1. Event Logs also known as Audit Logs Required in 1990 VSS and all subsequent Rarely used Potentially very valuable  Routine audits for continuous quality improvement  Post election forensics NOT the same as "audit trail" as in VVPAT

2. Event Log Use Miami-Dade County, iVotronic Routine post-election auditing County Audit and Management Department Discoveries  1 in 10 machines not plugged in on election day  Misreported serial numbers Led to correction of 2 software/firmware bugs

3. Potential Event Log Use Were there enough voting machines Were there too many machines When were the polls opened When was the last vote cast How long was the line at closing time

4. Barriers to Event Log Use David Wagner has studied this for California California's response was a best practices document.

5. Recommendations We should recommend that the EAC promulgate best practices for log retention and use VVSG 2.0 should set a standard export format for logs, something as simple as CSV? VVSG 2.0 should require public documentation of what is logged, where and how.