Designation:D5157−19StandardGuideforStatisticalEvaluationofIndoorAirQualityModels1ThisstandardisissuedunderthefixeddesignationD5157;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideprovidesquantitativeandqualitativetoolsforevaluationofindoorairquality(IAQ)models.Thesetoolsincludemethodsforassessingoverallmodelperformanceaswellasidentifyingspecificareasofdeficiency.Guidanceisalsoprovidedinchoosingdatasetsformodelevaluationandinapplyingandinterpretingtheevaluationtools.Thefocusoftheguideisonendresults(thatis,theaccuracyofindoorconcentrationspredictedbyamodel),ratherthanoperationaldetailssuchastheeaseofmodelimplementationorthetimerequiredformodelcalculationstobeperformed.1.2AlthoughIAQmodelshavebeenusedforsometime,thereislittleguidanceinthetechnicalliteratureontheevaluationofsuchmodels.Evaluationprinciplesandtoolsinthisguidearedrawnfrompasteffortsrelatedtooutdoorairqualityormeteorologicalmodels,whichhaveobjectivessimi-lartothoseforIAQmodelsandahistoryofevaluationliterature(1).2SomelimitedexperienceexistsintheuseofthesetoolsforevaluationofIAQmodels.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1356TerminologyRelatingtoSamplingandAnalysisofAtmospheres3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisstandard,refertoTerminologyD1356.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1IAQmodel,n—anequation,algorithm,orseriesofequations/algorithmsusedtocalculateav...
