Free practice · matching · medium
Practice
Assign nonoverlapping response-time bands
Match each response time to its complete, nonoverlapping group.
Population contract
Every filter must be explicit enough to reproduce
- Region
- Northeast
- Status
- Completed under one approved definition
- Window
- >= Aug 1 and < Sep 1, 2026
- Measure
- Sum completed-order revenue in USD
Closed-open time boundaries prevent overlap at midnight, while a filter waterfall keeps denominator changes visible.