Final answer:
The question about the quality to build into a product is asked during the product development phase of new-product development. This phase is crucial to ensure that the detailed design aligns with quality standards and market demands.
Step-by-step explanation:
The question "How much quality should we build into the product?" is one that marketers ask during the product development phase of new-product development. This phase involves refining the product's design by testing and evaluating prototypes, as well as focusing on the attributes of the product to ensure it meets quality standards and market needs. The product development stage is critical to the success of the project, as a poor detailed design can ruin a good design concept, and adequate testing of prototypes is essential to evaluate the quality of a design.