Connect Score v1.0.1 Sensitivity Analysis
Each alternative scheme is compared to the published base (25 Avail / 35 Afford / 40 Adopt). Pass criteria: Spearman rank correlation >= 0.95 AND <= 10% of parishes shift bands.
Top-level weight schemes
| Scheme | Spearman | Band shifts | Mean Δ score | Status |
|---|---|---|---|---|
| equal | 0.991 | 17 / 64 | 1.62 | ATTENTION |
| bead_aligned | 0.980 | 30 / 64 | 3.16 | ATTENTION |
| adoption_only | 0.782 | 34 / 64 | 5.30 | ATTENTION |
| avail_low | 0.994 | 9 / 64 | 0.85 | ATTENTION |
| avail_high | 0.994 | 13 / 64 | 0.85 | ATTENTION |
| afford_low | 0.993 | 7 / 64 | 0.80 | ATTENTION |
| afford_high | 0.992 | 11 / 64 | 0.80 | ATTENTION |
Internal Affordability split sensitivity
Base internal split is 60% structural / 40% Lifeline. Alternatives:
| Split | Spearman | Band shifts | Mean Δ score | Status |
|---|---|---|---|---|
| 70_30 | 0.979 | 7 / 64 | 0.86 | ATTENTION |
| 50_50 | 0.974 | 15 / 64 | 0.86 | ATTENTION |
| 40_60 | 0.902 | 27 / 64 | 1.72 | ATTENTION |