The perception that good management is closely linked to good measurement runs deep. How often do you hear these old saws repeated: “If you can’t measure it, it doesn’t count”; “If you can’t measure it, you can’t manage it”; “If you can’t measure it, it won’t happen”? We like these sayings because they’re comforting. The act of measurement provides security; if we know enough about something to measure it we almost certainly have some control over it.