Because parts and parameters are reused across multiple tolerance stack-ups, a single change can ripple through the entire design without warning.In Excel, when you update a tolerance specification, it only changes locally in that one sheet. If the same parameter is used in other stack-ups, those won’t update automatically — leaving your calculations out of sync and increasing the risk of errors. On top of that, there’s no built-in traceability, so you won’t see how your change affects your colleagues’ work on the same assembly.

‍With RD8, every parameter is connected.
When you update a tolerance, RD8 shows you the potential impact before applying it — across your own stack-ups and your colleagues’. That way, changes are controlled, synchronized, and transparent.

In Excel, teamwork on tolerance stack-ups is frustrating. Only one engineer can realistically work in the sheet at a time, and a single parameter change can accidentally break a colleague’s work without warning. That’s why collaboration is one of the hardest parts of tolerance analysis.

‍Best practice is to use a dedicated tool like RD8.
With RD8, several engineers can work on related tolerance stack-ups simultaneously. Every parameter update instantly shows its impact — both on your own calculations and your colleagues’. If another tolerance stack starts failing due to your change, you can review it together before publishing. This way, the team stays synchronized, and failures are caught early.

With RD8, there’s no upper limit.
‍Unlike Excel, where calculations and file handling restrict collaboration, RD8 runs all calculations — including heavy methods like Monte Carlo simulations — on the server side. This means your whole engineering team can work together on the same tolerance project without slowing down.You can always see your colleagues’ drafts, shared parameters, and get a live overview of the status of every tolerance stack-up in the project. Collaboration is seamless, scalable, and built for real engineering teams.