Quality may refer to: Concepts. Quality (business), the non-inferiority or superiority of something. Quality (philosophy), an attribute or a property. Quality (physics), in response theory. Energy quality, used in various science disciplines. Logical quality, philosophical categorization of statements. Service quality, comparison of expectations with performance in a service. Vapor quality, in thermodynamics, the ratio of mass of vapor to that of vapor and liquid. Data quality, refers to the condition of a set of values of qualitative or quantitative variables. Practices.
https://en.wikipedia.org/wiki/Quality