Geometric.Startup.2.0.0.14918.Win64 Best-in-Class Tolerance Stack up Analysis Software. Geometric Stackup provides a simple solution to perform tolerance stack up analysis on complex assemblies with unprecedented ease, speed and accuracy – reducing tolerance stack up calculation time from hours to minutes. Why Geometric Stackup? - Integrated CAD Platform - Multi CAD File Support - Automated Dimension Capture - Interactive Dimension Loop - Continuous Selection