Skip to content


Three Counties in Florida: Collier, Port St. Lucie, Volusia (2020 Election)

This case study shows the performance of AuditEngine performing ballot image audits when applied to three counties in Florida for the 2020 November Election, Collier County, Volusia County, and St. Lucie County. We show that the accuracy of AuditEngine is greater than 99.99% and when it differs with the voting system and the images are not corrupted, AuditEngine correctly interprets voter intent 93% of the time while the voting system interprets it correctly only 7% of the time. (These numbers are from Collier County audit and are slightly corrected from the video).

See Also:

  • Background Document -- Review this background document to become acquainted with general concepts and operational principles of AuditEngine
  • AuditEngine FAQs -- frequently asked questions about AuditEngine
  • AuditEngine -- primary project page for AuditEngine

Combined Case Study Report -- 2020 Election Ballot Image Audits in Collier County, Volusia County, and St. Lucie County Florida

The Case Study Report <-- click here to open as googledoc
Case Study Report <-- click here for PDF

Cover Letter to Volusia County

Video Part 1: Introduction and Theory of Operation

Part 2: Collier, FL:

Part 3: Port St. Lucie, FL:

Part 4: Volusia, FL: