Hey everyone, welcome to this lecture. What is Poka Yoke a polka yoky is a Japanese term for mistake proofing or error proofing. It is a method used to prevent errors. There are a number of examples in day to day life that use the mistake proofing concept such as electrical plugs and sockets that prevent plugging the wrong way. SIM cards that can be inserted in the SIM card slot in a right way. motion sensors that shuts off the lights when it does not detect any motion for more than a stipulated time.

A window envelope is also a mistake proofing method that allows users to see the letter with the right address sealed in. Similarly, there is detection type mistake proofing that alerts the user immediately after an error is made to prevent further errors of course examples car alarms when the driver forgets to wear his seatbelt, the elevator or the lift signal of being over capacity when more than the required number of people enter the concept of Poka Yoke was formalized and the term adopted by Shigeo Shingo as a part of the Toyota Production System. It was originally described as Baka Yaki. But as this means full proofing or idiot proofing, the name was changed to the milder word Poka Yoke