What does user centred design emphasize throughout the design process?

User-centered design emphasizes user involvement throughout the design process to ensure that the final product meets the real needs, preferences, and behaviors of the intended users. This approach prioritizes understanding the user's context, gathering feedback, and continuously iterating on design solutions based on user insights. By actively involving users, designers can identify pain points, preferences, and usability challenges that might not be apparent through other methods. This collaborative engagement results in more effective, functional, and user-friendly designs, ultimately leading to a better user experience.

The other options, while relevant in certain contexts, do not capture the essence of user-centered design. Cost efficiency focuses on minimizing expenses, technical feasibility assesses whether a solution is technically possible, and aesthetic appeal pertains to the visual aspects of design. None of these aspects inherently prioritize user engagement in the same way that user involvement does.