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Designing a Card Swipe Machine. Paul Ritchey Tanaya Nalavade. Background. Why the card swipe machine? Frequently used Current designs have room for improvement. Understanding the User. Administered online questionnaire n = 47 Often use card swipe machine
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Designing a Card Swipe Machine Paul Ritchey TanayaNalavade
Background • Why the card swipe machine? • Frequently used • Current designs have room for improvement
Understanding the User • Administered online questionnaire • n = 47 • Often use card swipe machine • Often or Always use debit/credit cards • Card preferred over cash • English generally first language • Around 50% have corrected vision • No one was color blind
Task Analysis / Contextual Observations • Collected user comments on existing machines
Usability Goals & Requirements • Ease of Use • No more than 1 error per task for a novice user • Task times less than 30 seconds • All buttons shall be physical • Design shall utilize color • Enter = Green • Cancel = Red • Clear = Yellow • Buttons shall illuminate when usable • Screen displayed options shall be graphically connected to their corresponding physical buttons • Buttons should be labeled
Prototype Version 1 SWIPE CARD TO START [DIAGRAM ABOUT SWIPING THE CARD] 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9
CHOOSE PAYMENT TYPE Debit Credit 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9
ENTER PIN ** 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9
Testing the Design • Users told to complete a debit transaction use the prototype • Record task time • Errors • And any comments • 19 users tested
Results • Debit Transaction • Avg Time: 24.7 seconds • Only Pin Errors • User Comments • “no zero key” • Easy to use • Over all well accepted • Not all the buttons lit up
Revisiting the Design • Creation of prototype Version 2 • Added swipe example diagram • Button illumination extended to Enter, Cancel, and Clear • Added a zero key • Fixed task order problem • Prototype Version 2
V2 User Testing Results • User testing protocol changes • Asked to perform both tasks • Exploring the prototype • Semi-Structured interview • Small sample size (n = 5) • Over all positive response • No card swipe errors • Task Times (avg) • Debit = 15 • Credit = 12.6
V2 User Testing Results • Validation of design changes • Progress bar • Illumination of buttons • User Comments and Issues • Zero did not illuminate • “Shouldn’t use ‘!’” • “Swipe diagram is good” • Should standardize text • “Card Diagram might be too unrealistic”
Prototype V3 • Language support • Card Diagram • Use real image • Font standardization • Zero illuminates
SWIPE CARD TO START en Español ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
ENTER YOUR PIN ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
Summary of Project • User Profile • Task Analysis • Usability Requirements • Create First Prototype • User Testing • Create Second Prototype • User Testing • Create Third Prototype
SWIPE CARD TO START 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN * ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN *** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PRESS ENTER TO PROCEED **** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 Yes IS THIS AMOUNT CORRECT ? $15.46 No ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ACCEPTED ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 TRANSACTION COMPLETED THANK YOU ! ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 SWIPE CARD TO START ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN * ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN *** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PRESS ENTER TO PROCEED **** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 Yes IS THIS AMOUNT CORRECT ? $15.46 No ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 INCORRECT PIN NUMBER ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 SWIPE CARD TO START ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 TRANSACTION CANCELED! ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 SWIPE CARD TO START ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0
1654 6874 9687 9846 JOHN JACOB DOE 06/13 TRANSACTION COMPLETED THANK YOU ! ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0