Quality Assurance

ISO 8402:1995 defines quality assurance as 'all the planned and systematic activities implemented within the quality system and demonstrated as needed to provide adequate confidence that an entity will fulfil requirements for quality'. ISO 9000:2005 defines quality assurance as 'The part of quality management focused on providing confidence that quality requirements will be fulfilled'.

Quality Assurance (or QA) covers all activities from design, development, production, installation, servicing and documentation. It introduced the sayings 'fit for purpose' and 'do it right the first time'. It includes the regulation of the quality of raw materials, assemblies, products and components; services related to production; and management, production, and inspection processes.

One of the most widely used paradigms for QA management is the PDCA (Plan-Do-Check-Act) approach, also known as the Shewhart cycle. The main goal of QA is to ensure that the product fulfills or exceeds customer expectations

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