1. Design and Prototyping, Part 2

2. Objectives for today
Prototyping exercises
Using prototypes in testing

3. Review of LoFi Prototypes
Quick and cheap to make, easy to change
Use early in the process, iterate often
“To get a good idea, get lots of ideas”
Examples
Screen sketches
‘Post-it’ notes, note cards
storyboards

4. Need a “toolkit” for making LoFi prototypes
Construction paper
Note cards
Post-it notes
Scissors
Glue, tape
Lots of paper copies of standard GUI elements: text fields, buttons, check boxes, radio buttons, labels, etc.

5. Prototyping Exercise #1
Sketch an interface for the following device
An automated teller machine
That also sells postage stamps
“Sells” rolls of coins
And converts Euros, Canadian Dollars, British Pounds, and Mexican Pesos into US Dollars

6. Prototyping Exercise #2
In groups that I will “assign”
Review the ATM prototypes
Pick a starting point for a second (revised) prototype
Draw a second prototype as a group

7. Questions
How much difference was their between the individual designs?
Did you think some were better than others? Why?

8. Prototyping Exercise #3
Consider the following tasks
Getting the balance in your checking account which has account # pin # 2187
Evaluate how well your prototype supports that task
Redesign your prototype as necessary

9. Prototyping Exercise #3
Consider the following tasks
“Buy” a roll of quarters using money from your savings account # pin # 2187
Evaluate how well your prototype supports that task
Redesign your prototype as necessary

10. Prototyping Exercise #3
Consider the following tasks
Buying a book of stamps ($9.80) using cash.
Evaluate how well your prototype supports that task
Redesign your prototype as necessary

11. Questions How much did the task focus help?
Did considering a task make you change your design significantly?

12. Next chapter from our DVD