... and other tools and resourcesneeded for such work. 7. 7 References1. British Standards Institution. 1989. BS 71 72 , British Standard Guide to Assessment of Position, Size and Departure from Nominal ... better standards, better tools for specifying allowable part variation, less disagreement between suppliers and customers regarding acceptability of parts, and better and cheaper products. 7. 5 .2 International ... shown in Figs. 8-1, 8 -2, and 8-3. Statistical tolerance requirements canbe indicated in the ST frame in one of the three ways defined in sections 8 .2. 1, 8 .2. 2, and 8 .2. 3.8 .2. 1 Using Process Capability...