Notebook 4 is the first integrated validation checkpoint: it audits join completeness and tests whether the core sandy-soil drought signal is detectable.
Business lane: Risk & Opportunity Framing Technical lane: Validation & Signal ReliabilityInterpretation boundary.
This stage does not claim causal proof. It verifies whether the expected signal is measurable and stable enough to justify a full end-to-end real-data run.
- Validation scope
- Join completeness and first signal checks
- Signal family
- Sandy soil vs moisture stress vs yield anomalies
- Delivery output
- Evidence package for go/no-go on full analysis run
4
Validation: Coverage and Signal
Check multi-table completeness and estimate sand-moisture relationships with district-level yield anomalies.
Coverage matrixCorrelation testDistrict-level diagnostics
Release note: this notebook is currently in refinement, but it already establishes whether the main hypothesis remains coherent at district level.
Core notebook sequence completed: 67%
Key output
This notebook provides the first consolidated evidence that the project signal is both measurable and geographically coherent.
| Checkpoint | Outcome | Portfolio implication |
|---|---|---|
| Join completeness audit | Core joins remain largely intact | Downstream metrics can be compared consistently |
| First signal pass | Expected direction is visible in multiple districts | Worth proceeding to full real-data assembly |
| Geographic coherence | Signal clusters are not randomly scattered | Supports practical communication to stakeholders |
Open notebook source