Numbers over time
The dashboards' status bars tell you where things stand today. The METRICS tabs add the missing dimension - time - so you can see whether the backlog is shrinking, whether sites are progressing, and how busy the team has been week by week.
There are two places to look. The project's METRICS tab charts the project; My Dashboard → METRICS charts your own submissions and reviews. Both draw on the same cases, so the numbers reconcile with the TOTAL CASES bars elsewhere.