Kobzar.
Field notes Sheet N · Scale NTS
Cost engineering · practice

Notes

Working notes on what capital projects cost: estimate classes, contractor pricing, bid evaluation, contingency, schedules. Grounded in the AACE canon and in work on live projects.

N-01

AACE CAPEX estimate classes: what "±30%" actually means

The five classes of 18R-97 for owners: how to read an accuracy range, what class a bank expects, how the classes map onto Russian design stages, and five mistakes that cost money.

Jul 2026

Most of these notes are written in Russian first — the Russian index is here.