While we are trying to determine the sample size of the inspection lot, we use dynamic modification rules. We have been created a sampling procedure with use of sampling scheme and we assign the sampling procedure to a dynamic modification rule. Also in the characteristic level of a quality plan we have defined the sampling procedure. However, the system does not calculate the sample size in the inspection lot. We see the sample size in the characteristic level, but in the inspection lot (QA03) the system does not calculate the sample size. We see '0' as a result.