Regular and planned monitoring and evaluation of various aspects of a project, service, system or device that maximizes the likelihood of meeting the minimum quality standards in the production process. Quality assurance certainly can not guarantee the production of quality products.
Quality assurance involves the implementation of measures in a quality system that achieves the goals of a product, service or activity. Systematic measurement, comparison with standards, inspection of trends and feedback to prevent errors. This can be the difference between quality assurance and quality control, which focuses on the output of trends.
Two principles that quality assurance includes: “Suitable for the purpose” – the product must be suitable for the intended purpose; And “right the first time” – mistakes must be corrected. Quality assurance includes the regulation of the quality of raw materials, alloys, products and components, services related to production and management, as well as the production and inspection of processes. It is the duty of the engineer to be efficient in the first place, while the duty of quality assurance is efficiency at all times.