Experiments, testing & rollout · Core
Primary metric
Also called: primary outcome
ELI5
The most important number used to decide the test.
Used in conversation
“Name one primary metric before launch.”
Definition
The main outcome selected in advance to judge an experiment.
Here “Primary metric” means: The main outcome selected in advance to judge an experiment.
Pitch context
You will see “Primary metric” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches experiments, testing & rollout.
Why it matters: It helps a reader interpret experiments, testing & rollout without confusing the measure, decision, role or evidence being discussed.
Sources & evidence · 2
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- Scrum Guides — The Scrum Guide — official current versionSupporting source family · primary · checked 2026-08-16
- National Institute of Standards and Technology — Computer Security Resource Center GlossarySupporting source family · primary · checked 2026-08-16