ENVENTIVE® 3D&T
3D Tolerance Analysis Software
Turn your CAD models into 3D variational models. Rapidly validate GD&T to ensure reliable fit for assembly and product performance of forces, moments, gaps, motions, and much more.
Built for use by mechanical design engineers rather than full-time variational analysts, 3D&T calculates component stack ups faster and with more confidence than any available tolerance analysis tool — including spreadsheets, 2D software, and other 3D software.
With 3D&T, designers accelerate their GD&T decision making to cut engineering change orders, avoid costly production disruptions, and lower warranty claims.

IMPORTANT SOFTWARE UPDATE
Enventive 3D&T is currently under development and in alpha testing. Beta testing is scheduled to begin in early 2025. For more information we invite you to Contact Us.
WHY 3D&T FOR TOLERANCING DECISIONS?
With 3D&T mechanical designers complete stack up analyses in 3D faster and with more confidence versus any other available tolerance analysis tool – whether the tool is a spreadsheet, 2D analyzer, or other 3D tolerance analysis software. Designers can more rapidly make GD&T decisions that cut engineering change orders, avoid costly production disruptions, and lower warranty claims. Paybacks can be within months and total to millions of dollars.
3D&T accelerates mechanical design workflows by enabling users to directly open and then analyze 3D CAD models for validation of GD&T decisions. This ensures reliable product assembly and functionality, such as forces, gaps, or kinematic motions.

KEY 3D&T CAPABILITIES
- Opens CAD models – Directly opens 3D CAD files, speeding up validation of GD&T decisions as designers are completing their detailed CAD models.
- Applies PMI – Imports Product Manufacturing Information (PMI) annotations within a 3D CAD model as constraints for use within tolerance analysis calculations, greatly reducing manual inputs by designers.
- Rapid analysis – Completes calculations within seconds for worst-case stackups, statistical RSS failure rates, Monte Carlo simulations, tolerance-in-motion studies, multiple stack analyses, and criticality scores of contributing parameters.
- Functional analysis – Unlike any other available 3D tolerance analysis software, 3D&T simulates failure rates for both assembly fit and product functionality, such as forces, moments, gaps, and kinematic motions. Users can quickly create mathematical expressions to model and analyze a wide range of functionality.
- Standard GD&T – Support of standard GD&T syntax within models facilitates decision making, including for datum selections and GD&T values.
- Intuitive user interface – 3D&T’s easy-to-use interface and 3D visualizations quickly put analysis into the hands of the engineers who are completing detailed design work, unlike other 3D tools that typically require full-time, variational analyst specialists and extensive training.
3D&T WORK FLOW
To be competitive there is a need to commit to a design and then launch tooling as soon as possible. This means that you need confidence that GD&T decisions will meet product requirements for both assembly fit and functional performance at a competitive cost. You need to decide whether tolerances should be tighter or looser. You should select datums that can limit costly manufacturing measurements.
With 3D&T, you quickly gain confidence in those decisions by:
- Opening your native 3D CAD assembly file in 3D&T. Everything is in place, including the assembly tree.
- Rapidly setting up your tolerance analyses. Select datums, pick advanced joint functions to assess, such as forces and kinematics. Write equations to model a wide range of product functionality of interest, such as thermal expansions, deflections, or electric conductivity.
- Running single or multiple stack up analyses within seconds to predict failure rates of product requirements. Run calculations using either worst case, RSS, or Monte Carlo.
- Evaluating results. Review reports showing predicted failure rates and ranking of design parameter contributors to failures. If needed, make GD&T changes and rerun stack up analyses to validate decisions.
KEY BENEFITS
3D&T avoids poor GD&T specifications by rapidly and intuitively analyzing the impact of decisions on meeting product requirements for fit, and function. By validating GD&T with 3D&T, users can cut the costs of:
- Engineering Change Orders (ECNs) and Engineering Change Notices (ECNs)
- Tooling delays
- Excessive inspections
- Scrap
- Rework
- Shipment delays
- Product failures, warranties, and recalls
- Time-to-market delays
COMBINING 2D CONCEPT AND 3D&T
Enventive’s Concept software for 2D tolerance analysis goes hand in hand with 3D tolerance analysis in 3D&T. Together, Concept and 3D&T offer an unmatched solution for design optimization of mechanical variation throughout a product’s lifecycle.
Concept excels in what-if analysis during early design stages, while 3D&T offers rapid validation of GD&T during mid-to-late stages of detailed CAD modeling product development activities.
Both tools can be valuable for support of production decisions related to accepting or rejecting components that have become out of tolerance, either during fabrication or as received from suppliers.
Further reading on our tolerance analysis software
Learn about our other products: Enventive Concept and Enventive 360.
Read our tolerance analysis case studies.