ISO 04120-2021.docx

INTERNATIONA1.STANDARDISO4120editionThrd2021-03Sensoryana1.ysisMethodo1.ogy一Triang1.etestAna1.yseSensorie1.1.eMdthodo1.ofjieEssaitriangu1.aireCOPYRIGHTPROTECTEDDOCUMENT©ISO2021岫rkdea/山thUcdOthcnviscjft<c三orrtmcehDVBiwixuioiti08phnn11UatiocBhr<1.>hotoc<>p)Mng,ptbcatonpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanherequestedfromeitherISOattheaddressbe1.oworIS<smemberbodyinthecountryoftherequester.%,tft晒Iandonnet8CH-1214*crnicr,GenevaPhone：M1.22749O1.11Pub1.ishedinSwitzerhnd©ISO2021-A1.1.rightsreservedContentsPageforewordiv2Scope一13Normativereferences1Termsanddefinitions14.Princip1.e2/Genera1.testconditionsandrcauireinents2Assessors36.1Qua1.iRcation376.2Numberofassessors3OProcedure4OAna1.ysisandinte-pretationofresu1.ts一一48.1Whentestingforadifference498.2Whentestingforsimi1.arity5<cTestreport5Precisionandbias-一.5AnnexA(normative)Tab1.es7AnnexB(informative)Examp1.es12Bib1.iography17ForewordISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.standardsttiugh(ISOtn11hnkoibMdm11t38wcekdHPfff1.QbBcgbody1tf1.r三dtiJMiai6tandrifc.ibwwhtd1.yCanttodHJiXmitteehasbeenestab1.ishedhastherighttoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-governmenta1.,in1.iaisonwithISO,a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththee1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.1.mattersofTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceare。瑟料福也槛OfISO/IEC出陶曲俺瓶1.b1.not龄&礴蝴的K醵卿1j¾罚fer%srdance酚Fhtheeditoria1.ru1.esofthe1SOIECDirectives.Part2(seewww.iso.org/dircc1.ives).时歌ionrightsd般掂棚15脚蝴橱卿SnSi嘏趣出即的植般眈doc1.三崎翩舟硼hsubjectofanypatentrightsidentifiedduringthedeve1.opmerUW4io÷uwMM41.beintheIntroductionand/orontheISO1.istofpatentdec1.arationsreceived(seewww.iso.org/pa1.ents).Anytradeusedinthisconstitutenameendorsement,documentisinformationgivenfortheconvenienceofusersanddoesnotForanexp1.anationofthevo1.untarynatureofstandards,themeaningofISOspecifictermsand哪蝴蜘明瓶ationc。的福P奥爽融Mthe可般IIi潴冉曲隔tion曲醛用无陋蛔嘛思幅isoforeword.htn1.私掘部郦n怖SthCPn三甜酰圈楣i蕊碗喇微IdizationS施购n麻肝由网幽微曲/盘CEN/SSCO1.,FoodProducts,inaccordancewiththeAgreementontechnica1.cooperationbetweenISOandCEN(ViennaAgreement).的岫BheemGWW帕1H丽丽these,侬砌iftft崎甲班61.hichhasbeentechnica1.1.ythedocumenthasbeengenera1.izedbeyondfoodandbeverageapp1.ications；gff1.d蝌回轴i8ttettrThurstonianmode1.inadditiontotheprevious1.yemphasizedguessingAnyfeedbackorquestionsonthisdocumentshou1.dbedirectedtotheuser'snationa1.standardsbody.comp1.ete1.istingofthesebodiescanbefoundatWWW.iso.orgAnembers.htm1.Sensoryana1.ysisMethodo1.ogyTriang1.etest1 Scopesimi1.arityapp1.icab1.ebetweenSamp1.esdifferenceproducts.sing1.esensoryattributeforced-choiceprocedure.The1.imitedusewithproductsthatexhibitstrongcarryoverand/or1.ingeringf1.avours.responsib1.eforthedifference.Themethodisapp1.icab1.eon1.yiftheproductsarehomogeneous.a) determiningthat：2) aperceptib1.edifferencedoesnotresu1.t(triang1.etestingforsimi1.arity),b) Normativereferencesnonitoringassessors.constitutesrequirementsaredocument.Fordatedinreferences,on1.ySonieeditiona1.1.citedapp!ies.contentISO5492,Sensoryana1.ysisVocabu1.ary3TermsanddefinitionsISOandIECmaintaintermino1.ogica1.database、foruseinStandardizatiOnatthefo1.1.owingaddresses：3.1 IECE1.ectropedia:avai1.ab1.eathttp+/川vw.eIeetroPedia；。喇a1.pha-riskr1.skNote1toentr>r:Thisisa1.soknownasType1error,significance1.eve1.orfa1.sepositiverate.©ISO2021-A1.1.rightsreservedThisdocumentspecifiesaprocedurefordeterminingwhetheraperceptib1.esensorydifferenceormethodexistswhetherofCwoexistsinaThemethodisinsevera1.attributes.Themethodisstatistica1.1.ymoreefficientthantheduo-triotest(describedinISO10399),buthasThemethodisapp1.icab1.eevenwhenthenatureofthedifferenceisunknowni.e.itdeterminesneitherthesizenorthedirectionofdifferencebetweensamp1.es,noristhereanyindicationoftheattribute(三)Themethodiseffectivefor:1) eitheraperceptib1.edifferenceresu1.ts(triang1.etestingfordifference);when,forexamp1.e,achangeismadeiningredients,processing,packaging,hand1.ingorstorage;2se1.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