DPI is a derived index, not a federation. Every number on this site can be traced back to a primary scoring source. This page is the contract: what we ingest, how we adjust, when we publish, and where we stay silent.
Six upstream feeds. Each is either polled or webhook-fed. We never re-host source data without attribution; every ride links back to its origin record.
Every ride moves through five stages. Median end-to-end latency from score post to published index: ~8 min (p50). Stages are idempotent — re-running a stage on an already-processed row is safe.
A rider’s DPI is a percentile-rank composite of their adjusted scores in the rolling 4-month window, weighted by level. We do not reward volume — five exceptional rides beats fifty median ones.
For every panel ride, each judge’s score is compared to the panel mean. The rolling delta — Average Bias from Line (ABL) — is folded back into single-judge rides to correct for systematic generosity or severity. ABL publishes only after 25 panel observations; below that, we surface a provisional value with the confidence band.
Published cycles will live at /cycle. The route is reserved; the first cycle publishes in v0.5.