Consider mistakes that are commonly made during some task you do (or supervise) either at home, school, or work. Examples of common mistakes include putting a postage stamp in the wrong corner of an envelope or putting NiMH batteries in a NiCd battery charger.

Select a common mistake and devise a poka-yoke to prevent the mistake. Remember, poka-yokes should be simple, low cost, and used 100% of the time. If possible, implement the poka-yoke.

Prepare a problem-solving A3 report that explains the mistake and the proposed poka-yoke. Follow the conventional format for A3 reports, including background information, goal, and proposed solution. A3 reports can be handwritten if neatly done. Sketches or pictures may be included if clearly labeled. A template is available in this unit.