Physical AI changes after deployment. Hardware is serviced, software is released, operating domains expand, and incidents create new information. The Index measures whether that changing history can be followed by another party without relying on a founder's memory.
It does not estimate expected loss, certify a system, determine legal compliance, or guarantee a quote. It organizes evidence so operators, brokers, underwriters, and risk partners can ask better questions.
0AbsentNo usable evidence
1InformalKnown by people, not reliably recorded
2PartialSome records, with material gaps
3DocumentedRepeatable records with ownership
4Source-linkedRecords trace back to primary evidence
5ContinuousEvidence stays current as the system changes