A short, regular report is better than a thick annual one. These are measures a board might see each quarter. Choose only those that fit your business and that you can measure honestly.
Checks done on time
Percentage of due checks completed and Time to close
How long failed checks and stay openRepeat findings
The same failure at the same place, more than onceLab results
Failed and marginal results, with the trendIncidents and complaints
Illness, and reportsAudit results
External findings, repeat findings, statusPeople
Training coverage and supervisor coverRecall readiness
Last : time taken and what was missed