Taiichi Ohno, creator of the Toyota Production System is credited, perhaps apocryphally, with taking new graduates to the shop floor and drawing a chalk circle on the floor. The graduate would be told to stand in the circle, observe and note what he saw. When Ohno returned he would check; if the graduate had not seen enough he would be asked to keep observing. Ohno was trying to imprint upon his future engineers that the only way to truly understand what happens on the shop floor was to go there. It was where the value was added and waste could be observed.