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Development, testing, acceptance and production (DTAP) [1] [2] is a phased approach to software testing and deployment. The four letters in DTAP denote the following common steps: Development: The program or component is developed on a development system. This development environment might have no testing capabilities.
Acceptance testing of an aircraft catapult Six of the primary mirrors of the James Webb Space Telescope being prepared for acceptance testing. In engineering and its various subdisciplines, acceptance testing is a test conducted to determine if the requirements of a specification or contract are met.
Operational testing a jet engine. Operational acceptance testing (OAT) is used to conduct operational readiness (pre-release) of a product, service, or system as part of a quality management system. OAT is a common type of non-functional software testing, used mainly in software development and software maintenance projects. This type of ...
Acceptance testing may be performed as part of the hand-off process between any two phases of development. [citation needed] Tests are frequently grouped into these levels by where they are performed in the software development process, or by the level of specificity of the test. [54] User acceptance testing (UAT) Operational acceptance testing ...
Smoke testing is also done by testers before accepting a build for further testing. Microsoft claims that after code reviews, "smoke testing is the most cost-effective method for identifying and fixing defects in software". [10] One can perform smoke tests either manually or using an automated tool. In the case of automated tools, the process ...
Manufacturing test or production test – to be performed during preparation or assembly of the product in an ongoing manner for purposes of performance verification and quality control. Acceptance test or commissioning test – to be performed at the time of delivery or installation of the product.
Note: Repaired Unit Acceptance Testing performance data is also used to evaluate "in-family" performance. While a UUT may meet all other Acceptance Test pass/fail criteria, results which deviate significantly from other repaired units or from the original Production Unit Acceptance Test data shall require rejection of the UUT.
The software release life cycle is the process of developing, testing, and distributing a software product (e.g., an operating system).It typically consists of several stages, such as pre-alpha, alpha, beta, and release candidate, before the final version, or "gold", is released to the public.