Sources of Software Faults
Sources of Software Faults
Requireme
nts
analysis
System
design
Program
design
Program
implementati
on
Unit/
integration
testing
System
testing
Maintenan
ce
Incorrect, missing or unclear requirements
Incorrect or unclear translation
Incorrect or unclear design speci+cation
Incorrect or unclear design speci+cation
Misinterpretation of system design
Misinterpretation of program design
Incorrect documentation
Incorrect syntax or semantics
Incomplete test procedures
New faults introduced when old ones corrected
Incomplete test procedures
Incorrect user documentation
Poor human factors
New faults introduced when old one corrected
Changes in requirements
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