For decades, mining engineers have relied on Excel spreadsheets for circuit design calculations. They work, but they come with significant risks that the industry is starting to recognise.

The Problem with Spreadsheets

Version control: Which version of the SAG sizing spreadsheet is correct? The one from the 2019 project, or the one Dave modified last year? Spreadsheet proliferation is a real problem in engineering teams. Validation: When was the last time anyone checked the formulas in your Bond Work Index spreadsheet? One misplaced cell reference can propagate errors through an entire circuit design — and nobody notices until commissioning. Collaboration: Emailing spreadsheets back and forth creates confusion. Who has the latest version? Were John's changes to the ore properties incorporated?

What SaaS Tools Offer

Modern engineering SaaS platforms address these issues:

- Always up to date: One version of the truth, always current

- Validated calculations: Models checked against real plant data

- Audit trail: Every calculation is saved and traceable

- Speed: What takes hours in Excel takes minutes

- Benchmarking: Compare your designs against thousands of operating mills

The Validation Advantage

The most important difference isn't speed — it's validation. Our platform validates every calculation against a database of 2,500+ operating mills. If your SAG mill design falls outside the range of proven designs, you'll know immediately.

No spreadsheet offers this level of confidence.

Making the Switch

The transition doesn't have to be all-or-nothing. Most teams start by using SaaS tools for preliminary sizing and benchmarking, then gradually adopt them for detailed design as confidence grows.

Try our tools free — the basic calculators don't even require an account.