A.品種齊全性系數(shù)B.商品品種穩(wěn)定系數(shù)C.顧客等候服務(wù)的時間系數(shù)D.附加服務(wù)項(xiàng)目系數(shù)
A.b/BB.d/DC.e/ED.(c1/C+c2/C+……+cn/C)/n
A.b/BB.d/DC.e/ED.(a1/A+a2/A+……an/A)/n