A methodology which can be used when a situation exhibits one or more of the following characteristics: A service has never existed before. Customer requirements are not known. The existing service/process performance is not capable of meeting customer requirements.

QA establishes and maintains set requirements for developing or manufacturing reliable products. A quality assurance system is meant to increase customer confidence and a company’s credibility, while also improving work processes and efficiency, and it enables a company to better compete with others.

A methodology which can be used when a situation exhibits one or more of the following characteristics: A service has never existed before. Customer requirements are not known. The existing service/process performance is not capable of meeting customer requirements.

procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer. QC is similar to, but not identical with, quality assurance (QA). While QA refers to the confirmation that specified requirements have been met by a product or service, QC refers to the actual inspection of these elements.

QA is sometimes expressed together with QC as a single expression: quality assurance and control (QA/QC).

Quality improvement (QI) is a systematic, formal approach to the analysis of practice performance and efforts to improve performance.

A variety of approaches—or QI models—exist to help you collect and analyze data and test change. While it’s important to choose a reputable QI model to guide your efforts, it’s more important that you fully commit to using the QI process and good QI practices.