What "good enough" calibration actually means
Calibration is not a magic button. It is the discipline of making sure the estimating system thinks in your company's cost structure before it starts drafting scope at speed.
The minimum viable calibration stack
Loaded labor rates, crew mix, apprentice ratios, travel rules, overtime assumptions, and prevailing wage handling.
Historical hours per unit by trade, assembly, building type, site condition, ceiling height, trench condition, access, and equipment needs.
Quote history, preferred suppliers, substitutions, freight, tax, escalation, and quote-required categories.
Human approval rules for high-dollar items, alternates, exclusions, low-confidence evidence, and replaced supplier/sub quote values.
What not to do
- Do not treat national cost data as bid-ready pricing without local and company-specific review.
- Do not train on completed jobs unless you can separate missed scope from production-rate variance.
- Do not let old spreadsheet assemblies become permanent truth without a review trail.
How Vernier should improve over time
Every reviewed bid can teach company memory: which assemblies were accepted, which quotes replaced estimates, which scope was excluded, and which line items overran after award. That turns calibration into a loop rather than a one-time setup screen.
Related: Audit before AI | Vernier calibration | State of estimating | Request beta access