assumption-registry-builder

Build a structured assumption register for Excel models with sensitivity ranks.

Updated Jun 17, 2026
One-click install
npx skills add https://github.com/adriaanmostert1976-lab/adriaan-toolkits --skill assumption-registry-builder
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: assumption-registry-builder
Source: https://github.com/adriaanmostert1976-lab/adriaan-toolkits/tree/main/source/modelling-toolkit/assumption-registry-builder
Command: npx skills add https://github.com/adriaanmostert1976-lab/adriaan-toolkits --skill assumption-registry-builder

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill addresses the challenge of documenting and maintaining a structured assumption register for Excel models, ensuring transparency, auditability, and ease of handover.

Core Features & Use Cases

  • Assumption Documentation: Creates a structured register for material assumptions with ID, category, base value, source, rationale, and more.
  • Sensitivity Analysis: Computes sensitivity rank from tornado impacts for comprehensive analysis.
  • Monitoring and Sign-off: Tracks ownership, monitoring flags, and sign-off for ongoing maintenance.
  • Use Case: Ideal for financial models, where assumptions need to be tracked, reviewed, and signed off before major decisions.

Quick Start

Execute the assumption-registry-builder skill to build the assumption register for your Excel model.

Frequently Asked Questions about assumption-registry-builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build an assumption register for an Excel financial model?

Build an assumption register by extracting model inputs, scenario outputs, and tornado impact data to populate a structured table tracking ID, category, base value, source, rationale, ownership, and sign-off. This Skill automates that construction and maintenance process.

What is an assumption register and why do I need sensitivity analysis for it?

An assumption register documents material model assumptions for transparency and auditability. Sensitivity analysis computes ranks from tornado impacts to prioritize which assumptions drive model variability and require closer monitoring and sign-off.

Can I track ownership and sign-off status for assumptions in Excel?

Yes, you can track ownership and sign-off status. The register includes monitoring flags and verification fields to ensure ongoing maintenance and accountability for material assumptions before major financial decisions.

What data do I need to generate a sensitivity rank for my assumption register?

You need tornado impact data, model inputs, and scenario outputs. The Skill computes sensitivity ranks from this tornado impact data to quantify the relative importance of each assumption in the register.

Does this assumption register builder work without external dependencies?

Yes, it works without external dependencies. The Skill operates using internal scripts to construct the register, requiring only your Excel model data including inputs, scenario outputs, and tornado impacts.