open source hardware and subsequent returns for direct digital replication.
ROI and related metrics provide a snapshot of profitability, adjusted for the size of the investment assets tied up in the enterprise. ROI is often compared to expected (or required) rates of return on money invested. ROI is not time-adjusted (unlike e.g. net present value): most textbooks describe it with a "Year 0" investment and two to three years' income.
Marketing decisions have an obvious potential connection to the numerator of ROI (profits), but these same decisions often influence assets’ usage and capital requirements (for example, receivables and inventories). Marketers should understand the position of their company and the returns expected. For a marketing ROI percentage to be credible, the effects of the marketing program must be isolated from other influences when reported to executives. In a survey of nearly 200 senior marketing managers, 77 percent responded that they found the "return on investment" metric very useful.
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