A test matrix is simply a spreadsheet that suggests test and captures test results by laying them out in the form of a table. A test matrix can be used for a number of purposes:to record a consistent set of tests; to document a desired level of test coverage based on an intersection of two criteria and, when filled out, to be used as evidence that the desired amount of testing has been done; as a quick visual indication of how much testing has been done on those criteria; to help to identify and refine the specific environments in which a defect occurs; when it is completely filled out, as a checklist to assure that some exhaustive task has been completed.
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