HFE Project Lab 2
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FunctionSubtaskIdentify Critical ElementsObservations From QuestionsPotential HF ProblemsRecommendations
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Main Function 1SubtaskCognitivePerceptualMotorStressEquipmentProceduresHumansEnvironment
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Put on/remove case in less than 10 seconds
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Attach case to phone
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select appropriate fitting caseA wide variety of case sizes should be availableCase size should be clearly labeled on packagingPackaging should include important information in multiple common languagesMaterial should be comfortable to holdPeople may not be able to identify the correct case size for their phone, or it may not existMark cases clearly in multiple languages; have wide selection of sizes
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checking case alignmentCase should fit snugly around phoneProper alignment of case and phone should be intuitiveCase should be light and not make the phone much heavierCase should not make access to phone buttons difficultPeople may try to put the case on backwardsProper alignment should be clearly indicated by case shape or listed in instructions
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fit phone in placeCase must easily attach to phoneAppropriate instructions should be providedCase material should be easy to grip and slip out of one's handsCase should not dampen phone vibrations or hamper normal phone usePeople may struggle to attach the case to the phoneMake sure cases slide on easily and provide instructions
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flexible case and frustration-free packagingPackaging should be easy for humans to open and not have sharp edgesIt should be obvious how to open the packaging, or instructions should be providedMaterial should be safe for skin contact, easy to gripPeople may be unable to open the package or have difficultyMake packaging intuitive and easy to open; do not force users to cut or rip open hard plastic leaving sharp edges
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Remove case from phoneCase is mean to be removed when not in useCase should be intuitive to remove.
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decide to remove caseCase should not be able to be removed unintentionallyDon't want it to be too easy to remove, but also don't want to make it difficultUser testing to determine how tightly the case should fit
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locate optimal case removal spotThere is ample room to grab and manipulate the case to remove itShould have a tab/notch so it can be removed without much visual inspection
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separate case from phoneCase is made so that it can easily be removed
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flexible case prevents breakingPhone case is built durable enough that it can be removed many times without breaking during its lifetimeShould be easy enough to remove, but not easy that it would detach with normal use of phone
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Main Function 2
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Set up app (initial) in less than 1 minThere should be an initial walkthrough through the menus when the app is first installedSet up should be easy to execute after the tutorial
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Allow permissions (5 sec)
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process pop-up window, acceptWindow should stand out from the backgroundPrompt should be minimal/easy to read and understandPeople without technical knowledge could get confused/overwhelmedMake sure prompt has only truly relevant information
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identify "agree" buttonThe agree button should be easily identifiableAgree button should follow logical "accept" button standards (be highlighted, bottom right corner)
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tap "agree" to proceedagree button is large enough to help prevent misclicks
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simple instructions limit an excess of clicks requiredUser should not have to think much through accepting
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Sensor calibration (30 sec)
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interpret calibration locale in appmenu diving should be simple and straightforward
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identify "calibrate" buttonbutton should stand outCalibration button should be easily identifiable (within settings)Could be hard for a user to find initiallyInclude a tutorial upon first app launch on how to calibrate sensor
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tap "calibrate" to begin calibrationbutton is large enough to prevent misclicks
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calibration happens automatically by/from the app, no additional clicks
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Adjust settings (including detection distance, notifications, etc.) (20 sec)Settings should be easy to use. The sensor can work in multiple situations so it is important that the settings can be changed easily.Settings should be easy to interpret, especially after the intial setup tutorial. All options should have an explanation or graphic to go alongSettings should be highly customizable to fit each individual's preferences
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interpret settings optionsEverything is easily legible and stands out from eachotherShould follow typical app conventions (gear icon in a top corner of the main app screen)First time users could be confused about accessing or changing settingsApp tutorial with first app launch
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identify buttons for adjustmentsButton stands outOptions are clearly labeled/explainedSettings should be easy to read in most light levels/environments
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tap/slide buttons to user's preferencebuttons and sliders are easy to controlShould use standard sliders and on/off switches
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simple settings options limit an excess of user adjustmentsOne page of settings max. would be optimal (no scrolling, navigating multiple menus, etc.)
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