A sufficiency floor is the minimum cohort size below which a method returns a tier or declines to rate, instead of a precise-looking figure. It is part of the method and is published.
Small samples produce wide uncertainty and unstable estimates, and a method that hides this behind a tight-looking band misleads its users. The floor sets the line in advance. Above it, the figure is reported with its band. Below it, the user receives a coarser tier or a not-rated result.
Publishing the floor makes the method auditable. A reader can see whether a figure met the minimum and can compare two methods on how they treat thin data.
A sufficiency floor is not a quality score for the underlying matter. It is a statement about the amount of comparable evidence available to the method.
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