Added Requirements

+ REQ-004 User can schedule a weekly usage summary email

Removed Requirements

- REQ-003 User can export the current chart as a CSV file

Modified Requirements

~ REQ-002

Before:
User can filter usage charts by date range

After:
User can filter usage charts by date range and by team

Added Metrics

+ 25% of accounts schedule at least one summary email

Removed Metrics

- p95 dashboard load time stays under 2 seconds

Added Risks

+ Scheduled emails could be flagged as spam by strict mail filters
