The company reports a table that contains various KPIs to measure effectiveness.
pg. 9
"Assessing effectiveness
Consistent with our approach for the first reporting period, the following processes remain in place to continue to monitor, review and assess the effectiveness of our actions.
Metric 2020 2021 Intended Outcome "
pg. 7
"In 2021 we asked 266 suppliers complete our modern slavery survey (~representing ~30% of our 2021 spend). This is a substantial increase on the number of surveys completed in 2020 as we broadened our survey base to include more of our critical suppliers."