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Quality engineering is designed to organize and coordinate the implementation of quality and quality control for products and services across all of a company’s processes and structures, by developing and deploying methods and tools made available to company services in the interests of quality preservation and improvement.

In industry and concepts of scientific management (Taylorism), the term quality reflects the “one best way” to manufacture something. Quality standards apply both to products (industrial, intellectual, services, healthcare, teaching…) and the way they are produced. Within technical quality terms, it describes items free of deficiencies.

Quality control (aka quality inspection) is an operation used to determine, through appropriate means, whether a controlled product (or service, document, source code…) complies with a set of predetermined specifications and requirements. The resulting decision is acceptance, rejection or reworking. Measuring, examining, testing and gauging of a product or service according to certain standards and comparing the results with specified requirements to find out if conformity is reached.

A set of internal guidelines defining how quality policies and targets must be taken into consideration and implemented in order to control and improve various processes used within an organization. A quality management system interacts directly with a company’s continuous improvement and quality performance.

Supplier Quality Assurance (SQA), as a part of Quality Assurance activities, define and implement methodologies for certain aspects of supplier quality performance. Its main goal, in practice, is to ensure the conformity of products in accordance with the customer's requirements and to serve as an interactive relationship between the customer and the supplier.