Data input doesn’t output knowledge
Uncertainty is all around us. A lean leader’s main purpose is to develop people so they can tackle uncertainty. There are two ways to tackle uncertainty: One is genchi genbutsu (go and see, or seeing for yourself), and the other is to employ the plan-do-check-act (PDCA) cycle, a method for learning and improvement developed by statistician Walter Shewhart.
from http://www.qualitydigest.com/inside/lean-column/082916-information-gemba.html
via https://raymondarsenaultblog.wordpress.com/2016/08/26/information-at-the-gemba/