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六式碼(粵拼:luk6 sik1 maa5,英文:Six sigma)係一套商業流程管理標準,1986年由摩托羅拉發明,最初目的係工業生產上面,將出現次貨嘅機會限制喺六個標準差(約莫0.00034%)下面。
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