AI product & model operations · Working
Validation data
Also called: validation set
ELI5
Data used to improve and check the model during development.
Used in conversation
“The validation data is separate from the final test set.”
Definition
Data used during model development to tune choices and estimate performance.
Here “Validation data” means: Data used during model development to tune choices and estimate performance.
Pitch context
You will see “Validation data” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches ai product & model operations.
Why it matters: In ai product & model operations, 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