User-centered design is a structured product development methodology. Usability means a product is easy to learn and use. To determine if the product is easy to use, we need feedback from users. There are a number of techniques that are available, including usability testing.
What is usability testing?
What are you looking for in a usability test?
How does usability testing fit into user-centered design?
What role do ethics play in user-centered design and successful user requirements collection?
The basic question is, who are the users of our product. Interviews and profiling can help us understand our users. Personas are fictional individuals who represent a group of users. Personas describe the users and what the users wish to do.
How would you gather information about a group to create a persona?
Consider the users of an ATM and create 2 personas representing these two groups.