Operational acceptance testing

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 testing focuses on the operational readiness of the system to be supported, and/or to become part of the production environment. Hence, it is also known as operational readiness testing (ORT) or operations readiness and assurance testing (OR&A). Functional testing within OAT is limited to those tests which are required to verify the non-functional aspects of the system.

According to the International Software Testing Qualifications Board (ISTQB), OAT may include checking the backup/restore facilities, IT disaster recovery procedures, maintenance tasks and periodic check of security vulnerabilities., and whitepapers on ISO 29119 and Operational Acceptance by Anthony Woods, and ISO 25000 and Operational Acceptance Testing by Dirk Dach et al., OAT generally includes:

During OAT changes may be made to environmental parameters which the application uses to run smoothly. For example, with Microsoft Windows applications with a mixed or hybrid architecture, this may include: Windows services, configuration files, web services, XML files, COM+ components, web services, IIS, stored procedures in databases, etc. Typically OAT should occur after each main phase of the development life cycle: design, build, and functional testing. In sequential projects it is often viewed as a final verification before a system is released; where in agile and iterative projects, a more frequent execution of OAT occurs providing stakeholders with assurance of continued stability of the system and its operating environment.

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