" In our pursuit of happiness, we heed the timeless words of management guru Peter Drucker who told us “if you can’t measure it, you can’t manage it.” We define key performance indicators (KPIs) and objectives and key results (OKRs) for business. And we use wearable sensors to track steps, calories, insulin levels, and the heart rates of individuals. The numbers keep us so busy, we fail to realize Drucker would never have said those words. The quote is also attributed to W. Edwards Deming, but what he really said is “it is wrong to suppose that if you can’t measure it, you can’t manage it –a costly myth.”[ "

― Peter Morville , Planning for Everything: The Design of Paths and Goals