Quipu CFO

Probabilistic AI. Deterministic Problem. Welcome to this edition of QuipuCFO. This week: what happens when AI meets arithmetic in Excel, why the errors are invisible, and the architectural principle that prevents them. The second article connects this to the broader question of why 40% of agentic AI projects will fail by 2027, drawing on a framework I recently published in FP&A Trends. Every Final-Year Number Was Wrong SumProduct, an Excel modeling consultancy, tested Excel’s new COPILOT...

Token pricing drops. Your bill keeps rising anyway. Introduction This newsletter helps CFOs think better about AI decisions. Each edition tests frameworks from the CFO AI Playbook against real evidence and delivers one concrete action. This edition deals with the total cost of ownership for AI. What happened at Microsoft and Uber laid bare some unexpected movements in pricing impacting costs and usage of agentic AI. Most finance leaders know AI is getting cheaper per token. Fewer know their...

QuipuCFO Newsletter The 32-Point Gap: Why Half of CFOs Think They've Adopted AI — But Haven't Welcome to QuipuCFO This newsletter explores how finance leaders can implement AI strategically: separating what works from what doesn't. Each edition examines real cases, surfaces patterns from research, and offers one concrete action you can take this week. I'm developing The CFO AI Playbook — a complete implementation methodology covering the full CFO decision journey: from strategy and process...