Who invented A3 reports?
There is really no single inventor of A3 reports. Former manager of training at Toyota Isao Kato describes it more as a combination of forces including the PDCA cycle, the basic steps for a QC circle, the Toyota concept of making things visible at a single glance, and the humorous anecdotes of Taiichi Ohno refusing to read more than the first page of written reports. Instead he’d say “let’s go and see” and make people “get the facts” while he tested their thinking.
