Jidoka means building the detection of abnormality into the process, so it stops itself instead of producing defects until someone notices. The usual translation, “automation with a human touch”, obscures the idea more than it conveys it.
It comes from Toyoda’s automatic loom, which halted when a thread broke. Before that a loom with a broken thread carried on weaving flawed cloth, so one person watched one loom. Afterwards one person could watch many. That economic argument is still the whole case: separating human work from machine work only becomes possible once the machine can be trusted to stop.
Fica ao lado do Poka-Yoke e confunde-se com ele. O Poka-Yoke impede totalmente que o erro seja cometido; o Jidoka deteta a anormalidade assim que ela ocorre e para. Prevenção na etapa versus deteção no sistema.
Both depend on stopping being genuinely permitted. In an organisation measured only on output, the stop gets overridden, and the mechanism is dead in practice long before anyone acknowledges it. Detection thresholds fail the same way from either direction — too loose and nothing ever triggers, too tight and the alarm becomes background noise.
