Methods for Determining a Limit of a Tolerance Interval, Method for Evaluating a Production Process and Corresponding Calculation Device

Disclosed is a method for determining a limit, comprising:providing a plurality of sample values, wherein the sample values define a sample value distribution, the sample values being values of a technical parameter related to a sample, wherein the sample items are parts of drug delivery devices, wherein the sample items are of the same construction, and wherein the technical parameter is limited by at least one technical limit value,depending on the technical parameter and/or the sample values, choosing a probability distribution function,using the technical limit value to determine a cutoff value for the probability distribution function,specifying a probability content for the tolerance interval, andproviding the limit of the tolerance interval for the technical parameter based on a transformed probability content, wherein said transformed probability content is based on the cutoff value and based on the specified probability content.