Hannah Berg
Dimensional Engineer
2026-08-01
Replaced a fragile spreadsheet we had used for a decade. Monte Carlo runs are fast and the reports look professional.
Python Tolerance Stack-Up Studio
Worst-case, RSS and Monte Carlo stack-ups with publication-ready plots.
4.9 (67 reviews)8,740 downloadsv1.9.3
Python 3.10+ Windows / Linux / macOS
Overview
A desktop application for dimensional engineers. Define contributors, distributions and sensitivities, then run worst-case, RSS and Monte Carlo analyses side by side. Results export to PDF reports and CSV so they can drop straight into a design review pack.
Key features
- Worst-case, RSS and Monte Carlo in one model
- Contributor sensitivity ranking
- Non-normal distributions and shifted means
- Capability metrics (Cp, Cpk, PPM)
- Batch scenario runner via CLI
- PDF and CSV report export
Screenshots
Video tutorial
Reviews & ratings
5.0
67 ratings
Ahmed Zaki
Quality Engineer
2026-06-17
Sensitivity ranking makes design reviews far shorter — you immediately see which contributor to attack.
Write a review
Reviews will open once the catalogue is synced to the database.
Frequently asked questions
Version history
- v1.9.32026-08-20
Faster Monte Carlo sampler, PDF template refresh.
- v1.8.02026-04-04
CLI batch runner and CSV export.
- v1.5.02025-11-21
Added capability metrics.
Related tools
Python Engineering ApplicationsFreePython Drawing Data Extractor
Pull dimensions and title-block data from legacy PDF drawings.
4.314,980v0.9.5
Excel VBA AutomationFreeExcel BOM & Cost Engine
Turn raw BOM exports into costed, revision-aware workbooks.
4.640,310v2.6.0
Excel VBA Automation$79VBA Engineering Calculation Pack
60 verified calculation sheets with unit handling and audit trail.
4.726,440v5.1.0