Optionalalphaα for pooling decisions (default 0.25).
OptionalconfidenceConfidence level for the shelf-life bound (default 0.95). One-sided with one limit, two-sided with both.
OptionallslLower / upper specification limits (at least one).
OptionalmaxSearch horizon for the shelf life (default 4 × the latest time).
Optionalusl
Stability Study (Minitab Stat › Regression › Stability Study): response versus time with a batch factor. Model selection as in Minitab / ICH Q1E: the batch × time interaction is dropped when p >
alphaPool(default 0.25), then the batch term; the shelf life is the earliest time at which the confidence bound of the fitted mean crosses a specification limit (per batch when batch terms remain, overall = minimum).