${''}■P1 Critical — immediate risk to personnel, facility or product. Persistent; re-notifies every 5 min; reason required to acknowledge.

▲P2 High — definitive quality degradation if uncorrected. Auto-escalates to P1 after 60 min unacknowledged; reason required.

△P3 Medium — approaching limits / sustained sub-optimal. Logged; no stock hold.

◆P4 Low — outside optimum but within limits. Dashboard flag + daily digest; escalates to P3 if sustained >24 h.

INSTANTANEOUS — a single reading crosses a hard limit.

CONTINUOUS — a sustained breach held beyond its configured duration (filters transient door events).

CUMULATIVE — a rolling-window time budget beyond a threshold; the row shows "% of window consumed" and projected breach.

Acknowledge records a response note. Quality hold (P1/P2, managers only) flags affected stock in the WMS.