Module 5.1Train, then verify
Fine tuning is worthwhile only when you can test the win and the risk.
Prerequisites
- Comfort with earlier modules in this track
- Ability to explain trade-offs and risks without jargon
Outcomes
- Explain train, then verify in your own words and apply it to a realistic scenario.
- Fine tuning is worthwhile only when you can test the win and the risk.
- Check the assumption "Training data is safe" and explain what changes if it is false.
- Check the assumption "Evaluation includes regressions" and explain what changes if it is false.
Practice
- Solve a complex scenario with explicit assumptions and constraints
- Write one mitigation plan and one fallback plan
Artefact and failure modes
- A concise design or governance brief that can be reviewed by a team
- Memorisation. A tuned model can regurgitate training data. Test for it.
- Behaviour drift. A change that improves one task can silently worsen another.