Designing a Card Swipe Machine

1. Designing a Card Swipe Machine Paul Ritchey TanayaNalavade

2. Background • Why the card swipe machine? • Frequently used • Current designs have room for improvement

3. 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

4. Task Analysis / Contextual Observations • Collected user comments on existing machines

6. 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

7. Prototype Version 1 SWIPE CARD TO START [DIAGRAM ABOUT SWIPING THE CARD] 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9

8. CHOOSE PAYMENT TYPE Debit Credit 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9

9. ENTER PIN ** 1 2 3 ENTER 4 5 6 CLEAR CANCEL 7 8 9

10. Testing the Design • Users told to complete a debit transaction use the prototype • Record task time • Errors • And any comments • 19 users tested

11. 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

12. 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

13. 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

14. 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”

15. Prototype V3 • Language support • Card Diagram • Use real image • Font standardization • Zero illuminates

16. SWIPE CARD TO START en Español ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

17. CHOOSE PAYMENT TYPE Debit Credit ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

18. ENTER YOUR PIN ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

19. Summary of Project • User Profile • Task Analysis • Usability Requirements • Create First Prototype • User Testing • Create Second Prototype • User Testing • Create Third Prototype

20. Questions?!

21. 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

22. 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

23. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

24. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN * ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

25. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

26. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN *** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

27. 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

28. 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

29. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

30. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

31. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

32. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ACCEPTED ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

33. 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

34. 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

35. 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

36. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN * ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

37. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN ** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

38. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 ENTER PIN *** ENTER 1 2 3 CLEAR 4 5 6 CANCEL 7 8 9 0

39. 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

40. 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

41. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

42. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

43. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 PROCESSING ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

44. 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

45. 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

46. 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

47. 1654 6874 9687 9846 JOHN JACOB DOE 06/13 TRANSACTION CANCELED! ENTER 1 2 3 CLEAR 4 5 6 7 8 9 CANCEL 0

48. 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

49. 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

50. 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