Portfolio your program's escalation exposure, project by project
Everything else on the site is market-level. You manage a program. Enter each project's base estimate and base month and the DC Build index escalates it to the last complete month; pick a delivery month and a carry basis and it carries it forward — by a realized historical regime you chose, never by a forecast — with the p10–p90 of like-length history as the band. Beside that full carry sits an S-curve figure: only the dollars not yet spent are carried, and only to the midpoint of their spend between construction start and delivery. Projects live in this browser and in the link; nothing is sent anywhere.
loading your projects…
Reading this honestly
The index is an input-price index (2018-01=100), not a turnkey $/MW quote, so the base estimate is yours and the output is a ratio applied to it. The carry bases are measured windows of the same index (long-run, trailing 3-year, current momentum) plus two hindsight-selected episodes (GFC, COVID peak) that carry no grade; the grading harness shows how each rolling basis has held up on every vintage since 2018, and the basis with the best mean error has been the worst contingency. The S-curve column is an assumed, symmetric spend profile, not your cost-loaded schedule: if you hold actuals and a cash-flow forecast, escalating each month's spend is the sharper version of the same idea, and a front- or back-loaded build moves the midpoint. Every number on this page can be re-derived from datacenter.json and the calculator math in the repository.