Researching usability

Once you have a functional prototype, the research focus shifts to determining if the product is usable. Here are some methods you can use at this stage:

• Usability test: Qualitative usability testing is the most crucial method to test for usability. It helps you discover what works and what needs to be changed or even uncover problems you'd never have thought of.
• Card sorting: This technique is especially helpful in establishing information architecture — website structure, menu labels, content grouping, etc.
• Tree testing: This method helps you to assess your product's information architecture. If you know that users aren't reaching an important page, a tree test can help you determine if the issue lies with the IA or UI.