Operating margin
In business, operating margin—also known as operating income margin, operating profit margin, EBIT margin and return on sales (ROS)—is the ratio of operating income ("operating profit" in the UK) to net sales, usually expressed in percent. Net profit measures the profitability of ventures after accounting for all costs. Return on sales (ROS) is net profit as a percentage of sales revenue. ROS is an indicator of profitability and is often used to compare the profitability of companies and industries of differing sizes. Significantly, ROS does not account for the capital (investment) used to generate the profit. In a survey of nearly 200 senior marketing managers, 69 percent responded that they found the "return on sales" metric very useful. Unlike Earnings before interest, taxes, depreciation, and amortization (EBITDA) margin, operating margin takes into account depreciation and amortization expenses. {NNP = GNP- depreciation /GNP = GDP- depreciation Purpose These financial metrics measure levels and rates of profitability. Probably the most common way to determine the successfulness of a company is to look at the net profits of the business. Companies are collections of projects and markets, individual areas can be judged on how successful they are at adding to the corporate net