BrainTrust Investment Lab › Band 4 — Managing the ETL Environment
Band 4 — Managing the ETL Environment · book p.490 · grain: one station per walk sheet
Point at any number and this station answers two questions completely: where did it come from, and what breaks if it changes. Impact analysis is a query here, not a meeting.
No walk sheets yet — this station begins when the ladder reaches it. Nothing is walked ahead of the lowest incomplete rung.
The contract — what each step must produce
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