phase containment
📖 ISTQB Glossary
Official ISTQB Definition
The policy of removing defects in the same phase of the software development lifecycle in which they were introduced.
3 Ways to Think About It
The Quick Take
Finding and fixing defects in the same phase where they were introduced.
Look Closer
Catching requirements errors during requirements, design errors during design.
The Bottom Line
Preventing defects from escaping to later phases where they're costlier to fix.
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