30. The Machine Learning Workflow Step by Step
30.5 Practice, Tip and Close
Why. Lock the five steps before sklearn code arrives.
What. A reusable checklist for every future ML chapter.
How.
Chapter practice
- Pick a fictional problem: “predict milk stockout tomorrow in Mauli Dairy Kothrud.”
- Fill one line for each step: data / features / train / evaluate / predict.
- List two human decisions you will not hand to the model.
- List one workflow mistake you personally might make — and the fix.
Practice task
Draw five boxes on paper. Stick one sticky note per step for the late-delivery story. Photo it for your notes (no need to upload).
Thodkyaat sangaycha tar (quick recap)
- Five steps: data → features → train → evaluate → predict
- India story makes the steps concrete
- Humans still choose problem, fairness and action
- Biggest beginner fails are workflow, not formulas
Samajla ka? Aata pudhe jaauya train-test split — exam paper aadhi baghun answers shikayche nahi.