A defect is a non-conformance to a requirement.A failure is a defect that reaches the customer.
Defect vs FailureDefects are unexpected results that differ from behavioral, functional and non-functional requirements. Requirements can include concrete things such what happens when you press a button on website. They can also include intangible properties such as the taste of a inflight meal.
Failures are defects that reach a customer. For example, a meal that tastes bad that isn't caught by testing or quality control to reach a customer who will have a bad experience as a result.
|Definition||A mistake that falls short of your plans for a product or service.||A defect that reaches a customer.|
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