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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Operational acceptance testing</span></span>

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<p><b>Operational acceptance testing</b> (<b>OAT</b>) is used to conduct operational readiness (pre-release) of a product, service, or system as part of a <a href="Quality_management_system" title="Quality management system">quality management system</a>. OAT is a common type of non-functional <a href="Software_testing" title="Software testing">software testing</a>, used mainly in <a href="Software_development" title="Software development">software development</a> and <a href="Software_maintenance" title="Software maintenance">software maintenance</a> 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 <b>operational readiness testing</b> (<b>ORT</b>) or <b>operations readiness and assurance testing</b> (<b>OR&A</b>). <a href="Functional_testing" title="Functional testing">Functional testing</a> within OAT is limited to those tests which are required to verify the <i>non-functional</i> aspects of the system.

</p><p>OAT elaborates upon and compartmentalises operational aspects of acceptance testing.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>

</p><p>According to the International Software Testing Qualifications Board (ISTQB), OAT may include checking the <a href="Backup" title="Backup">backup</a>/restore facilities, IT <a href="IT_disaster_recovery" title="IT disaster recovery">disaster recovery</a> procedures, maintenance tasks and periodic check of security vulnerabilities.,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and whitepapers on ISO 29119 and Operational Acceptance by Anthony Woods,<sup id="cite_ref-ISO_29119_OAT_3-0" class="reference"><a href="#cite_note-ISO_29119_OAT-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> and ISO 25000 and Operational Acceptance Testing by Dirk Dach et al., OAT generally includes:<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

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<ul><li>Component Testing</li>

<li>Failover (Within the same data centre)</li></ul>

<dl><dd><ul><li>Component fail-over</li>

<li>Network fail-over</li></ul></dd></dl>

<ul><li>Functional Stability</li></ul>

<dl><dd><ul><li>Accessibility</li>

<li>Conversion</li>

<li>Stability</li>

<li>Usability</li></ul></dd></dl>

<ul><li>IT Service Management (Supportability)</li>

<li>Monitoring and Alerts (to ensure proper alerts are configured in the system if something goes wrong)</li>

<li>Portability</li></ul>

<dl><dd><ul><li>Compatibility</li>

<li>Interoperability</li>

<li>Installation and Backout</li>

<li>Localization</li></ul></dd></dl>

<ul><li>Recovery (across data centres)</li></ul>

<dl><dd><ul><li>Application/system recovery</li>

<li>Data recovery</li></ul></dd></dl>

<ul><li>Reliability</li></ul>

<dl><dd><ul><li>Backup and Restoration (Recovery)</li>

<li>Disaster Recovery</li>

<li>Maintainability</li>

<li>Performance, Stress and Volume,</li>

<li>Procedures (Operability) and Supporting Documentation (Supportability)</li>

<li>Security and Penetration</li></ul></dd></dl>

<p>During OAT changes may be made to environmental parameters which the application uses to run smoothly. For example, with <a href="Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a> applications with a mixed or hybrid architecture, this may include: <a href="Windows_service" title="Windows service">Windows services</a>, <a href="Configuration_file" title="Configuration file">configuration files</a>, <a href="Web_services" class="mw-redirect" title="Web services">web services</a>, <a href="XML" title="XML">XML</a> files, <a href="COM%2B" class="mw-redirect" title="COM+">COM+</a> components, web services, <a href="Internet_Information_Services" title="Internet Information Services">IIS</a>, stored procedures in databases, etc. Typically OAT should occur after each main phase of the development life cycle: design, build, and <a href="Functional_testing" title="Functional testing">functional testing</a>. In sequential projects it is often viewed as a <i>final</i> 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.

</p><p>An approach used in OAT may follow these steps:

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<ul><li>Design the system,</li>

<li>Assess the design,</li>

<li>Build the system,</li>

<li>Confirm if built to design,</li>

<li>Evaluate the system addresses business functional requirements,</li>

<li>Assess the system for compliance with non-functional requirements,</li>

<li>Deploy the system,</li>

<li>Assess operability and supportability of the system.</li></ul>

<p>For running the OAT <a href="Test_case" title="Test case">test cases</a>, the tester normally has exclusive access to the system or environment. This means that a single tester would be executing the test cases at a single point of time. For OAT the exact <b>Operational Readiness</b> quality gates are defined: both entry and exit gates. The primary emphasis of OAT should be on the operational stability, portability and reliability of the system.

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://atos.net/wp-content/uploads/2017/01/atos-operational-acceptance-testing-whitepaper.pdf">"atos-operational-acceptance-testing-whitepaper.pdf"</a> <span class="cs1-format">(PDF)</span>.</cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">ISTQB <a rel="nofollow" class="external free" href="http://istqbexamcertification.com/what-is-acceptance-testing/">http://istqbexamcertification.com/what-is-acceptance-testing/</a></span>

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<li id="cite_note-ISO_29119_OAT-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-ISO_29119_OAT_3-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFAnthony_Woods2015" class="citation document cs1">Anthony Woods (2015). "Operational Acceptance - an application of the ISO 29119 Software Testing standard" (Document). Capgemini and Sogeti. pp. <span class="nowrap">1–</span>12.</cite></span>

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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">White Paper: Operational Acceptance Testing, Business Continuity Assurance. December 2012 Dirk Dach, Dr Kai-Uwe Gawlik, Mark Mevert</span>

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