Kaizen Teian 1 Book

Most business books, except maybe a handful, can be summarised in a page or two. The exceptions are the classics, and they are indeed a handful. This book cashes in on the success of its predecessor, "The Loyalty Effect". Now while that book could have summarised in a couple of pages, I would rate it four stars, as it is full of anecdotes and examples that have entered the business canon on loyalty.

This book basically pushes a formula for "net promoter score", or NPS. It is intuitive, and has some correlation with the claimed variables of customer retention and financial success. However, research into the NPS shows up various flaws. (If you are interested, start here - )

Basically, the authors should have candidly proclaimed that the formula is a shortcut, and indeed not a scientific metric. Other warnings around the possibility of better metrics, and how different environmental factors would affect the efficacy of NPS, would have made this, IMO, a much more honest book.