  The City and County of San Francisco, CA, has used Instant Runoff Voting
(IRV) for some elections since 2004. This report describes the first ever
process pilot of Risk Limiting Audits for IRV, for the San Francisco District
Attorney's race in November, 2019. We found that the vote-by-mail outcome could
be efficiently audited to well under the 0.05 risk limit given a sample of only
200 ballots. All the software we developed for the pilot is open source.
