This videotape shows application of many different mistake proofing devices in operation at Ford Motor Company, United Electric, and TRW. Mistake proofing or poka-yoke, is implemented as an important part of these companies quality process. Some of the devices in this video are quite complex, like the one used by TRW to make sure the air bag is packed right, and others are very simple and can be made for very low cost. This video explains how you can design mistake proofing devices and put them to work in your operation today. Mistake proofing is a system that eliminates defects without the use of statistical process control (SPC), or complex solutions. By its nature, this zero defect tool will also aid in the process of continuous improvement and worker involvement.