The Application of Accelerated Testing Methods and Theory (HALT and HASS)

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1、TheApplicationofAcceleratedTestingMethodsandTheory(HALTandHASS)QualMarkCorporationRepresentedByAdvantageTechnicalSales,Inc.NeillDoertenbach(303)828-4955PresentationOverview•OverviewofHALTandHASS•Understandingthedifferencesinthepurposeandprocess•HALTandHASSHow-To•TheTool

2、sYouNeed•ManagementIssues•ThePoliticalAspectsofHALTandHASS•VariationsontheTheme•CaseStudiesTheAcronyms•HALT:HighlyAcceleratedLifeTesting–DesignVerificationTool•HASS:HighlyAcceleratedStressScreen–ProductionTest•DVT:DesignVerificationTestingMoreAcronyms•UDL-UpperDestructL

3、imit(tempandvibration)•UOL-UpperOperatingLimit(tempandvibration)•LOL-LowerOperatingLimit(temperature)•LDL-LowerDestructLimit(temperature)•FLT-FundamentalLimitofTechnologyTheoryandBenefitsWhatWeDoandWhyWeDoIt…EconomicRationaleFindingdesignweaknessesasearlyintheproductdes

4、igncycleaspossible,canaddsubstantiallytothebottomline.!$35Designphase!$175Beforeprocurement!$368Beforeproduction!$17,000Beforeshipment!$690,000Atcustomersite~HiroshiHamada,RicohChairmanTheBenefitsofHALT•Quicklydiscoverdesign&processlimitations.•Evaluate&improvedesignmar

5、gins.•Characterizestatisticalinformationonmargins.•Substantiallyincreaseproductreliability(MTBF).•Reducedevelopmenttime&cost.•Eliminatedesignproblemsbeforereleasetomanufacturing.•Sustainingengineeringtooltoassesschangesmadetoproduct.HALTisadesignprocessruggedizationtool

6、forthedesigners.Therearenopre-establishedlimits.HALTFundamentals•HALTisnotatestyoupassorfail,itisaprocesstoolforthedesignengineers.•Therearenopre-establishedlimits-theproductdeterminesthelimits.•Stresstofailure.•Itiscriticaltomonitortheproductduringstressing.HALTvs.DVTD

7、ifferentPurpose,DifferentResults•DVT•HALT–Verifiesthatproduct–Stressesproductbeyondmeetsspecificationspecification–Verifiesthatproductwill–Stressesproductuntilfunctioninitsintendedweakpointsfailenvironment–Determinesfunctionaland–Issuccessfulwhendestructlimitsproductsho

8、wsno–IssuccessfulwhenfailurefailuresmodesarefoundandeliminatedAKEYDifference...•HALTisnot-youcan•DVTisa“Pass/F