| dw_actions | Recommended actions and audit log |
| dw_estimate | Window-level item difficulty estimates |
| dw_impact | Score and pass-rate impact of drifted items |
| dw_monitor | Sequential drift monitoring |
| dw_simulate | Simulate a continuously administered item bank with known drift |
| dw_tune | Tune the alarm threshold for a bank-wide false-alarm target |
| dw_twopoint | Two-point drift check (the conventional baseline) |