Quick answer
Investigate produce spoilage by aligning affected and unaffected lots with product requirements, receiving condition, cooling history, calibrated readings, packaging and handovers. Codex supplies a hygiene and HACCP framework, not a diagnosis or universal storage setting. Record missing evidence before choosing equipment. Air-temperature recovery does not prove product safety; qualified quality personnel decide hold or release, while engineers assess refrigeration changes.
Key takeaways
- Can I tell from this guide whether a lot is safe to sell? No.
- What is the right cold-room temperature for produce? There is no single setting.
- Is postharvest decay the same as a food-safety hazard? Not necessarily.
- What records matter most? Time-temperature data (air and product), logger positions and calibration, door/defrost/power events, humidity observations, lot details and handling history.
Reviewed: 2026-10-15 · ColdMatch Group
Why spoilage investigations go wrong
Spoilage usually has more than one cause. A short temperature break, a crowded room that blocks airflow and bruising at harvest can all show up as the same soft or decayed product. Teams that act on the first visible symptom often fix the wrong thing. The UC Davis Postharvest Center explains in its cold-chain resources that losses accumulate across every handling step, not only in the store.
Step 1: hold the lot and protect the evidence
Mark affected pallets as HOLD, keep them physically separate and stop dispatch until a qualified person decides their status. Photograph the room, stacking pattern and product before moving anything. Do not reset loggers or controllers until data has been downloaded.
Step 2: gather time-temperature records
Download every relevant logger and controller record for the period from receiving to discovery. Compare air temperature with product (pulp) temperature where available, and note logger positions — a sensor near the evaporator can read very differently from the warmest pallet. The UC Davis temperature-management documents stress that product temperature, not room setpoint, is what governs deterioration.
Step 3: record commodity, lot and maturity details
Record commodity, variety, maturity, harvest date, grower or supplier, arrival temperature and time from harvest to cooling. Recommended storage conditions differ by commodity and maturity; check the relevant UC Davis produce fact sheet rather than assuming one room setting suits everything. Mixed loads can expose chilling-sensitive or ethylene-sensitive products to unsuitable conditions.
Step 4: check airflow, loading, doors and moisture
Look for blocked return-air paths, pallets stacked against walls, overfilled rooms, frequent or long door openings, defrost problems, and condensation or ice. Wet surfaces and condensation can encourage decay, while dry air can cause shrivelling. The FAO post-harvest and cold-chain guidance describes how poor air circulation and inadequate cooling capacity create warm spots inside stacks.
Step 5: review packaging and handling history (printable log below)
Packaging that restricts ventilation, damaged cartons, rough handling and delays before pre-cooling all leave signs: bruising patterns, wounds that start decay, and warm cores in tight stacks. Use the log below to keep the evidence in one place.
| Field | Record |
|---|---|
| Lot / commodity / variety / maturity | |
| Room and position in room | |
| Excursion start and end (date, time) | |
| Logger IDs and calibration date | |
| Air vs product (pulp) readings | |
| Door, defrost, power and alarm events | |
| Humidity / condensation / ice observed | |
| Packaging, stacking and handling notes | |
| Lot status (HOLD / released by whom) | |
| Person recording, date |
Step 6: separate quality causes from food-safety decisions (who to contact)
Quality causes — chilling injury, water loss, bruising, over-ripening, postharvest decay — explain why product lost value. Whether any lot can be sold, reworked or must be destroyed is a food-safety and regulatory decision. Hold the lot and follow your HACCP or food-safety plan.
- Shift lead / store manager — places HOLD, downloads data.
- Food-safety or QA lead — owns the decision on lot status under your food-safety plan.
- Refrigeration service provider — checks equipment, defrost, sensors and calibration.
- Supplier / grower and customer — as required by contract.
- Competent food authority — where law or your plan requires notification.
What to change after the investigation
Typical outcomes are revised receiving checks, faster pre-cooling, better stacking patterns, sensor relocation or calibration, alarm escalation rules and, sometimes, more refrigeration or airflow capacity. Estimate the effect of loss on your costs with the landed cost and spoilage calculator and check room duty with the refrigeration load calculator.
How ColdMatch fits in
If the investigation shows your facility needs new capacity, pre-cooling or monitoring, you can scope it in the RFQ builder. For commercial projects from USD 250,000, the ColdMatch team reviews the request, approaches suitable suppliers on your behalf and organises comparable responses. ColdMatch does not judge food safety or the status of any lot.
*Educational content only, prepared by the ColdMatch Group editorial team from the cited UC Davis and FAO sources. It is not food-safety, legal or engineering advice and cannot determine whether any product is safe to sell or eat. Last reviewed: 13 October 2026.*
How do ERP, monitoring and packaging records isolate an incident?
Join ERP/WMS lot IDs to receipt, dispatch and calibrated logger timestamps. Preserve timezone, pallet position, package condition, loading and alarm acknowledgement. ERP/WMS establishes movements and FEFO; monitoring provides raw readings, calibration and gaps; packaging specialists assess actual configuration and damage; quality personnel own approved limits and hold/release decisions. Product and air temperatures are not interchangeable.
Worked method, not a customer case: align receiving, cooling, storage and dispatch for comparable affected/unaffected lots of the same product and package. Mark missing evidence. A deviation near a door event is a hypothesis, not proven causation. Obtain qualified diagnosis; recovered air temperature alone never justifies lot release.
Planning education only: ERP, packaging and certification are complementary interfaces, not a new ColdMatch product catalogue. No affiliation, certification, engineering approval, lot release or savings is implied. Codex provides a hygiene/HACCP framework; FAO/UNEP provides system context, not universal temperature or sensor-spacing rules.
Codex CXC 1-1969 · FAO/UNEP 2022
Three steps to a reviewed refrigeration RFQ
- Define product, site, peak throughput and evidenced problem.
- For industrial projects from USD 250,000, submit one refrigeration brief with logs, assumptions and interface responsibilities.
- ColdMatch reviews and organises the request, contacts suitable suppliers on your behalf and presents organised responses for human comparison; no automatic contact or guaranteed outcome.
When is this method useful?
Use when investigating documented quality incidents before requesting a refrigeration change. Do not use logger readings alone to diagnose pathogens, release a lot or prescribe a product temperature.
- Select comparable lots of the same product and packaging.
- Align timestamps, timezone, pallet position and receiving condition.
- Separate air and product readings; flag calibration gaps and missing intervals.
- Compare cooling, doors, dwell and handling before inferring causes.
- Have quality and engineering reviewers define corrective options and acceptance evidence.
Decision gates before committing CAPEX
| Buyer / question | Evidence to collect | Decision gate |
|---|---|---|
| Operations: what changed? | kWh, tonnes, operating hours, weather and meter boundary for the same period | Diagnose before specifying replacement |
| Quality: why was product rejected? | Lot condition, product limits, calibration, raw logs and handover times | Qualified hold/release; missing is not zero |
| Procurement: which option fits? | Equal duty, inclusions, exclusions, service and acceptance tests | Request clarification before scoring |
| Finance: does the investment hold up? | Incremental margin, avoided costs, full CAPEX, recurring OPEX, ramp-up and downside | No double counting or guaranteed return |
Evidence and planning worksheet
Sources checked 15 October 2026: FAO/UNEP (2022), system-level food cold chains; Codex CXC 1-1969 (2023 publication), hygiene/HACCP; EVO IPMVP, measurement and verification; World Bank procurement framework, value-for-money principles. These sources do not validate this project, local permits, a specific savings rate or sensor spacing. Confirm applicable local rules with competent professionals.
FAO/UNEP 2022 · Codex · EVO IPMVP · World Bank
Blank planning worksheet (CSV; no email required)
From evidence to a reviewed RFQ
- Define product, site, peak duty and evidence gaps.
- Submit a supplier-neutral brief for industrial projects from USD 250,000; ColdMatch qualifies and organises it.
- The ColdMatch team contacts suitable suppliers on your behalf and presents organised responses for human comparison. No automatic supplier connection, supplier certification, promised quote count or guaranteed result. ColdMatch is the industrial refrigeration vertical of Global B2B Group, not a manufacturer, installer or lender.
Planning calculator (English) · Prepare the three-step RFQ · Global B2B Group procurement framework
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Pre-cooling and storage capacity plus indicative payback from spoilage reduction.
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Annual energy spend from load and running hours, plus the cost of generator hours during outages.
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