Analysis of U-scan machines Group 4 Olivia Tran Jamie Tran Josh Wortman Calvin Hsu Oscar Guerrero Shawn Flynn Andrew Wong Todd Espiritu Santo

Analysis of U-scan Analysis of U-scan machinesmachines

Group 4Group 4Olivia Tran Olivia Tran Jamie TranJamie TranJosh Wortman Josh Wortman Calvin HsuCalvin HsuOscar Guerrero Oscar Guerrero Shawn FlynnShawn FlynnAndrew Wong Andrew Wong Todd Espiritu SantoTodd Espiritu Santo

The U-Scan ExpressThe U-Scan Express

The Facts Behind the MachineThe Facts Behind the Machine

Started in the early 1990’sStarted in the early 1990’s

Designed to save on operating costsDesigned to save on operating costs

Available in several national store chains Available in several national store chains (Ralphs, Home Depot, Wal-Mart, etc…)(Ralphs, Home Depot, Wal-Mart, etc…)

Multiple modelsMultiple models

FunctionalityFunctionality

Place items on the holderPlace items on the holder


Initiate user interface softwareInitiate user interface software Select languageSelect language Scan Ralphs Club CardScan Ralphs Club Card Scan items inScan items in


Scan in the items and place into bagsScan in the items and place into bags

Scanning device User Interface


Checking out and payingChecking out and paying

Payment device User Interface

Analysis: User InterfaceAnalysis: User Interface

ProsPros Gives feedback for Gives feedback for

most operationsmost operations Monitor position Monitor position Button labelsButton labels Bi-ModalBi-Modal Back buttonsBack buttons


ConsCons Grouping of buttons Grouping of buttons Absence of feedback Absence of feedback

on some operationson some operations


ConsCons Grouping of buttons Grouping of buttons Absence of feedback Absence of feedback

on some operationson some operations

Analysis: Scanning and BaggingAnalysis: Scanning and Bagging

ProsPros Beep indicationsBeep indications Walk through stepsWalk through steps Visual FeedbackVisual Feedback


ConsCons Poor bag anchorsPoor bag anchors No indication of where No indication of where

to place extra bagsto place extra bags Weighing foods and Weighing foods and

your handyour hand


ConsCons Poor bag anchorsPoor bag anchors No indication of where No indication of where

to place extra bagsto place extra bags Weighing foods and Weighing foods and

your handyour hand

Analysis: Payment and CheckoutAnalysis: Payment and Checkout

ProsPros CouponsCoupons Variety of Payment Variety of Payment

methodsmethods Combine Payment Combine Payment

methodsmethods

Analysis: Payment and CheckoutAnalysis: Payment and Checkout

ConsCons Where is the Receipt?Where is the Receipt? Double promptDouble prompt Can’t use bills over Can’t use bills over

$20$20

““Breaking” the MachineBreaking” the Machine

Subject: New user Subject: New user ToddTodd Fairly easy, no errors Fairly easy, no errors

encounteredencountered

Subject: Veteran user Subject: Veteran user OscarOscar Handles complex Handles complex

errors wellerrors well

Usability AnalysisUsability Analysis

QuestionnaireQuestionnaire Reasons to useReasons to use Ease of useEase of use

Taken during Taken during weekends at busy weekends at busy timestimes

45 samples45 samples

• User Statistics


ExperiencedExperienced NoviceNovice

NN 3737 88

Mean AgeMean Age 2929 3030

Mean Items Mean Items PurchasedPurchased 6.46.4 4.74.7

Credit Card50%

Check3%

Bank Card22%

Cash25%

Credit Card,

(6)

Cash(2)

• Method of Payment

Experienced Novice


Yes35%

No3%

Sort of62%

Sort of 74%(6)

Yes13%(1)

No, 13%(1)

• Ease of Use

Experienced Novice

UsabilityUsability AnalysisAnalysis

• User Experience


Used toUsed to save timesave time 92%92% 63%63%

Used toUsed to save time, & save time, & feelfeel they saved timethey saved time

91%91% 50%50%

Did not use to save Did not use to save time but feel they time but feel they saved anywayssaved anyways

67%67% 33%33%

Experienced Novice

•

•

•

InstructionsInstructions

ClearClear 97%97% 43%43%

Not ClearNot Clear 0%0% 29%29%

Did Not ListenDid Not Listen 3%3% 29%29%

Opinion of Computer VoiceOpinion of Computer Voice

PleasantPleasant 36%36% 14%14%

AnnoyingAnnoying 22%22% 29%29%

No OpinionNo Opinion 42%42% 57%57%

Experienced Novice


• User Experience

Experienced Novice


• User Experience: Overall Opinion

Rated Experience of…Rated Experience of…

Checking the itemsChecking the items 2.732.73 2.382.38

Interacting withInteracting with the touch screenthe touch screen 2.952.95 2.382.38

Completing paymentCompleting payment 2.842.84 2.252.25

Using the following rating scale, please circle your rating for the following questions:

1= Confusing & Problematic2= Some problem or difficulty3= Easy, no problem

DESIGNER USER

SYSTEM

DESIGN MODEL USER’S MODEL

SYSTEM IMAGE

P.O.E.T., p. 190

Does the USCAN employ a Does the USCAN employ a user centered designuser centered design????

Seven Principles for Transforming Difficult Tasks into Seven Principles for Transforming Difficult Tasks into Simple Ones:Simple Ones:

1.1. Use knowledge in the world and knowledge in the head.Use knowledge in the world and knowledge in the head.

2.2. Simplify the structure of tasksSimplify the structure of tasks

3.3. Make things visibleMake things visible

4.4. Get the mappings rightGet the mappings right

5.5. Exploit the power of constraintsExploit the power of constraints

6.6. Design for errorDesign for error

7.7. When all else fails, standardizeWhen all else fails, standardize

Does the USCAN hold to Norman’s seven principles??Does the USCAN hold to Norman’s seven principles??

U-Scan vs. CashierU-Scan vs. Cashier

U-ScanU-Scan Privacy Privacy Feel in control Feel in control Go at your own paceGo at your own pace Item list with pricesItem list with prices Saves timeSaves time Cost effectiveCost effective

CashierCashier ComfortComfort Bagging handled for Bagging handled for

you (no squished you (no squished bread)bread)

Price checksPrice checks Quick error fixesQuick error fixes

RecommendationsRecommendations

User interface:User interface: Group buttons by Group buttons by

functionfunction


User interface:User interface: Add an animation for Add an animation for

processingprocessing


Scanning and Scanning and Bagging:Bagging: Anchor the bag holderAnchor the bag holder Large sign to show Large sign to show

where to put overflow where to put overflow bagsbags


Payment:Payment: Receipt should be Receipt should be

moved closer to the moved closer to the monitor monitor

Get rid of the double Get rid of the double promptprompt

ConclusionConclusion

Overall rating 9/10Overall rating 9/10

Special thanks to manager manSpecial thanks to manager man

Josh had a traumatic employee incidentJosh had a traumatic employee incident

Documents

Analysis of U-scan machines Group 4 Olivia Tran Jamie Tran Josh Wortman Calvin Hsu Oscar Guerrero Shawn Flynn Andrew Wong Todd Espiritu Santo