What is a key aspect of maintainability in product quality?

Repairability at low cost is a key aspect of maintainability in product quality because it directly impacts how easily and affordably a product can be fixed when it breaks down or requires servicing. Maintainability refers to the ease with which repairs can be made, and when a product is designed for low-cost repairs, it enhances customer satisfaction and reduces the total cost of ownership. If a product can be easily repaired without expensive parts or complicated processes, it is more likely to be maintained properly, leading to longer product life and more reliable performance.

While high functionality, easy usability, and efficient design contribute to the overall quality and performance of a product, they do not specifically address the repair aspects that are crucial for maintainability. Functionality might ensure that a product performs its intended task well, usability focuses on how easily a user can interact with the product, and efficient design emphasizes streamlined processes and materials. However, it is the affordability and ease of repairs that make a significant difference in maintainability.