Reliability, security & resilience · Core

Availability

Also called: service availability

ELI5

How often the service is working when needed.

Used in conversation

“Availability is measured at the customer-facing service boundary.”

Definition

The proportion of time a service is usable under a stated definition.

Here “Availability” means: The proportion of time a service is usable under a stated definition.

Pitch context

You will see “Availability” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches reliability, security & resilience.

Why it matters: In reliability, security & resilience, the scope can change what data may be used, who may access it and which controls are required.

Sources & evidence · 2

Direct term-level sources and supporting source families.