The Index measures what a company has placed on the public record about its use of AI, within the evidence window, against a published rubric. It does not measure business performance, product quality, safety, customer outcomes, or the adequacy of internal controls. A low score on any question means that, in the public sources listed below, reviewed through the cut-off date, disclosure sufficient to satisfy the published criterion was not located. The company may maintain relevant practices or controls that are not publicly disclosed.