Causes Of Software Defects – ISTQB

Causes Of Software Defects

Error

Humans make a mistake in the code. Development of a document specification.

Defect

A problem caused by an error.

Fault

A failure of the system or component caused by a defect.

Failure

Failures don’t only happen due to defects, but also environmental conditions, hardware problems, etc.

All defects start with a human error (for example a typo, misunderstanding, lack of planning, capability, etc.) The tester’s job is to expose the defect by causing a failure before the software gets to production.

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