spc基本概念介紹-資料下載頁
2025-02-19 01:21本頁面
【正文】 Sinderella LiuTest 5: Linear Trend Identification☆ Applies both for X and R controlchart ☆ Process may be OUT OF CONTROL if seven successive points show a continuing increase or decrease, a systematic trend in the process is signaled.Process MeanUpper Control LimitLower Control LimitAABBCC?? ?? ? ?? ?? ?? ??55?Sinderella LiuTest 6: Oscillatory Trend Identification☆ Applies both for X and R controlchart ☆ Process may be OUT OF CONTROL if 14 successive points oscillate up and down, a systematic trend in the process is signaled.Process MeanUpper Control LimitLower Control LimitAABBCC???? ?????? ? ???6Sinderella LiuTest 7: Avoidance of Zone C Test☆ Applies for X chart only☆ Process may be OUT OF CONTROL if 8 successive points occurring on either side of the centerline avoid zone C Process MeanUpper Control LimitLower Control LimitABCABC ??? ??? ? ? 7Sinderella LiuTest 8: Run in Zone C Test☆ Applies for X chart only☆ Process may be OUT OF CONTROL if 15 successive points fall in zone C only, to either side of the centerlineProcess MeanUpper Control LimitLower Control LimitABCABC? ? ??? ??? ?? ??? ??8Sinderella LiuPp (Process Performance): ☆ Pp is the performance index which is defined as the tolerance width divided by the process variation. ,whereAndhere “n”referstothetotalnumberofalloftheindividualvaluessampled.Sinderella LiuPpk (Process Performance Index): ☆ Ppk is the performance index which accounts for process centering and is defined as the minimum of (Note:BothPpandPpkshouldbeusedonlytoparetoorwithCpandCpkandtomeasureandprioritizeimprovementovertime.),whereorSinderella LiuCp (Capability of Precision): ☆ Cp is the capability index which is defined as the tolerance width divided by the process variation, irrespective of process centering. ,where istheestimatedstandarddeviationby,hereistheaverageofthemovingrangesandd2isaconstantvaryingbythesamplesizen,usedingroupingthemovingrangesasshowninthepartialtablebelow:n 2 3 4 5 6 7 8 9 10d2 Sinderella LiuCpk (Process Capability Index): ☆ Cpk is the capability index which accounts for process centering and is defined as the minimum of isdefinedaspreviouspage.It relates the scaled distance between the process mean and the closest specification limit to half the total process spread. ,whereorSinderella Liu~ The End ~Sinderella Liu謝謝觀看 /歡迎下載BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAI
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