lecture 10_user interface architecture design

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1、USMANFAROOQSF_USMAN@YAHOO.COMUSERINTERFACEDESIGN12TheUserInterfaceSystemusersoftenjudgeasystembyitsinterfaceratherthanitsfunctionality.Apoorlydesignedinterfacecancauseausertomakecatastrophicerrors.Pooruserinterfacedesignisthereasonwhysomanysoftwaresystemsareneverused.Userinterface

2、sshouldbedesignedtomatchtheskills,experienceandexpectationsofitsanticipatedusers.3TheUserInterfaceTypicalDesignErrorsLackofConsistencyToomuchmemorizationNoguidance/helpNocontextsensitivityPoorresponseUnfriendly4HumanFactorsinInterfaceDesignLimitedshort-termmemoryPeoplecaninstantane

3、ouslyrememberabout7itemsofinformation.Ifyoupresentmorethanthis,theyaremoreliabletomakemistakes.PeoplemakemistakesWhenpeoplemakemistakesandsystemsgowrong,inappropriatealarmsandmessagescanincreasestressandhencethelikelihoodofmoremistakes.5HumanFactorsinInterfaceDesignPeoplearediffere

4、ntPeoplehaveawiderangeofphysicalcapabilities.Designersshouldnotjustdesignfortheirowncapabilities.PeoplehavedifferentinteractionpreferencesSomelikepictures,someliketext.6GoldenRulesPlacetheuserincontrolReducetheuser’smemoryloadMaketheinterfaceconsistent7PlacetheUserinControlDefinein

5、teractionmodesinawaythatdoesnotforceauserintounnecessaryorundesiredactions.Provideforflexibleinteraction.Allowuserinteractiontobeinterruptibleandundoable.8PlacetheUserinControlStreamlineinteractionasskilllevelsadvanceandallowtheinteractiontobecustomized.Hidetechnicalinternalsfromth

6、ecasualuser.Designfordirectinteractionwithobjectsthatappearonthescreen.9ReducetheUser’sMemoryLoadReducedemandonshort-termmemory.Establishmeaningfuldefaults.Defineshortcutsthatareintuitive.Thevisuallayoutoftheinterfaceshouldbebasedonarealworldmetaphor.10MaketheInterfaceConsistentAll

7、owtheusertoputthecurrenttaskintoameaningfulcontext.Maintainconsistencyacrossafamilyofapplications.Ifpastinteractivemodelshavecreateduserexpectations,donotmakechangesunlessthereisacompellingreasontodoso.11UserInterfaceDesignProcess12UserInterfaceDesignProcess13UserInterfaceDesignPri

8、nciplesUIdesignmusttakeacc