1. 
   Operational acceptance testing
   Operational acceptance testing (OAT) is used to conduct performance testing of a product, service or system as part of a quality management system. OAT is a common type of software testing, used mainly in software support and software maintenance projects. This type of testing focuses on the operat...
   Found op http://en.wikipedia.org/wiki/Operational_acceptance_testing
   
   
2. 
   operational profile testing
   Statistical testing using a model of system operations (short duration tasks) and their probability of typical use. [Musa]...
   Found op http://www.imbus.de/glossar/
   
   
3. 
   operational testing
   (testing) A US DoD term for testing performed by the end-user on software in its normal operating environment. (1997-01-07)
   Found op http://foldoc.org/operational+testing
   
   
4. 
   operational testing
   Testing conducted to evaluate a system or component in its operational environment. [IEEE]
   Found op http://www.testingstandards.co.uk/living_glossary.htm
   
   
5. 
   operational testing
   Testing conducted to evaluate a component or system in its operational environment. [IEEE 610]...
   Found op http://www.imbus.de/glossar/
   
   

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