What is the term for the degree or grade of excellence of a product or service?

The term that describes the degree or grade of excellence of a product or service is quality. Quality encompasses various attributes, including durability, performance, reliability, and conformance to specifications or standards. In industries, maintaining high quality is crucial as it impacts customer satisfaction, brand reputation, and overall business success.

Six Sigma refers to a set of techniques and tools aimed at process improvement, focusing on reducing defects and variability in manufacturing and business processes but does not specifically define excellence in product or service quality. Lean methodology emphasizes efficiency by eliminating waste in processes and improving overall workflow, which can enhance quality indirectly but is not a direct measure of excellence. The International Standard Organization (ISO) 9000 series outlines quality management principles and provides a framework for organizations to ensure consistent quality in their products and services, but it does not itself define quality. Thus, the most direct answer concerning the degree of excellence of a product or service is quality.