Intuitively we know that if customer satisfaction increases, revenues and profits increase. Is there actual documentation to demonstrate this? What is the correlation between a percentage increase in customer satisfaction and revenue increase? Is the

Intuitively we know that if customer satisfaction increases, revenues and profits increase. Is there actual documentation to demonstrate this? What is the correlation between a percentage increase in customer satisfaction and revenue increase? Is there a formula that companies can use to prove the true vale of increased customer satisfaction?