One of the reasons measuring “true progress” in a product is hard is because we prefer reporting good news over bad. We like charts that trend up and to the right, which isn’t all that bad by itself, until we start devising charts that can go nowhere but up and to the right.
In the Lean Startup world, we label those charts as vanity metrics.
But not all charts devised to go up and to the right are bad. Read on to learn why…








Founder of 
