Aim for average and you’ll serve no one well
“They recruited 4,063 pilots from Wright Air Force Base, Ohio and measured them on 140 different metrics in order to estimate the size of the average pilot in 1950.
Daniels isolated the 10 most important variables – things like shoe size and leg length – and looked at how many pilots were average on all counts. He generously defined average as the 30% of people nearest to the mean.
The answer? Zero. There wasn’t a single pilot average on all metrics. Even when Daniels analysed just three metrics, only 3.5% of pilots were average on all counts.
Daniels concluded that the search for an average pilot was pointless. There was no such person. If you designed for the average user, then the result was perfectly suited to no-one.“