Title: Analysis of U-scan machines
1Analysis of U-scan machines
- Group 4
- Olivia Tran Jamie Tran
- Josh Wortman Calvin Hsu
- Oscar Guerrero Shawn Flynn
- Andrew Wong Todd Espiritu Santo
2The U-Scan Express
3The Facts Behind the Machine
- Started in the early 1990s
- Designed to save on operating costs
- Available in several national store chains
(Ralphs, Home Depot, Wal-Mart, etc) - Multiple models
4Functionality
- Place items on the holder
5Functionality
- Initiate user interface software
- Select language
- Scan Ralphs Club Card
- Scan items in
6Functionality
- Scan in the items and place into bags
Scanning device
User Interface
7Functionality
Payment device
User Interface
8Analysis User Interface
- Pros
- Gives feedback for most operations
- Monitor position
- Button labels
- Bi-Modal
- Back buttons
9Analysis User Interface
- Cons
- Grouping of buttons
- Absence of feedback on some operations
10Analysis User Interface
- Cons
- Grouping of buttons
- Absence of feedback on some operations
11Analysis Scanning and Bagging
- Pros
- Beep indications
- Walk through steps
- Visual Feedback
12Analysis Scanning and Bagging
- Cons
- Poor bag anchors
- No indication of where to place extra bags
- Weighing foods and your hand
13Analysis Scanning and Bagging
- Cons
- Poor bag anchors
- No indication of where to place extra bags
- Weighing foods and your hand
14Analysis Payment and Checkout
- Pros
- Coupons
- Variety of Payment methods
- Combine Payment methods
15Analysis Payment and Checkout
- Cons
- Where is the Receipt?
- Double prompt
- Cant use bills over 20
16Breaking the Machine
- Subject New user Todd
- Fairly easy, no errors encountered
- Subject Veteran user Oscar
- Handles complex errors well
17Usability Analysis
- Questionnaire
- Reasons to use
- Ease of use
- Taken during weekends at busy times
- 45 samples
18Usability Analysis
Experienced Novice
N 37 8
Mean Age 29 30
Mean Items Purchased 6.4 4.7
19Usability Analysis
Experienced
Novice
20Usability Analysis
Experienced
Novice
21Usability Analysis
Novice
Experienced
Used to save time 92 63
Used to save time, feel they saved time 91 50
Did not use to save time but feel they saved anyways 67 33
22Usability Analysis
Experienced
Novice
Instructions Instructions
Clear 97 97 43
Not Clear 0 0 29
Did Not Listen 3 3 29
Opinion of Computer Voice Opinion of Computer Voice Opinion of Computer Voice
Pleasant 36 36 14
Annoying 22 22 29
No Opinion 42 42 57
23Usability Analysis
- User Experience Overall Opinion
Using the following rating scale, please circle
your rating for the following questions 1
Confusing Problematic 2 Some problem or
difficulty 3 Easy, no problem
Rated Experience of
Checking the items 2.73 2.38
Interacting with the touch screen 2.95 2.38
Completing payment 2.84 2.25
Experienced
Novice
24Does the USCAN employ a user centered design??
DESIGN MODEL
USERS MODEL
DESIGNER
USER
SYSTEM
SYSTEM IMAGE
P.O.E.T., p. 190
25Does the USCAN hold to Normans seven principles??
- Seven Principles for Transforming Difficult Tasks
into Simple Ones - Use knowledge in the world and knowledge in the
head. - Simplify the structure of tasks
- Make things visible
- Get the mappings right
- Exploit the power of constraints
- Design for error
- When all else fails, standardize
26U-Scan vs. Cashier
- U-Scan
- Privacy
- Feel in control
- Go at your own pace
- Item list with prices
- Saves time
- Cost effective
- Cashier
- Comfort
- Bagging handled for you (no squished bread)
- Price checks
- Quick error fixes
27Recommendations
- User interface
- Group buttons by function
28Recommendations
- User interface
- Add an animation for processing
29Recommendations
- Scanning and Bagging
- Anchor the bag holder
- Large sign to show where to put overflow bags
30Recommendations
- Payment
- Receipt should be moved closer to the monitor
- Get rid of the double prompt
31Conclusion
- Overall rating 9/10
- Special thanks to manager man
- Josh had a traumatic employee incident
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