Design-Expert-8.0使用指南-系统专业教程(响应面学习-RSM)

DX8-06-Combined.docxxRev.12/8/09Design-Expert8User’sGuideCombinedMixture-ProcessTutorial1CombinedMixture-ProcessTutorialIntroductionDesign-Expert®softwareoffersdesignsthatcombinemixturecomponentsandprocessfactors(numericand/orcategoric).Beforeembarkingonthistutorial,youshouldfirstcompletetheprevioustutorialsonmixturedesign:Part1–TheBasics,andPart2–Optimization.Fordetailsaboutsoftwarefeaturesandtheirstatisticalaspects,usetheon-screenprogramHelp.Also,Stat-Easeprovidesin-depthtraininginitsadvancedworkshopformixturedesign.Callforinformationoncontentandschedules,orbetteryet,visitourwebsiteat’suniquefeaturesformixture-processdesignandanalysisbyinvestigatingJohnCornell’sfamousfish-pattyexperimentfromhistextbookExperimentswithMixtures,3rdedition,publishedbyJohnWileyandSons,NewYork.Thefoodformulatorshopetomakesomethingdeliciousfromablendofthreetasty-sounding(?)fish:mullet,sheepshead,andcroaker.Yum!Thesevenblendsinthedesignincludeoneeachofthethreefishes,plusthreebinaryblends,andablendofone-thirdeachoftheindividualtypesoffish.Thefishpattiescanbecookedatvaryingdeep-fryingtime,oventemperature,andoventime.Combiningeachoftheseprocessfactorsattwolevelsforallsevenblendscreatesatotalof56experimentalruns.Thediagrambelowshowstheblendsaspointsontriangles,repeatedateachoftheeightcornersofacuberepresentingtheprocess.Fish-pattydesign:Sevenblends(ontriangles)ateightprocesscombinations(cube)Theresponsemeasureispattytexture.(Nevermindabouttaste!)TheExperimentasOriginallyRunStarttheprogrambyfindinganddoubleclickingtheDesign-Expertsoftwareicon.TakethequickestroutetoinitiatinganewdesignbyclickingtheNewDesignoptiononouropeningscreenasshownbelow.AnotherrouteisviaFile,NewDesign(orassociatedAltkeys).2CombinedMixture-ProcessTutorialDesign-Expert8User’sGuideOpeningscreen–NewDesignoptionhighlightedinredClicktheCombinedfoldertabandselecttheUserDefinedoption.Theuser-definedoptionallowsyoutoreproduceCornell’sdesignwithallpointschosen.Normally,tosaveonruns,youwanttousethefirstchoiceonthelist,Optimal,whichselectsanidealsubsetofdesignpointsfromacandidatesetforaspecifiedmodel.We’llexplorethisoptionlater.ForMixture1Components,select3fromthedroplist.(NoticethatDesign-Expertofferstheoptionforaddingasecondmixture,forexampleinatwo-layercake,film,orcoating.ForthenumberofNumericFactorschoose3.LeaveCategoricFactorsatzero,butkeepinmindforfutureexperimentationthatyoucanadddiscretevariables–suchaswhosuppliesagivencomponent.Specifyingthecombineduser-defineddesignPressContinueandentertheTotalformixturecomponents(fishtypes)at100andUnitsas%.Thenenterfishnamesasshownbelow.Lowlimitsremainzero.Setallhighlimitsto100.EnteringmixturedetailsPressContinuetomoveontotheprocessdesignfactors.Enterfactornames,units,andranges(low–L[1]andhigh–L[2])asshownbelow.DX8-06-Combined.docxxRev.12/8/09Design-Expert8User’sGuideCombinedMixture-ProcessTutorial3EnteringprocessdetailsPressContinuetodefinethemodelyouwanttodesignforthecombinationofmixtureandprocessvariablesinthisexperiment.Thedefaultmodelisquadraticbyquadratic.ClicktheEditmodelbuttonandchangethedefaultforProcessOrdertoLinear.SpecifyingthedesignmodelforthemixtureandprocessvariablesClicktheOKbuttontoimplementthechange.Now,consideryour“candidate”points.Normallyonlysomeofthesepointswouldactuallymakeittothedesign,butbychoosingtheUserDefinedoption,yougetallofthem.However,there’saproblem–theMixturecandidatesetofpoints(Mixturetabatupper-leftscreenbox)containsmorepointsthanthosechosenbyCornell.FixthisbyclickingoffThirdsofedges,Tripleblends,Axialcheckblends,andInteriorcheckblends.Onlyvertices,centersofedges,andoverallcentroidshouldnowbechecked.PressCalculatepointstogetacount–thissubtotalsto7forthemixturecandidatepoints.Candidatepointsformixture4CombinedMixture-ProcessTutorialDesign-Expert8User’sGuideNowclicktheProcesscandidatesetofpointstab(rightofMixturetab).ThisdesignalsocontainsmorepointsthanthosechosenbyCornell,soclickoffeverycheckmarkexceptVertices.PressCalculatepointstoupdatetotalruncount.CandidatepointsfortheprocessYoushouldnowseeasubtotalof8processcombinations,whichcombinedwiththe7mixturecandidatesgenerates56totalruns(points).PressContinuetoseetheresponsespecificationform.EnterAveTexturewithunitsofgm*10^-3.EnteringresponsenameandunitsPressContinuetocompletethedesign.Design-Expertnowdisplaysthe56experimentsinrandomrunorder.AnalyzetheResultsToviewresponsedata,right-clicktheResponsecolumnheaderandselectSimulateResponse.SimulatingtheresponseClickfileFishPatties.simandOpenit.DX8-06-Combined.docxxRev.12/8/09Design-Expert8User’sGuideCombinedMixture-ProcessTutorial5OpeningthefishpattysimulationThesimulationdisplaysitsprocessingrateatareadablespeedsoyoucanobservetheresponses,sobepatient–itmaytakeaminutetogenerateallthedata.Resultswithintherangeof2to3.5aredesirable.Topreservetheresponses,gotoFileandselectSaveAs.ChangethefilenametoFishPatties.dxporsomeotheruniquenameofyourchoice.Toanalyzethedata,clicktheAnalysisnodelabeledAveTexture.ThenclicktheFitSummarybutton.Younowseeauniquematr