JIS A1964 ERRATUM 1-2008 勘误表

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【英文标准名称】:StandardPracticeforProcessandMeasurementCapabilityIndices
【原文标准名称】:能力指数处理和测量的标准实施规程
【标准号】:ASTME2281-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E11.30
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:long-termvariability;processcapability;processcapabilityindices;processperformance;processperformanceindices;short-termvariability;Capabilityindices;Long-termvariability;Observation/observedvalues;Performance--laboratoryinstrumen
【摘要】:ProcessCapability8212;Processcapabilitycanbedefinedasthenaturalorinherentbehaviorofastableprocessthatisinastateofstatisticalcontrol(1).Ax201C;stateofstatisticalcontrolx201D;isachievedwhentheprocessexhibitsnodetectablepatternsortrends,suchthatthevariationseeninthedataisbelievedtoberandomandinherenttotheprocess.Processcapabilityislinkedtotheuseofcontrolchartsandthestateofstatisticalcontrol.Aprocessmustbestudiedtoevaluateitsstateofcontrolbeforeevaluatingprocesscapability.ProcessControl8212;Therearemanywaystoimplementcontrolcharts,butthemostpopularchoiceistoachieveastateofstatisticalcontrolfortheprocessunderstudy.Specialcausesareidentifiedbyasetofrulesbasedonprobabilitytheory.Theprocessisinvestigatedwheneverthechartsignalstheoccurrenceofspecialcauses.Takingappropriateactionstoeliminateidentifiedspecialcausesandpreventingtheirreappearancewillultimatelyobtainastateofstatisticalcontrol.Inthisstate,aminimumlevelofvariationmaybereached,whichisreferredtoascommoncauseorinherentvariation.Forthepurposeofthisstandard,thisvariationisameasureoftheuniformityofprocessoutput,typicallyaproductcharacteristic.ProcessCapabilityIndices8212;Thebehaviorofaprocess(asrelatedtoinherentvariability)inthestateofstatisticalcontrolisusedtodescribeitscapability.Tocompareaprocesswithcustomerrequirements(orspecifications),itiscommonpracticetothinkofcapabilityintermsoftheproportionoftheprocessoutputthatiswithinproductspecificationsortolerances.Themetricofthisproportionisthepercentageoftheprocessspreadusedupbythespecification.Thiscomparisonbecomestheessenceofallprocesscapabilitymeasures.Themannerinwhichthesemeasuresarecalculateddefinesthedifferenttypesofcapabilityindicesandtheiruse.Twoprocesscapabilityindicesaredefinedin5.2and5.3.Inpractice,theseindicesareusedtodriveprocessimprovementthroughcontinuousimprovementefforts.Theseindicesmaybeusedtoidentifytheneedformanagementactionsrequiredtoreducecommoncausevariation,compareproductsfromdifferentsources,andtocompareprocesses.ProcessPerformanceIndices8212;Whenaprocessisnotinastateofstatisticalcontrol,theprocessissubjecttospecialcausevariation,whichcanmanifestitselfinvariouswaysontheprocessvariability.Specialcausescangiverisetochangesintheshort-termvariabilityoftheprocessorcancauselong-termshiftsordriftsoftheprocessmean.Specialcausescanalsocreatetransientshiftsorspikesintheprocessmean.Eveninsuchcases,theremaybeaneedtoassessthelong-termvariabilityoftheprocessagainstcustomerspecificationsusingprocessperformanceindices,whicharedefinedin6.2and6.3.Theseindicesaresimilartothoseforcapabilityindicesanddifferonlyintheestimateofvariabilityusedinthecalculation.Thisestimatedvariabilityincludesadditionalcomponentsofvariationduetospecialcauses.Sinceprocessperformanceindiceshaveadditionalcomponentsofvariation,processperformanceusuallyhasawiderspreadthantheprocesscapabilityspread.Thesemeasuresareusefulindeterminingtheroleofmeasurementandsamplingvariabilitywhencomparedtoproductuniformity.1.1Thispracticeprovidesguidancefortheuseofcapabilityindicesforevaluatingprocesscapabilityandperformance.Processcapabilityindicescomparethevariabil......
【中国标准分类号】:N04
【国际标准分类号】:25_040_40
【页数】:8P.;A4
【正文语种】:英语


【英文标准名称】:ISOgeneralpurposemetricscrewthreads--Tolerances--Part2:Limitsofsizesforgeneralpurposeexternalandinternalscrewthreads--Mediumquality
【原文标准名称】:ISO通用米制螺纹.公差.第2部分:通用外螺纹和内螺纹尺寸的限值.中等质量
【标准号】:JISB0209-2-2001
【标准状态】:现行
【国别】:日本
【发布日期】:2001-12-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonMachineElements
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:この規格は,JIS10205-3で規定する一般用メートルねじ(M)の有効径及び山の頂の直径(めねじ内径及びおねじ外径)に対する許容限界寸法について規定する。なお,JISB0205-3で規定する一般用メートルねじは,JISR0205-lによる基準山形をもっている。この規格に示すはめあい区分に対する許容限界寸法は,JISB0209-1で規定している基礎となる寸法許容差及び公差から導きだした。備考この規格の対応国際規格を,次に示す。なお,対応の程度を表す記号は,ISO/IECGuide21に基づき,IDT(一致している),MOD(修正している),NEQ(同等でない)とする。
【中国标准分类号】:J04
【国际标准分类号】:21_040_10
【页数】:26P;A4
【正文语种】:日语