Blank-Page Reconstructions — 12 Drills + Key
For each drill, close the source, recreate the full map, then add one changed-fact branch.
Prompts
- Chapter operating spine
- Six V's
- Analytics horizon
- ETL vs ELT
- Lake vs swamp
- Services layers
- ML selector
- Source filter
- Model evidence split
- Deployment loop
- Governance ring
- Tool selection
Reconstruction key
1. Operating spine
Business need → source choice → ingest + Metadata → DQ/align → hypothesis/model → train/evaluate → communicate → deploy/monitor → iteration.
2. Six V's
Big Data center; Volume/amount, Velocity/speed, Variety/forms, Viscosity/integration difficulty, Volatility/change/useful life, Veracity/trust.
3. Analytics horizon
Descriptive = what/why happened → Predictive = what likely → Prescriptive = what action should influence outcome.
4. ETL vs ELT
ETL: Extract → Transform/Integrate → Load. ELT: Extract → Load/Ingest → Transform/Integrate for use.
5. Lake vs swamp
Source → managed ingest → Metadata/provenance → DQ/profile → relationships/keys → governed access. Remove context/control → swamp.
6. Services layers
Batch=complete history; Speed=current/low latency; Serving=merged/exposed view. Add completeness-latency-complexity trade-off.
7. ML selector
Labeled target → supervised; no labels + pattern discovery → unsupervised; goal/reward feedback → reinforcement.
8. Source filter
Business relevance → origin/meaning → grain/timing → consistency/reliability → privacy/bias → feasibility/value → ingest.
9. Model evidence split
History → train/fit → validate/select/tune → test/generalize → deploy; cross-validation rotates held-out folds.
10. Deployment loop
Useful + feasible → deploy → monitor value/performance → refine → new question/source → retrain/reevaluate.
11. Governance ring
Sourcing, sharing, Metadata, enrichment, access, security/privacy, DQ, visualization standards around the Data Science lifecycle.
12. Tool selection
Parallel structured analytics → MPP; flexible varied-data landing → distributed file; compute near data → in-database; elastic/leased exploration → cloud.
Source: maps synthesize pp. 471–501.