Resilience management - Measure
Availability
How often a system is working and usable when people need it
What's it for?
Shows whether a service is available when people need to use it.
For example…
The helpdesk portal aims for high availability so staff can raise tickets overnight as well as by day.
A payroll portal available 99.95% of the month can still have brief outages, but far less downtime than a 99% service
Think of it like…
Shop’s opening hours — except even short unexpected closures annoy everyone