Glossary Terms Archive

What Is a Covariate? Definition, Examples, and ANCOVA Use

A covariate is a variable that is measured but not directly controlled in an experiment, correlates with the outcome being studied, and is not itself affected by the treatment. It matters because leaving a covariate unaccounted for can inflate error and distort...

Cost of Quality (COQ)

For many years, the concept of COQ is well-known. Joseph Juran, a quality expert, and renowned author wrote about the concept of quality cost in his 1951 book Quality Control Handbook. He defined COQ to include both tangible and intangible costs. Armand Feigenbaum...

Cost of Non-Conformance

The cost of non-conformance represents one of the most significant yet often overlooked expenses in the business world. Organisations across the globe struggle with quality failures that result in substantial financial losses, damaged reputations, and decreased...

Cost of Conformance: Definition, Formula, and COQ Model

Cost of Conformance (COC) is the money an organization spends to build quality in from the start, before a defect ever happens. It’s made up of two categories: prevention costs (training, quality planning, process design) and appraisal costs (inspections,...

Corrective and Preventive Action (CAPA)

CAPA, or Corrective And Preventive Action, is a methodological strategy for mitigating risks and improving processes, identifying the sources of actual or potential issues and their root causes, planning solutions for those problems, and documenting the solution so...