Assembly Efficiency, 組裝效率

Assembly Efficiency 組裝效率﹐事實上談的卻不是生產線上的組裝效率﹐這是Boothroyd Dewhurst 公司用來衡量產品設計在組裝難易度(DFA, Design For Assembly)上的指標﹐他的基本理論是﹐每個產品在刪除不必要的零件之後﹐有它最理想的零件數量(Nm)﹐而每個零件的理想組裝時間是3秒鐘﹐因此DFA的組裝效率指標就是:

 

EM = Nm X 3 / T 其中T是估計的組裝時間

 

換句話說﹐所謂組裝效率就是﹐理想組裝時間與預估組裝時間之比值﹐比值越接近一﹐這個設計在組裝性上越接近完美﹐實際的經驗是20~50%左右。

 

好的設計有較高的組裝效率﹐而其對應的組裝複雜度與不良率也會相對改善。

 

參考資料: A Global Conformance Quality Model

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