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Methodology · BHI-1.0

The versioned rules behind every BHI number.

Every BHI figure surfaced in SENSE&VALUE — dashboards, alerts, valuation packs, signed reports — is computed by the procedure in this document. Download the PDF, or verify its SHA-256 directly in your browser.

Download BHI-1.0-methodology.pdf65.0 KB · published 2026-07-01
Section 3 · Subsystem weights

Weight vector w

Fixed under BHI-1.0. Missing subsystems redistribute proportionally.

Structural
30%
MEP
25%
Envelope
15%
Energy
15%
Safety
10%
Finish
5%
BHI = Σ wᵢ · sᵢ
  • Structural — Life-safety and irreversible damage.
  • MEP — Chillers, pumps, switchgear — OPEX and downtime.
  • Envelope — Facade, roof, waterproofing.
  • Energy — Directly tied to NOI; real-time measurable.
  • Safety — Fire, smoke, water, egress.
  • Finish — Cosmetic; tracked for tenant satisfaction.
Section 5 · Bands

Score bands

Excellent
90–100
Good
75–89
Watch
60–74
Critical
0–59
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Section 4 · Subsystem score sᵢ

How each channel becomes a 0–100 score

sᶜ(xₜ) = 100 · exp(−k · d(xₜ))
d(xₜ) = max(0, xₜ − hi, lo − xₜ) / (L − hi)

For each channel, readings inside the target band [lo, hi]score 100. Excursions decay exponentially toward 0 at the hard limit L. v1 uses k = 2.30 (10× decay at the hard limit). Readings older than the channel's stale-threshold produce s = nulland trigger reweighting, always disclosed in the report.