(原)獨立需求與相關需求-讀書筆記

urinator發表於2008-04-26

以前對獨立需求和相關需求的理解是錯誤的,其根源是讀《製造資源計劃-MRPII原理》一書的時候沒有看透,把獨立需求和相關需求看成是物料的屬性了。認為獨立需求是MPS的物料,相關需求是MRP的物料。

在一次ITPUB的討論中,在騎牛後衛反駁後,我仔細看了APICS的詞典,裡面的原文是這樣的:

independent demand

The demand for an item that is unrelated to the demand for other items. Demand for finished goods, parts required for destructive testing, and service parts requirements are examples of independent demand.

 

dependent demand

Demand that is directly related to or derived from the bill of material structure for other items or end products. Such demands are therefore calculated and need not and should not be forecast. A given inventory item may have both dependent and independent demand at any given time. For example, a part may simultaneously be the component of an assembly and sold as a service part.

 

從APICS的解釋中可以看出:對於同一種物料,獨立需求和相關需求是有可能同時存在的。而根本的區別是:相關需求是計算出來的,而獨立需求是預測出來的。那麼從這個角度,可以說:獨立需求和相關需求是計劃屬性,而不是物料屬性。

 

世界上就怕認真二字。

 

 

 

來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/7942439/viewspace-254550/,如需轉載,請註明出處,否則將追究法律責任。

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