Regression testing. Testing of a previously tested program following modification to ensure that defects have not been introduced
or uncovered in unchanged areas of the software, as a result of the changes made. It is performed when the software or its
environment is changed. [ISTQB Glossary]
168
Frederick Brooks,
«The Mythical Man-Month».
169
Re-testing, Confirmation testing. Testing that runs test cases that failed the last time they were run, in order to verify the success
of corrective actions. [ISTQB Glossary]
170
Acceptance Testing. Formal testing with respect to user needs, requirements, and business processes conducted to determine
whether or not a system satisfies the acceptance criteria and to enable the user, customers or other authorized entity to determine
whether or not to accept the system. [ISTQB Glossary]
171
Factory acceptance testing. Acceptance testing conducted at the site at which the product is developed and performed by
employees of the supplier organization, to determine whether or not a component or system satisfies the requirements, normally
including hardware as well as software. [ISTQB Glossary]
172
Operational acceptance testing, Production acceptance testing. Operational testing in the acceptance test phase, typically
performed in a (simulated) operational environment by operations and/or systems administration staff focusing on operational
aspects, e.g. recoverability, resource-behavior, installability and technical compliance. [ISTQB Glossary]
173
Site acceptance testing. Acceptance testing by users/customers at their site, to determine whether or not a component or system
satisfies the user/customer needs and fits within the business processes, normally including hardware as well as software.
[ISTQB Glossary]