Comparison audit

1. A method to conduct a risk-limiting audit where individual ballots are randomly selected and compared to the voting system’s Cast Vote Record (CVR) for each ballot.

Source: Orange County Registrar of Voters, 2018 Risk Limiting Audit Pilot Project Report, https://www.ocvote.com/election-library/docs/2018%20Risk%20Limiting%20Audit%20Pilot%20Project%20Report.pdf

2. An audit that evaluates the compliance with laws, procedures, or standards. E.g., evaluating the security of ballot storage or the conduct of officials on election day.

Source: Pilot Implementation Study of Risk-Limiting Audit Methods in the State of Rhode Island, RLA Working Group, https://www.brennancenter.org/sites/default/files/2019-09/Report-RI-Design-FINAL-WEB4.pdf