SPI Calculator
Append ?slug=<project-slug> to the URL to view the Schedule Performance Index for any tracked Brickplot project. Example: /tools/spi-calculator?slug=provident-park-square.
SPI = actual construction % ÷ planned construction %. Bands: On track ≥ 0.95 · Slipping 0.80–0.95 · Stalled < 0.80.