Which "Quality of Product" dimension refers to whether the product does what you want it to do?

The dimension of "Quality of Product" that pertains to whether the product does what you want it to do is performance. Performance reflects the ability of a product to meet the functional requirements of the user. It is a measure of how well the product performs its intended tasks, which can include aspects like speed, efficiency, and accuracy. When evaluating a product, its performance answers the crucial question of whether it delivers the desired outcomes and meets the user's expectations.

In contrast, serviceability relates to how easy it is to maintain and repair the product; conformance measures how well the product meets specified standards or requirements; and durability assesses the lifespan of the product under normal usage conditions. While these other dimensions of quality are important for overall product assessment, they do not specifically address the core function of meeting user needs as performance does.