Poka-Yoke Dissertation

POKA-YOKE

One of the common top quality concepts in statistics which you can use in continuous improvement is Poka- Yoke, which means " mistake proofing. ” Poka-Yoke, pronounced (POH-kah YOH-kay) and developed by Western industrial professional Shigeo Shingo in the early on 1960s, uses devices, methods, or examinations in order to avoid machine error or perhaps simple human error. You will discover two key types of poka-yokes:

•prevention-based poka-yokes and

•Detection-based poka-yokes.

Prevention-based poka-yokes will be mechanisms that sense that the error is about to occur and send some type of transmission of the incident or halt the process. Detection poka-yokes discover when a defect has occurred and stop the process so that the defect is not " built-in” to the product or service and dispatched downstream. Shingo believed that " The causes of defects rest in employee errors, and defects will be the results of neglecting all those errors. This follows that mistakes will never turn into defects if worker errors are discovered and eliminated in advance. ” For instance, suppose a worker is usually assembling a tool that contains two push-buttons. A spring has to be placed under every single push-button so that it can be able to operate. If possibly spring can be not put in place, the associated push-button will never work, and an error has been committed. In case the worker truly does an on-the-spot inspection by looking at the unit or simply by testing that, then the expense of fixing the device (rework) is definitely minimal, in terms of the time for you to fix it and the time lost due to inspection. If, however, the error is certainly not identified and the device moves on down the flow line and is incorporated as a portion into a product, the cost of rework, scrap, repair, or guarantee claim can become quite high.

A simple poka-yoke solution might be that the staff member first matters two suspension systems out of the supply bin and places them both in a small dish before every single assembly. If the worker can be not focusing, is daydreaming, or can be forgetful, they merely should...



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