I am a big fan of the Net Promoter Score. In my view it is one of the most important business metrics discoveries of the past 100 years, in the same league as Dupont Analysis, Discounted Cash Flow, and Economic Value Added, It has tremendous predictive ability as to the future growth and profit of an enterprise, and yet is relatively easy to source and analyze. NPS works because it measures the volume of delighted and angry customers, and these customers have a powerful influence on new customer acquisition and the costs of this acquisition – for many companies, the most important
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