Which "Quality of Product" dimension assesses if the product consistently performs as it is supposed to over time?

The dimension that assesses whether a product consistently performs as it is supposed to over time is reliability. Reliability refers to the ability of a product to consistently perform its intended function without failure over a specified period. This means that a reliable product will not only meet performance standards initially but will do so repeatedly under normal usage conditions. It is a critical aspect of quality assurance, as customers expect products to operate effectively without frequent breakdowns.

In contrast, the other dimensions provide insights into different aspects of quality. Performance relates to how well a product performs its intended function, while conformance addresses how well a product meets specified standards or requirements. Durability, on the other hand, focuses on how long a product lasts before it deteriorates or fails, but does not necessarily guarantee consistent performance over time. Therefore, reliability is the key dimension concerning consistent product performance throughout its lifecycle.