For factories with low manufacturing capacity, when the first product inspection can pass, the quality inspector will control the second inspection of kanban materials. This error-proofing method cannot completely eliminate the occurrence of errors. The phenomenon of wrong use of wires mainly occurs when employees are fatigued or the work rhythm is fast. Therefore, when arranging the wire cache storage racks, the wires with similar wire colors, wire diameters, and wire types must be staggered. The operator takes the wrong wire, for example: store the 0.35FLRY-B red/blue wire and the 0.35FLRY-B red/purple wire; the 0.5AVSS yellow wire and the 0.5AVSS yellow/white wire on different cache racks, The material label on it is eye-catching and can be effectively identified.