【英文标准名称】:VariablesSamplingofMetallicandInorganicCoatings
【原文标准名称】:金属涂层和无机物涂层的不同抽样
【标准号】:ASTMB762-1990
【标准状态】:现行
【国别】:美国
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:抽样方法;覆层;金属覆层;金属的;无机物的
【英文主题词】:metalcoatings;metallic;coatings;inorganic;samplingmethods
【摘要】:
【中国标准分类号】:A29
【国际标准分类号】:25_220_30;25_220_40
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:Reliabilityoffibreopticinterconnectingdevicesandpassiveopticalcomponents-Productscreening
【原文标准名称】:光纤互连装置和无源光学部件可靠性.产品屏蔽
【标准号】:BSEN62005-4-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-03-15
【实施或试行日期】:2000-03-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:纤维光学连接器;纤维光学;设计;光学纤维;产品试验;失效;可靠度;质量控制;衰弱率
【英文主题词】:Adjustment;Adjustments;Classifications;Components;Connectiontechnology;Connectoredjoints;Damping;Dampingcapacity;Electricplugs;Fasteners;Fibreoptics;Glassfibrecables;Glassfibres;Measuringtechniques;Methods;Monomodefibres;Opticalwaveguides;Producttests;Reliability;Testing;Validation
【摘要】:ThisInternationalStandarddescribesproductscreening.Aproperproductscreenisactuallyaprocess,notatest.Asaprocess,itismaintainedandconstantlyvalidatedtoensureitachievesthepurposeforwhichitwasdefined.Thisprocessisappliedtoaproductinordertoinduceproductswithaknownfailuremechanism,tofailinacontrolledsituationbeforetheproductisdeployedinthefield.Ifthisprocessisproperlyapplied,thenallinfantmortalityfailuresinthefield,associatedwiththefailuremechanism(s)forthescreen,willbeeliminated.Figure1showstheclassical"bathtub"three-regioncurveoffailureratesformostproducts.Althoughthefailureratesofpassiveopticalcomponentshavenotbeenconclusivelyshowntofollowthiscurve,itisusefulforillustrativepurposes.Screeningisknownforsomeproductsasaproofstressorinthecaseofelectronics,asa"burn-inprocess".Whenappliedtoaproduct,itwillnormallyaffectthefailurerateappliedduringtheinfantmortalityportionoftheproductlifecycle.Ifthescreenisproperlychosen,itwillinduceaportionoftheinfantmortalityfailurescausedbythechosenfailuremechanism(s)tooccurinthemanufacturingcycle,earlierthanwouldnormallybeseenintheunscreenedpopulationshowninthedashedline.Also,itshouldbenotedthataproperlyappliedscreendoesnotweakenordegradethewear-outorendoflifeperformanceofaproductpopulation.Inanycase,thescreenshouldalsonotaffectthemiddleregionofnormallifeutilization.Screeningandthedecisiontoapplyascreentoaproductprocessshouldneverbearequirement.Itshouldbedesignatedasanoptionoranalternative.Onceproducttestingidentifiesafailuremechanisminapopulationorsub-populationofaproduct,screeningtoremovethatmechanismisonlyonealternative.Equallyvalid,andinmostcasespreferable,isthealternativetomakedesignormanufacturingprocessimprovementstoeliminatethemechanism.Obviously,anychangestotheproductarethenrevalidated,andthescreenisrevalidatedaswell.However,thedecisiontochoosewhethertoscreenorimprovetheproductshouldbebasedoneconomics,customerexpectations,andproductuse.
【中国标准分类号】:L23
【国际标准分类号】:33_180_20
【页数】:8P.;A4
【正文语种】:英语