GD&T Software
GD&T evaluation, tolerance analysis and reporting tools that turn drawings into defensible conformance decisions - independent guidance on the right platform for your business.
How it works
GD&T software falls into two categories. Evaluation platforms (PC-DMIS, Calypso, PolyWorks|Inspector, Geomagic Control X, Metrolog, MODUS) drive measurement devices and evaluate features against ISO 1101 / ASME Y14.5 tolerances. Tolerance analysis platforms (Sigmetrix CETOL, 3DCS, Teamcenter VSA) simulate how tolerances stack up in assemblies before parts are made.
Typical accuracy
Software choice does not change measurement accuracy directly - but it dramatically affects whether GD&T is evaluated correctly per ISO 1101 / ASME Y14.5 (unified vs zone-based, MMC/LMC bonus, datum simulator behaviour).
Applications
- First-article inspection reports (AS9102, PPAP, VDA)
- GD&T verification per ISO 1101 or ASME Y14.5
- Full-scan colour deviation with GD&T callouts overlaid
- Tolerance stack-up analysis on new products
- Statistical tolerance analysis - Monte Carlo simulation
- Central reporting and PLM integration
Strengths
- • Standards-compliant GD&T evaluation removes ambiguity
- • Automated ballooned reports save hours per part
- • Tolerance analysis prevents downstream conformance issues
- • Central data pipeline into SPC, MES and PLM
Limitations
- • Licences and training are a real running cost
- • Standards behaviour differs subtly between packages - matters in disputes
- • Migrating between platforms is non-trivial
- • Poor drawings still produce poor reports
Evaluation vs analysis - and why you need both
Evaluation software tells you whether a physical part meets its GD&T. Analysis software tells you whether the design's tolerances can be met at all, and how variation will accumulate in the assembly. Mature quality organisations use both, and treat them as complementary rather than alternatives.
Standards behaviour matters in disputes
Different packages interpret ambiguous drawings differently - notably in position tolerance with MMC, datum simulator behaviour and unified vs zone-based composite tolerances. When a customer report disagrees with a supplier report, the software configuration is usually the reason. We help teams standardise settings so results are defensible.
Buying considerations
- ISO 1101 vs ASME Y14.5 support and rigour
- MMC / LMC bonus tolerance handling and datum simulator behaviour
- CAD import formats and PMI (product manufacturing information) support
- Balloon and report templates matched to your customers' formats
- Multi-device support - one platform across CMM, scanner and portable
FAQs
Which GD&T package should we standardise on?+
It depends on your existing metrology hardware, your customer base and your engineering CAD platform. We're vendor-neutral and will recommend based on your actual workload.
Do we need tolerance analysis software?+
For any new product with more than ~10 stacked features or critical assembly gaps, yes. It typically pays back in a single avoided design change.