Observe data collection at the moment of measurement See, observe, learn how data are collected at moment and place of measurement. "You never learn more about a process than when you directly observe how data are actually measured," said Cuthbert Daniel, a superb applied statistician. See with fresh eyes. Walk around what you want to learn about. Talk to those who do measurements. See how numbers came to be. Do those measuring know the desired answer? Are those measuring skilled, alert, honest, biased, incompetent, sloppy, tired and emotional?...Artifacts and errors in measurements measured? How are outliers adjudicated? Edward Tufte, Seeing With Fresh Eyes uxmeasurement
Walt Grace's Submarine Test, January 1967 A Song by John Mayer www.youtube.com And his wife told his kids he was crazy, And his friends said he'd fail if he tried, But with a will to work hard, And a library card, He took a homemade, fan-blade, one-man submarine ride. The Astronaut Farmer