Good design is primarily measured by which of the following?

Good design is primarily measured by functionality. Functionality refers to how well the design meets the needs of users in accomplishing their tasks. A functional design enhances the user experience by making products or websites easy to navigate, intuitive, and efficient. While aesthetics, such as how a webpage looks, play an important role in initial user attraction, it is functionality that sustains interest and usability over time.

Effective design must balance both appearance and usability; however, if a design is visually appealing but lacks functionality, it will not serve its intended purpose well, and users may ultimately find it frustrating. Therefore, a design's success is often gauged by how effectively it allows users to achieve their objectives, which underscores the importance of functionality in the assessment of good design.