Glossary · definition
OOT (Out of Trend)
A result that is within specification but does not follow the expected pattern of previous results, prompting investigation before it becomes out of specification.
See also:OOS (Out of Specification)
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Articles on OOT
Correlated inputs in uncertainty evaluation
Root-sum-of-squares assumes independence. When two inputs move together — the same reference used twice, for example — the combination must include a correlation term.
Deviations and CAPA for environmental control failures
An excursion, a failed calibration or a mapping failure is a deviation. Classify it, investigate root cause proportionately, and close it with an action that prevents recurrence.