Reliability, security & resilience · Core
Scalability
Also called: scale capability
ELI5
The system can grow without breaking or becoming uneconomic.
Used in conversation
“Scalability includes people and support, not only servers.”
Definition
The ability of a system or organisation to handle growth without unacceptable loss of performance or economics.
Here “Scalability” means: The ability of a system or organisation to handle growth without unacceptable loss of performance or economics.
Pitch context
You will see “Scalability” 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.
- National Institute of Standards and Technology — Computer Security Resource Center GlossaryDirect source · primary · checked 2026-08-16
- Scrum Guides — The Scrum Guide — official current versionSupporting source family · primary · checked 2026-08-16