To test how well your CAD system implements STEP AP242 PMI, open one of the CAD models, export an AP242 file with PMI and process it with the STEP File Analyzer and Viewer. Measuring the PMI Modeling Capability in CAD Systems: Report 3 - Fully-Toleranced Test Case Verification ( Slides) - compares test case specification for PMI to CAD models.Measuring the PMI Modeling Capability in CAD Systems: Report 2 - Combined Test Case Validation ( Slides) - compares CAD models to STEP, JT, and 3D PDF files.Measuring the PMI Modeling Capability in CAD Systems: Report 1 - Combined Test Case Verification ( Slides) - compares test case specifications for PMI to CAD models.Browse the Verification Testing Results for annotations.Guide to the CAD Models and Verification Testing Results.Testing Implementations of Geometric Dimensioning and Tolerancing in CAD Software The results may identify issues relevant to your use cases for downstream automated-consumption of PMI representation or human-interpretation of PMI presentation. PMI representation and presentation are evaluated by many verification characteristics and validation issues.

The results are based on the test case specifications, CAD modeling methods, versions of CAD software, and comparison methodologies. The verification and validation results measure PMI implementation capabilities in CAD software and derivative STEP, JT, and 3D PDF files. Visualizing Model-Based Product Definitions in Augmented Reality.

3D model of the assembly generated by the STEP File Analyzer and Viewer.Download the SolidWorks and Siemens NX models.The parts and assembly were modeled in Dassault Systemes SolidWorks and Siemens NX 1953.

Those FTC test cases were remodeled to be smaller, have simpler PMI, include fasteners to join the parts, and to be more easily manufactured. The models are based on FTC-07 (box), FTC-08 (lid), and FTC-09 (plate) from above. This dataset is based on the project Design, Manufacturing, and Inspection Data for a Box Assembly. The STC can be downloaded as CAD models generated in Dassault Systèmes CATIA, Siemens NX, and Autodesk Inventor. The STC remove some of the more complicated and less commonly used PMI, including all datum targets. Some of the FTC have been modified to create Simplified Test Cases (STC). Some of the PMI defined in a test case might not have been modeled in a CAD system as semantic and/or graphical PMI. Inventor 2018, Inventor 2019, Inventor 2021ĬAD models indicated by * above were verified as part of the testing project and documented in the Test Results below. SolidWorks 2012 * (CTC), SolidWorks 2015 * (FTC), SolidWorks MBD 2018 CTC 02 and 04 fit together in an assemblyĭownload FTC and CTC CAD Models CAD Software ( NIST Disclaimer)

The CTC are not intended to be fully toleranced.

Download the CTC Definitions including STEP AP203 files of model geometry only and explanations of all PMI.

FTC 07, 08, 09, and 10 fit together in an assembly.

Download the FTC Definitions including STEP AP203 files of model geometry only and explanations of all PMI.

The MTC are modified versions of some of the FTC where the geometry and PMI is different. The STC are modified versions of the FTC that remove some of the more complicated and less commonly used PMI, including all datum targets. The test cases are intended to be valid presentations of GD&T defined in the ASME Y14 tolerancing standards, some of which may not be commonly used. Simpler GD&T strategies could have been used. The FTC and CTC are not intended to represent best practice in how to apply GD&T (geometric dimensioning and tolerancing) to a part. The FTC and CTC were part of the original testing project described in the link to the left for the MBE PMI Validation and Conformance Testing Project.

Representative STEP AP242 and AP203 files for each FTC and CTC, many with graphical and semantic PMI.

Browse the PMI annotations in the test cases.

These files can be used to create your own CAD models of the test cases. The definition files contain PDFs of each test case drawing, STEP AP203 files of only the test case geometry, and an explanation of the GD&T.

Native CAD Models for the four type of test cases described below.

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