Sitemaps display the relationship between various pages and content of a website, demonstrating the way that the website is organized, how it can be navigated, and how it is labeled.
Interviews are used to dig deeper into an individual experience or viewpoint. They produce rich qualitative information that you couldn’t get in a survey, and allow you to go deeper into emotions and experiences than you’d be able to while merely observing someone’s behavior.
Taxonomy is a fancy word for organizing by type. It’s something we do all the time and it is evident all around us. How do you organize your kitchen? Do you throw all the food, dishes and utensils together into a single cupboard? Or do you put dishes in one cupboard, utensils and flatware in another, and food somewhere else? That’s a taxonomy.
Maslow’s Hierarchy of Needs in a design context helps us focus the core tasks of an applicantion on meeting user needs and business goals.
One of the first things a user does when they arrive on a new site is to check out the top-level navigation for clues about what the main categories are and where they might want to go first. This quick look around helps form that mental map.