The eight-point ordinal scale used to weigh observed events
| Level | Observed related effects |
|---|---|
| 1 | Potentially distracting stimulus |
| 2 | Non-case-related stimulus noticed by staff, not by sterile team |
| 3 | Sterile team member momentarily distracted |
| 4 | Sterile team member engages in distraction |
| 5 | Sterile team member’s primary task interrupted |
| 6 | Sterile team momentarily distracted |
| 7 | Sterile team engage in secondary tasks |
| 8 | Sterile team’s work interrupted—operation flow disrupted |