Once more, the third chapter, in the preliminary design process, the use cause and effect chart analytic method, searches the preliminary design stage quality control the key point.
再次，第三章，在初步设计过程中，利用因果图分析法，查找出初步设计阶段质量控制的关键点。
Then two plans and a chart (effect-cause map, list map and check chart) were used to analyze the reasons causing defect positioning or quantitative errors.
然后利用两图一表(因果图、排列图和检查表)分析引起缺陷定量或定位错误的原因。
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