Availability Management in ITSM: 99.9% Uptime—Still Down?

Описание: Availability Management in ITSM is more than an uptime percentage. A service can look “green” while users still cannot log in, pay, or complete critical work.

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In this practical CGTech lesson, learn how to define usable availability, turn business needs into measurable targets, calculate availability, distinguish reliability from maintainability, identify single points of failure, and understand where monitoring, high availability, disaster recovery, RTO, and RPO fit.

Pause for the mini-challenges, then comment: Which hidden dependency would you protect first?

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Sources and further reading

ITIL Version 5 and user experience: https://www.itil.com/Itil-News-and-An...

ISO/IEC 20000-10 concepts and vocabulary: https://www.iso.org/standard/74316.html

AWS availability definitions and calculations: https://docs.aws.amazon.com/wellarchi...

Azure high availability and disaster recovery: https://learn.microsoft.com/en-us/azu...

Google SRE service-level objectives: https://sre.google/sre-book/service-l...

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