This book constitutes the proceedings of the 26th IFIP WG 5.4 International TRIZ and Artificial Intelligence Conference, TRAI 2026, held in Hammamet, Tunisia, during October 21–23, 2026.

The 56 full papers  included in this book were carefully reviewed and selected from 81 submissions. They were focused on topical section as below.

Part I: TRIZ Foundations and Contradiction Analysis; AI, LLMs and Agentic Systems for Inventive Design.

Part II: Supply Chains, Logistics and Sustainability; Business, Manufacturing, Production and Engineering Applications; Business, Healthcare and Intelligent Applications.