Who this is for
Finance or operations owner whose workbook builder has left.
The person who built the model has gone and nobody dares change a number in case something breaks.
The result
One workbook gets a plain-English map of inputs, steps, hard-coded values, outside links and assumptions. The map predicts the outputs for five changed input sets, and the predictions equal the workbook's recalculated outputs to the stated rounding. What we could not explain is listed, and the workbook is not changed.
What is included
- One workbook of up to 20 sheets with no macros; macros are flagged only
- A map of inputs, calculation steps, hard-coded values, outside links and assumptions
- A formula graph extracted by script, as the map's evidence
- Predictions for 5 changed input sets, 3 of them chosen by you
- A list of what could not be explained
You receive
- The plain-English logic map
- The list of hard-coded values and outside links
- The prediction and recalculation table for five input sets
- The list of unexplained parts
- The extraction script
What is not included
- Changing, fixing or rebuilding the workbook
- Reading macro code beyond flagging it
- Workbooks that pull live outside sources
- Judging whether the model's logic is right for your business
- Personal data
What we need from you first
- What the workbook produces and how many sheets it has
- Whether it has macros or links to other files
- No real records, personal data or credentials in the first enquiry
Never send passwords, keys, customer records or confidential code in the first enquiry. Secure handover is agreed after scoping.
How we check it is done
- For 5 changed input sets, 3 chosen by you and sent only after the map is final, the separate automated reviewer predicts the outputs from the plain-English map alone (not from the script, the formula graph or the workbook), and the predictions are time-stamped before anyone recalculates. You then recalculate the three sets you chose in your own copy and never send us the results first; we recalculate the other two and show them beside our predictions. All five predictions equal the recalculated outputs to the stated rounding. Five sets test the map; they do not prove it.
- Every cell range cited in the map exists in the workbook; a script checks each reference.
- Every hard-coded constant inside a formula is listed with its cell.
- What we could not explain is listed, and the workbook file is byte-identical before and after the work.
You inspect the map, the predictions and the unexplained list, and sign off in writing. Payment follows sign-off.
When we would stop or decline
- The workbook pulls live data from outside sources
- Macros do the main calculation
- More than 20 sheets and you do not want a quoted larger scope
- You want the model's logic changed
Questions
Will you fix the workbook?
No. We explain how it works and list what we could not explain. Fixing is a different job.
How do you know the map is right?
It predicts outputs for five changed input sets, and we compare with the real recalculation.
What about macros?
We flag them and map the rest. If macros do the main calculation, the job does not fit.
Price and terms
£245 · untested offer price. £245 after the agreed checks pass and you sign off. No payment before sign-off.
This is a new service with no published client results. The price is a starting point we have not yet tested with buyers. Nothing is ordered or charged by the enquiry. The full specification is on the Synthetic Industry catalogue.