The Contact Method is a Poka Yoke technique using a part’s physical attributes such as its color, shape, size, dimensions or weight to prevent or detect errors.


  • Color-coding for cables and connectors (e.g. between your computer and monitor)
  • Dimension sensors (e.g. a mesh only letting items of a certain size through)
  • Weight sensors (e.g. used to determine whether a product is missing pieces)

Learn more about this topic in our Poka Yoke Online Course (Demo currently not available for Internet Explorer).

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