本文叙述了以应用数学为基础,用正交试验设计、方差分析、X-R控制图、因果图、主次因素排列图等手法,来巩固和提高镀锌管银牌质量的方法。以全面质量管理PDCA循环的四个过程、八个步骤和七种工具的应用,来实现现代化管理。 This paper describes a method to consolidate and improve the silver medal quality of galvanized pipe based on the application of mathematics, using orthogonal experimental design, analysis of variance, X-R control chart, causal chart and arrangement of primary and secondary factors. To achieve the modern management by using four processes, eight steps and seven kinds of tools of total quality management PDCA cycle.