The Spreadsheet & Modelling Workflow
136 copy-paste AI prompts for people who live in spreadsheets — model structure that survives being handed over, formula design, cleaning imported data, error-proofing, and auditing a workbook you did not write.
Key Capabilities & Features:
- •The Workbook Primer: paste what the model is for, who else will open it and how the data arrives once — every prompt after it builds for those people
- •Structure prescribed before formulas, since the majority of unmaintainable spreadsheets are structurally wrong rather than formula-wrong
- •Formulas built in stages with a plain-English explanation of each, so you can maintain them in six months and so can whoever inherits them
- •An auditing section for the workbook you were handed with no explanation, which is how most people meet a serious model
- •An honest prompt for when a spreadsheet has outgrown itself and needs to become a database — before it eats a weekend
- •Works with Excel, Google Sheets or LibreOffice; the Primer asks which, and function differences are named where they matter
- •136 prompts across 8 sections — structure before formulas, formula design, cleaning imported data, error-proofing and more
- •Works with ChatGPT (GPT-5), Claude Opus 5 and Gemini 3.7 Flash — fill the bracket, paste, done
One-time payment • Lifetime access & future updates
What's Inside
8 modules136 promptsEvery module below is included in the single purchase.
- 1
Structure Before Formulas
20 promptsInputs, calculations and outputs separated onto their own sheets, the hardcoded number buried inside a formula, and a layout someone else can follow without you in the room.
- 2
Formula Design
22 promptsBuilding a formula in stages rather than in one line, lookups that fail loudly rather than silently, array and dynamic approaches, and the nested formula nobody can maintain.
- 3
Cleaning Imported Data
20 promptsText that looks like numbers, dates in four formats, trailing spaces and inconsistent categories, deduplication that does not delete the wrong row, and a repeatable clean.
- 4
Error-Proofing
18 promptsValidation that stops bad input at entry, checks that make a broken model obvious, protecting cells without making the sheet unusable, and the error that shows a plausible number.
- 5
Auditing Someone Else's Workbook
20 promptsFinding what a model actually does, tracing a number to its source, the assumption hidden in a formula, and the circular reference nobody mentioned.
- 6
Summarising & Reporting
18 promptsPivots and grouped summaries that answer one question, charts that do not mislead, a summary tab a manager can read in a minute, and reconciling two numbers that should match.
- 7
Automation & When To Stop
12 promptsRepeatable steps, connected queries, and the honest signal that a spreadsheet has outgrown itself and should become a database before it costs you a weekend.
- 8
Handover & Documentation
6 promptsDocumenting a model so it survives you, the assumptions tab, version control without software, and the note explaining why a strange formula is strange.
Test Workflow Execution in Your Browser
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Frequently Bought Together
Technical Specifications
Architecture & System Overview
Almost every unmaintainable spreadsheet is unmaintainable for structural reasons, not because a formula was too clever. Inputs, calculations and results are mixed on one sheet, a rate is typed inside a formula rather than sitting in a cell, and by the time anyone notices there are eleven copies in circulation.
The Spreadsheet & Modelling Workflow is a 136-prompt playbook covering structure before formulas, formula design, cleaning imported data, error-proofing, auditing someone else's workbook, summarising and reporting, automation and when to stop, and handover and documentation.
Start with the Workbook Primer — paste in what the model is for, who else will open it and how the data arrives — and every prompt after it builds for those people rather than for you alone.
Formulas are built in stages with an explanation of each step in plain English. A formula you cannot explain is a formula you cannot maintain, and the nested one-liner that felt satisfying to write is the thing that will defeat you in March.
The error-proofing section concentrates on the failure that matters: not the formula that breaks and shows an error, which you will notice, but the one that quietly returns a plausible wrong number for four months. Check rows, reconciliations and validation exist to make that kind of failure loud.
And there is a prompt whose job is to tell you to stop. Spreadsheets have a size beyond which they become the most expensive possible database, and recognising that before the crash rather than after is worth more than any formula in the toolkit.
Note on tools: this is not affiliated with Microsoft, Google or any spreadsheet vendor. The Primer asks which application you use, and function-name differences are noted where they matter.
Compare with Similar AI Templates
| Specification | ||||
|---|---|---|---|---|
| Customer Rating | 4.75(4) | 4.91(43) | 4.93(45) | 4.91(38) |
| AI Models | GPT-5, Claude Opus 5, Gemini 3.7 Flash | GPT-5, Claude Opus 5, Gemini 3.7 Flash | GPT-5, Claude Opus 5, Gemini 3.7 Flash | GPT-5, Claude Opus 5, Gemini 3.7 Flash |
| Formats Included | PDF Prompt Playbook | PDF Prompt Playbook | PDF Prompt Playbook | PDF Prompt Playbook |
| Lifetime Updates | Yes | Yes | Yes | Yes |
| Creator Rating | Samira Khan (98.8%) | Dr. Lucas Vance (99.2%) | Marcus Sterling (99.3%) | Elena Rostova (99%) |
Community Reviews & Ratings
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Verified User Feedback
Eleven hardcoded numbers in an inherited model
The audit trace found rates typed inside formulas, two of which had not been true since 2023. That workbook was driving our pricing. Genuinely alarming and entirely invisible before.
It told me to stop and use a database
Two hundred thousand rows and four people editing. It said plainly that no amount of formula work fixes that. I had been about to spend a weekend on it.
Staged formulas with explanations
Slower to build, and I can still read my own work three months later. The habit of separating inputs onto their own sheet has done more than any single function I learned.
Not a shortcuts course
There is no keyboard-shortcut list and nothing on macros beyond when to stop. It is about building models that hold up, which was what I needed but is not what I expected.
Frequently Asked Questions
Excel or Google Sheets?
Either, and LibreOffice too. The Primer asks which and function-name and behaviour differences are named where they matter. The structural material — inputs separated from calculations, staged formulas, check rows — is identical across all of them.
Is this affiliated with Microsoft or Google?
No. It is an independent product and names those applications only as tools it works with. It contains no vendor material and no certification content.
Does it overlap the Data & Analytics toolkit?
Only lightly. That one covers SQL, warehouse schemas, metric definitions and pipelines. This one is about workbooks as artefacts — building them, cleaning what lands in them, and auditing them. If your data lives in a database rather than a file, that is the other toolkit.
Will it write my formulas?
It builds them in stages and explains each step, which is slower than handing you a one-liner and is the point — you have to maintain it. It will also tell you when the thing you are trying to do should not be a formula at all.
How is it delivered?
You receive a PDF with all 136 prompts organized into 8 sections, delivered within 24 hours of purchase. No app or account required — copy a prompt, fill in the bracketed variables, and paste it into ChatGPT, Claude, or Gemini.
Can I use this for client work?
Yes. Your purchase includes a single-user commercial and personal license, so you can use every prompt in your own business or for client deliverables without restriction.