Error-proof technology refers to any device or facility that can prevent human errors from happening, or allow people to find errors at a glance. According to the effect of error proofing, error proofing technology can be divided into the following three levels: ● Error proofing without manufacturing defects, that is, it is impossible to manufacture bad parts, and the number of parts that may be damaged is zero; ● Error proofing without transmitting defects, that is It is impossible to transfer bad parts to the next station; ● Error proofing that does not accept defects, that is, subsequent stations do not accept bad parts. The characteristics of error-proofing technology: First, it can discover potential problems. The error-proofing technology itself has a strong preventive nature. One of the meanings of its existence is to be able to detect potential problems in time, so that producers can have enough time to deal with errors and prevent economic losses caused by erroneous production. It can be said that One of the main logics of the establishment of error-proofing technology is to discover problems, analyze problems, solve problems, and summarize and analyze. Second, eliminate the influencing factors of product defects. Error proofing technology prevents wrong production of products and can reduce corresponding economic losses. But if you want to fundamentally avoid errors, you should fundamentally eliminate the causes of errors. The application of error-proofing technology is just able to find the cause of errors from the source, deal with these unfavorable factors in the most reasonable and appropriate way, and eliminate the influencing factors of product defects.