QFD與DOE在六標準差DMAIC流程改善中的集成應用

INTEGRATED APPLICATION OF QFD AND DOE IN SIX SIGMA DMAIC PROCESS IMPROVEMENT

10.6220/joq.202006_27(3).0002

曹岸生(An-sheng Cao)；荊寧寧(Ning-ning Jing)；張德華(De-hua Zhang)

QFD ； DOE ； DAMIC ； 集成應用 ； 鉛酸蓄電池 ； QFD ； DOE ； DAMIC ； integrated application ； lead-acid battery

品質學報

27卷3期（2020 / 06 / 30）

156 - 170

繁體中文

DMAIC（define, measure, analyze, improve, control）是六標準差管理中流程改善的重要方法，品質功能展開（quality function deployment, QFD）是一種用戶驅動式的品質保證與改進方法，試驗設計（design of experimental, DOE）是一種有效處理多因數與響應變量關係的方法，綜合利用這些方法的功能，對提高品質改進績效至關重要。本文探索了將QFD和DOE集成應用到DMAIC流程改善中的模型和步驟，形成了一種系統的品質改進方法。在集成應用模型中，品質改進按照DMAIC流程實施，將QFD的品質屋工具應用於DMAIC的不同階段，用DOE得出的因數效應值替代QFD常用的專家打分值，從而使改善項目各關鍵環節的進行更加精準有效。將集成應用模型應用於超威集團的鉛酸蓄電池板珊一致性提升六標準差改進項目中，獲得了板珊生產的最佳工藝參數組合，將板珊的製程績效指標（preliminary process capability, PPK）由0.35提高至1.18，並提高了產品品質，降低了退貨率。

DMAIC (define, measure, analyze, improve, control) is an important process improvement method in Six Sigma management, quality function deployment (QFD) is a user-driven quality assurance and improvement method, and design of experimental (DOE) is an effective method to deal with the relationship between multi-factors and their response variables. Comprehensively utilizing the functions of these methods is essential to the improve quality performance. This paper explores a model of integrating QFD and DOE into six sigma DMAIC process improvement and its implementing steps, forming a systematic quality improvement method. In the model, quality improvement is implemented in accordance with DMAIC process in which the quality house tool of QFD is applied, and the factor effect value obtained by DOE is used to replace the expert scores commonly used in QFD so that the key links are more accurate and effective. The integrated application model was applied to the six sigma improvement project of improving the consistency of Battery boards of lead-acid battery in Chilwee Group, and the optimal combination of process parameters for battery boards' production was obtained. The preliminary process capability (PPK) level of Battery boards is increased from 0.35 to 1.18, the product quality is improved and the product return rate is reduced.

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