Yes. Applying a constant plan that does not take into account the history of batches is useless. The MIL-STD-105E switching rules and MIL-STD-1235C switching rules are an integral part of the sampling scheme.

The problem lies in correctly using the tables. We suggest reading the standards carefully, and especially the legend and footnotes at the bottom of the particular table.
One common mistake, when arrows are present in the tables, is not adjusting the sample size according to the arrow. This is just one example.
Using our calculators is a safer alternative to the error-prone usage of the printed standards.

Absolutely! Although the military standard itself was phased out in 1989, it's civilian counterparts, ANSI Z1.4 or ISO 2859 (which are essentially the same) still exist. In practice these sampling plans are widely used by many industries.

Our calculators have been validated by our own extensive testing. Internally our calculators use tables which are identical to the ones specified by the standards. We have launched our calculators in the year 2000 (see http://www.sqconline.com/about-sqc-online). In the past 26 years the calculators have been used and scrutinized by thousands of users (including government agencies and many medical and pharmaceutical companies) who often double-check our results against the tables.