Replacing a spreadsheet with custom software means keeping the logic your business built up inside it and moving it somewhere that can enforce rules, control who edits what, and record what changed. The spreadsheet is not the problem. Depending on it is.
The tipping point
Three things: stop someone entering a wrong value, stop the wrong person seeing a row, and tell you reliably who changed what and when. Every serious spreadsheet failure comes back to one of those.
| Need | Spreadsheet | Software |
|---|---|---|
| Two people editing at once | Conflicts, or one person waits | Both work, no collision |
| Stopping bad data | Convention and hope | Rejected at entry |
| Who may see what | Whole file, or nothing | Per user, per record |
| What changed and why | Rarely recoverable | Recorded automatically |
| An accidental deletion | Found out later | Reversible |
How the move runs
The hard part of this work is archaeology, not engineering. Years of decisions are encoded in nested formulas, and often the person who wrote them has left.
The parallel step is the one people want to skip and the one that catches everything. Running the new system beside the spreadsheet for a couple of cycles is how you find the rule nobody mentioned, while it is still cheap to fix.
Questions
When more than one person edits it, when a mistake in it costs real money, or when you cannot tell who changed a figure and why. Those three conditions are what spreadsheets genuinely cannot do: enforce rules, control access, and keep a reliable history. Until you hit one of them, a spreadsheet is a perfectly good tool and replacing it is a waste of money.
No — that logic is the most valuable thing in the file and it is the first thing we extract. Years of pricing rules, edge cases and exceptions are usually encoded in the formulas and nowhere else, often by someone who has since left. We read them, write them down in plain language, get you to confirm them, then implement them where they can be tested.
It gets migrated, and the migration is where the surprises live. Real spreadsheets contain dates stored as text, duplicate records that differ by a trailing space, and rows that were never finished. We clean and import it, show you exactly what did not fit, and let you decide on those rather than quietly dropping them.
Yes, and you should be able to. People have legitimate reasons to pull data into a spreadsheet — an ad hoc analysis, something an accountant wants. The goal is not to remove Excel from your life; it is to stop the spreadsheet being the master copy that everything else depends on.
We’ll read the formulas and tell you what it would take — or that you should keep the spreadsheet a while longer.