In the world of business, and more specifically customer experience, the focus on single number metrics, whether that be NPS, CES or CSAT, has for many reached mythical proportions. But very much like baseball, they rarely tell the whole story, or even the right story, when it comes to measuring true business success through a customer’s eyes, and their resulting emotions.
http://customerthink.com/measuring-what-matters-for-positive-customer-outcomes-the-end-is-insight/