PDA handheld device mainly includes three parts: basic data management, error prevention management and traceability management. The overall goal is to establish a comprehensive, integrated, advanced, and stable quality error prevention system, monitor the assembly of key parts, and prevent process leakage caused by human factors. It can standardize the product operation process and strictly require the operation according to the product process. It solves the problems of lack of assembly operation guidance, timely correction of errors, and timely termination of serious errors in the production and assembly process, so as to achieve real-time monitoring, timely response, and immediate solution.

The error-proof traceability system needs to adopt a unified information method. By installing information records such as 1D/2D barcodes and RFID on the assembly line, through real-time scanning and comparison of the pda handheld terminal, it can identify whether the assembly meets the requirements through the all-in-one machine or touch screen. , as well as sending real-time data during the assembly process to the system log server.

The key information is collected and associated with the door panel information, and a unified key condition bar code rule is established. The key condition barcode can be traced through the pda handheld terminal to know which supplier, production date, production batch and other information of the key element. This facilitates batch management and later quality traceability. All relevant key information can be traced through any barcode information in the key.