# Incident Drill: 'Model X Dün Hallucinate'liyor' — Root-Cause Matrix

> Source: https://sukruyusufkaya.com/learn/fine-tuning-cookbook/ftc-incident-drill-root-cause
> Updated: 2026-08-14T01:07:17.440Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XVI — Production Operations
**TLDR:** Production'da en korkulan cümle: 'Model garbage döndürüyor'. Cookbook'un sistematik root-cause matrix'i: model version değişimi, base model update (HF Hub'da retrain), API provider deprecation, dataset poisoning, prompt injection, sampling temp config drift. Incident response playbook, blameless postmortem template.