Why is usability crucial in product design?

Usability is crucial in product design because it directly impacts customer satisfaction. When a product is designed with usability in mind, it ensures that users can easily interact with it, understand its functions, and achieve their desired outcomes without frustration or confusion. A high level of usability leads to a more positive user experience, encouraging repeat usage and fostering brand loyalty. This satisfaction can also translate into positive word-of-mouth and increased sales, as satisfied customers are more likely to recommend the product to others.

In terms of the other options, enhancing aesthetic value may contribute to a product’s appeal but does not guarantee that the product will be user-friendly. Reducing manufacturing costs is important for a product's overall success but often doesn’t directly relate to how easily a consumer can use the product. Creating more complex user interfaces contradicts the principles of usability, which focus on simplicity and ease of use, rather than complexity that may confuse users. Therefore, the best response centers on how usability fosters a better experience for customers, leading to successful product design outcomes.