External Software Quality

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Capability of a software product to enable the behavior of a system to satisfy stated and implied needs when the system is used under specified conditions. [ ISO/IEC 25000 ]


  • The number of failures found during testing is an external software quality measure related to the number of faults present in the program. The two measures are not necessarily identical since testing may not find all faults, and a fault may give rise to apparently different failures in different circumstances. [ ISO/IEC/IEEE 24765
  • Attributes of the behavior can be verified and/or validated by executing the software product during testing and operation. [ ISO/IEC/IEEE 24765

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