ISO 04120-2021.docx

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1、INTERNATIONA1.STANDARDISO4120editionThrd2021-03Sensoryana1.ysisMethodo1.ogy一Triang1.etestAna1.yseSensorie1.1.eMdthodo1.ofjieEssaitriangu1.aireCOPYRIGHTPROTECTEDDOCUMENTISO2021岫rkdea/山thUcdOthcnviscjftc三orrtmcehDVBiwixuioiti08phnn11UatiocBhrhotocp)Mng,ptbcatonpostingontheinternetoranintranet,withoutp

2、riorwrittenpermission.PermissioncanherequestedfromeitherISOattheaddressbe1.oworISsmemberbodyinthecountryoftherequester.%,tft晒Iandonnet8CH-1214*crnicr,GenevaPhone：M1.22749O1.11Pub1.ishedinSwitzerhndISO2021-A1.1.rightsreservedContentsPageforewordiv2Scope一13Normativereferences1Termsanddefinitions14.Pri

3、ncip1.e2/Genera1.testconditionsandrcauireinents2Assessors36.1Qua1.iRcation376.2Numberofassessors3OProcedure4OAna1.ysisandinte-pretationofresu1.ts一一48.1Whentestingforadifference498.2Whentestingforsimi1.arity5r:Thisisa1.soknownasType1error,significance1.eve1.orfa1.sepositiverate.ISO2021-A1.1.rightsres

4、ervedThisdocumentspecifiesaprocedurefordeterminingwhetheraperceptib1.esensorydifferenceormethodexistswhetherofCwoexistsinaThemethodisinsevera1.attributes.Themethodisstatistica1.1.ymoreefficientthantheduo-triotest(describedinISO10399),buthasThemethodisapp1.icab1.eevenwhenthenatureofthedifferenceisunk

5、nowni.e.itdeterminesneitherthesizenorthedirectionofdifferencebetweensamp1.es,noristhereanyindicationoftheattribute(三)Themethodiseffectivefor:1) eitheraperceptib1.edifferenceresu1.ts(triang1.etestingfordifference);when,forexamp1.e,achangeismadeiningredients,processing,packaging,hand1.ingorstorage;2se

6、1.ecting,trainingandThefo1.1.owingdocumentsofthisreferredinthetextsuchawaythattheoroftheirForundatedreferences,the1.atesteditionofthereferenceddocument(inc1.udinganyamendments)app1.ies.ISO8589,Sensoryana1.ysisGenera1.guidanceforthedesignoftestroomsForthepurposesofthisdoment1.thetermsanddefinitionsgiveninISO5492andthefo1.1.owingapp1.y.-ISOOn1.inebrowsingp1.atform:avai1.ab1.eathttps:/www.iso.org/obpprobabi1.it