6GK7 243-1GX00-0XE0
6GK7 243-1GX00-0XE0
6GK7 243-1GX00-0XE0
6GK7 243-1GX00-0XE0
SPC是Statistical Process Control的縮寫, 即統(tǒng)計(jì)過程控制, 主要是利用數(shù)理統(tǒng)計(jì)的方法去識別生產(chǎn)過程中潛在的問題, 采取措施控制產(chǎn)品質(zhì)量在允許的公差或者限制范圍之內(nèi), 避免產(chǎn)品質(zhì)量的波動.另外, 同樣可以利用SPC來預(yù)測生產(chǎn)過程是否能夠滿足預(yù)先設(shè)定的要求.
SPC原理
之所以采用SPC功能,因?yàn)檫@是現(xiàn)代質(zhì)量管理的基本觀點(diǎn)決定的,即產(chǎn)品質(zhì)量由于受人員,機(jī)器,物料,制度,環(huán)鏡,軟件,輔助材料,共用設(shè)備的影響,具有變異性, 而這種變異性隨機(jī)現(xiàn)象服從統(tǒng)計(jì)規(guī)律,所以我們可以使用統(tǒng)計(jì)學(xué)的原理來分析研究.
SPC的核心工具就是一系列的控制圖, 通過對控制圖的分析, 來判斷生產(chǎn)過程的異常.SPC控制圖主要包括變量 (Variable chart) 圖和屬性 (Attribute chart) 圖和預(yù)測圖(Capability chart).控制圖中都有三條控制線, 即控制上限UCL, 控制中心線CL和控制下限LCL,
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