User-centered design puts the needs of end users at the center of the design process. Instead of starting with technology or business goals, it starts with research. Who will use this? What do they need? What problems do they have? The approach was formalized by Don Norman and others in the 1980s and later codified in international standards like ISO 9241-210.

The process is iterative. Designers research users, create prototypes, test them with real people, and refine based on what they learn. The cycle repeats until the design meets user needs. This sounds obvious, but many products are built around internal assumptions. A team might spend months building a feature no one asked for. User-centered design reduces that risk by keeping actual users in the loop.

Core principles

• Research users before designing.
• Involve users in testing and feedback.
• Iterate based on evidence, not opinion.
• Consider the whole experience, not just the screen.

User-centered design is not the same as designing by committee. Users describe problems, not solutions. The design team still makes the creative decisions. The point is to ground those decisions in real needs.