The operational exposure that refrigeration-door activity creates on door-equipped assets — openings per period, average open duration, the share of monitored time open, the longest open event, and the count of prolonged-open events. It separates expected operational activity, such as an approved restocking window, from anomalous prolonged opening that lets warm air into the case. Doorless assets are excluded, not reported as zero, and a closed signal is never read as proof that a gasket is sealing.
The operational exposure created by refrigeration-door activity on door-equipped assets — how often doors open, how long they stay open, the share of monitored time they are open, the longest single open event, and how many prolonged-open events occur. It is an operational-behavior signal about how a door-equipped asset is used, distinct from the asset's temperature compliance, and it exists to explain and pre-empt the excursions that door activity causes.
Per door-equipped asset, the metric aggregates openings per period, average open duration, percentage of monitored time open, longest open event, and the count of prolonged-open events over the evaluated period.
Doorless assets are excluded from the metric entirely, not represented as zero — an open multideck case with no door has no door exposure to measure, and reporting it as "0 minutes open" would falsely imply a sealed door.
The metric distinguishes expected operational activity from anomalous prolonged opening — a burst of openings during an approved restocking window is normal; a single door left open past its configured ceiling is not. Thresholds vary by asset type, operating context, and approved restocking windows.
A binary closed signal must not be interpreted as proof that a door gasket is sealing correctly — the metric reports door state and open behavior, not seal integrity. Implausibly long open events are treated as possible sensor faults and excluded from operational alarms until validated.
| Range | Classification | Interpretation |
|---|---|---|
| Open behavior within the asset's configured operating profile | Expected — normal activity | Openings and open durations sit inside the asset's expected profile for its context and approved restocking windows; no action. |
| Elevated open time or repeated prolonged-open events | Elevated exposure — monitor | The asset is open more than its profile expects; correlate with temperature movement and check restocking discipline before it drives an excursion. |
| A single open event past the configured ceiling, or persistent excessive open time | Prolonged open — act | A door is open long enough to let warm air load the case; notify the store and watch for a temperature excursion developing. |
Reference behavior only. The prolonged-open ceiling, the elevated-exposure band, and the definition of an approved restocking window are configured per asset type and operating context — a back-of-house walk-in door and a customer-facing reach-in behave differently, and neither ceiling is a universal catalog constant.
There is no universal door-open target — an acceptable open profile depends on the asset type, its traffic, and its approved restocking windows. The target is the asset's own configured profile; the metric surfaces anomalous prolonged opening against that profile, not against a fixed number of openings.
The table below shows how moving Refrigeration Door Exposure impacts each customer value driver the product is designed to improve — the metric page explains the mechanism; the product pages express the magnitude.
| Value driver | Impact strength | How Refrigeration Door Exposure moves this lever |
|---|---|---|
| Energy savings | Direct, primary | Every minute a refrigeration door is open past its expected profile lets warm, humid air into the case, and the asset spends energy pulling the temperature back down. Surfacing prolonged-open events and excessive open time is the most direct no-capex lever on the avoidable refrigeration load a door-equipped asset carries. The magnitude is expected (pending validation). |
| Product loss prevention | Direct | Prolonged door opening is a leading cause of temperature excursions on door-equipped assets. Catching the open event and correlating it with temperature movement lets the store close the door or move product before an excursion becomes a loss, protecting the same product-loss exposure that Chedraui carried at roughly $5M a year. |
| Sustainability | Indirect | Avoidable refrigeration load from doors left open is avoidable energy and, over time, avoidable refrigerant and equipment stress. Reducing prolonged-open events lowers the energy and environmental impact of the refrigeration fleet without any claim to leak detection. |
The table below summarizes the alarms that fire directly from Refrigeration Door Exposure. Each row links to the full operational detail (trigger, preconditions, action plan, human role, escalation, prevention) in the SOPs catalog.
| Alarm | Description | Severity | Tier | AI executes? | Value drivers | SOP |
|---|---|---|---|---|---|---|
| Prolonged refrigeration door open | A door-equipped refrigeration asset's door remains open longer than the configured ceiling for its asset type and operational context. The SOP validates the door sensor, checks the restocking window, correlates temperature, notifies the store, and escalates if the door stays open or temperature risk develops. | Medium | Essential | Hybrid | Energy savings · Product loss prevention · Sustainability | Open SOP → |
More alarms in development (single-metric): an open-time-exposure trend that flags an asset drifting toward poor door discipline before a single event breaches, and a restocking-window learning aid that tightens the approved-window definition per asset. Composite alarms that pair door exposure with a developing temperature excursion to prioritize the doors most likely to cause a loss will appear in a future release.
The action plan for each alarm lives on its own SOP page in the SOPs catalog — with the diagnostic steps, human role, value drivers, escalation, and prevention specific to that alarm. The list below maps each alarm to its SOP.
A door sensor can fail stuck-open or drift, producing an implausibly long open event that is a data fault, not a real open door. Screen implausibly long events as possible sensor faults and exclude them from operational alarms until validated, and never read a binary closed signal as proof that the gasket is sealing. Confirm the sensor before dispatching or notifying on a prolonged-open event.
A burst of openings or a longer open event during an approved restocking window is expected activity, not an anomaly. Check the event against the asset's approved restocking windows and operating context before flagging it, so normal operation is not worked as an exception. The windows and the prolonged-open ceiling are configured per asset type and context.
When a door stays open past its ceiling outside an approved window, correlate it with the asset's temperature movement and notify the store so the door can be closed. If the temperature begins to move toward the band edge, recommend a product check on the affected category. Escalate if the door remains open after notification.
Per-alarm escalation criteria live in the Escalation block of each SOP in the SOPs catalog. The patterns below are metric-level — read from the portfolio view, not from any single alarm firing.