availability
🔒 CT-SEC
🛡️ CT-STE
📕 CTAL-TTA
Official ISTQB Definition
The degree to which a component or system is operational and accessible when required for use.
3 Ways to Think About It
The Quick Take
The degree to which a system is operational when needed.
Look Closer
Is the system up and working when users try to use it?
The Bottom Line
Uptime - the percentage of time the system is accessible.
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