Knowledge Review Interval
The maximum time an article can go without an accountable owner confirming that its answer, screenshots, links, and scope are still current.
Overdue review rate = articles past next-review date / articles in scope × 100; review interval = next-review date − last verified dateA knowledge review interval is the planned distance between evidence-based checks of a knowledge article. It is not the article's age and it is not the last-edited timestamp: an old answer can remain correct, while a page edited yesterday can still contain the wrong policy. A real review ends with an owner recording what they checked, whether the article remains valid, and when it must be checked again.
The useful unit is risk, not one universal calendar. Review high-volume troubleshooting, safety, billing, authentication, and AI-grounding content more often than stable background material. A practical operating model assigns each article a risk tier, a named owner, a last-verified date, and a next-review date. The companion control is overdue review rate: articles past their next-review date divided by all articles in scope.
What it hides: a green verification badge can certify that somebody clicked a button, not that anybody retested the answer. Calendar reviews also miss event-driven decay after releases, policy changes, incidents, or owner departures. Pair the interval with triggers that immediately reopen affected content and with outcome signals such as failed searches, repeat contacts, escalations, and agent feedback.