CRM ROI Decay Index™ Methodology — Axis Intelligence Research original (CC BY 4.0). Cross-referencing Nucleus Research CRM ROI case study series (2011: n=unspecified; 2014: published benchmark; 2023: re-analysis of 63 case studies) with IDC enterprise CRM penetration estimates for corresponding years. Decay slope: −$0.97 per dollar per 10 percentage-point penetration increase (linear approximation across 3 data points). 2028 AI-augmented projection based on Salesforce internal Agentforce deployment results: $100M annualized cost savings, 84% self-resolution rate, 3M+ conversations handled (Fortune, April 2026). This series has not been assembled in this form by any prior publication. · axis-intelligence.com