Final answer:
Product quality consists of level and consistency, where consistency ensures that every unit of the product maintains the expected quality level. Physical quantities and thorough testing are important for quality assurance.
Step-by-step explanation:
Product quality has two dimensions: level and consistency. The level of quality refers to the performance of a product, including characteristics such as durability, reliability, and the features provided. Consistency, on the other hand, refers to the degree to which a product can deliver the same level of quality over multiple units or over time. This aspect is crucial because consistent quality ensures that customers' expectations are met with every product they purchase, which is essential for maintaining customer satisfaction and brand loyalty.
When evaluating product quality, engineers focus on both the attributes of the product and the adequacy of testing prototypes. Accurate measurements of relevant physical quantities and ensuring that products meet certain standards and accepted reference values are part of maintaining a high level of quality. Businesses may also consider factors such as location and physical aspects advertised (like an 'unbreakable bottle' or 'nonstick surface') that differentiate their products in the market.