Tolerance Analysis (Inventor)
Inventor's stack-up analysis tool — combines feature tolerances to predict the variation in critical assembly dimensions.
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Definition
Tolerance Analysis (part of PDMC) lets engineers model a tolerance stack-up directly on the assembly: select contributing dimensions, apply tolerances and statistical distributions, calculate the predicted variation of a measurement of interest using worst-case or Monte Carlo analysis.
Why it matters
Tight-tolerance assemblies need stack-up analysis to predict whether the design will actually fit. Without it, tolerances are set conservatively (expensive) or aggressively (unreliable).
Common pitfalls
- Stack-ups that ignore form/orientation tolerances — predict size variation but miss flatness.
- Hardcoding nominal values instead of linking to Inventor parameters.
- Reporting one-sigma when six-sigma is required for the application.
Inventor Ecosystem Context
This concept is a core structural element of the Inventor drafting and engineering environment developed by Autodesk. Autodesk's Windows-native parametric MCAD — strong on large mechanical assemblies, sheet metal, frame generator, and integration with Autodesk Vault and Revit.
Relevant Inventor FAQs
❓ What's the difference between Inventor and Fusion 360?
Inventor is Windows-only desktop, file-based, deep MCAD with Vault integration. Fusion 360 is cross-platform (Win/Mac), cloud-data, broader scope (CAM, electronics, generative design), simpler assemblies. Inventor for established mechanical engineering teams; Fusion 360 for makers, small teams, integrated CAM workflows.
❓ Can Inventor open SOLIDWORKS files?
Indirectly. Inventor doesn't natively read .sldprt/.sldasm; export from SOLIDWORKS to STEP or Parasolid, then open in Inventor. Features import as static geometry without parametric history.
❓ What's in the Product Design & Manufacturing Collection?
Inventor, AutoCAD, AutoCAD Mechanical, Inventor Nastran (FEA), Inventor Tolerance Analysis, Factory Design Utilities, Inventor CAM, Vault Basic, ReCap Pro, and Fusion 360 (selected modules). Most production Inventor users are on PDMC rather than standalone Inventor.
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Autodesk Inventor 2025 | Basics For Beginners | Step-by-Step
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