Cold Holding

Critical Control Point

Food Safety Management System (FSMS) – Technical Documentation

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1. Introduction

Cold Holding as a Critical Control Point

Cold holding is the process of maintaining ready-to-eat or ready-to-serve foods at safe chilled temperatures, typically at or below 5°C. It is a key component of food service operations where temperature-sensitive foods must be presented to customers in a safe condition, without allowing microbiological risks to escalate.

This includes:

• Salads and sandwich components

• Deli meats and cheeses

• Chilled desserts

• Sushi, cold seafood, and dairy-based items

• Pre-plated entrées awaiting service

Cold holding is designated as a Critical Control Point (CCP) in most HACCP systems due to its role in preventing bacterial growth in foods that are not subsequently cooked or reheated.

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2. Hazards

Microbiological Hazards Controlled by Cold Holding

Chilled foods are especially vulnerable to microbial contamination and growth if held at unsafe temperatures. Holding them at or below 5°C significantly slows the growth of pathogens such as:

• Listeria monocytogenes

• Salmonella spp.

• Escherichia coli O157:H7

• Campylobacter spp.

Foods held between 5°C and 60°C enter the temperature danger zone, which promotes rapid bacterial multiplication and raises the risk of foodborne illness.

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3. Critical Limits

Critical Limit for Cold Holding

Control Parameter	Standard
Maximum temperature	≤ 5°C
Monitoring frequency	At setup and periodically during service
Monitoring method	Thermal image with surface temp detection

Any food found to be held above 5°C during cold holding must be evaluated for time exposure and discarded or escalated per corrective action procedures.

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4. HACCP Audit Table

Step	Hazard	Control Measure	CCP?	Critical Limit	Monitoring Method
Cold holding	Pathogen growth in chilled foods	Maintain temperature ≤ 5°C	Yes	≤ 5°C	Thermal image + AI temp validation
	Lack of documentation or evidence	Image and timestamp logging	Yes	Record must be captured	Didge Platform submission (auto-logged)

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5. Use Cases

Typical Cold Holding Use Cases

• Food is prepared and pre-chilled (e.g., salads, desserts)

• Transferred into:

  • Cold displays

  • Refrigerated wells

  • Chilled bain-maries

  • Ice beds or blast chillers

• Customer self-service or staff plating occurs during the service window

• Food is not reheated before service and therefore must remain at safe chilled temperatures until consumption

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6. Compliance

AI + Thermal Imaging for Cold Holding Compliance

Step 1: Capture the Image

• A thermal image is taken of the cold-holding unit or display (e.g., salad bar)

• The image records:

  • The surface temperature of the food

  • Visual confirmation of presentation and holding environment

  • Contextual information (e.g., tray, plate, refrigeration unit)

Step 2: AI Analysis

• The image is sent to the Didge Platform

• AI extracts and populates:

  • Exact surface temperature from the thermal data

  • Food item and category (e.g., dairy, seafood, vegetable)

  • Portion count (if identifiable)

  • Container type (plate, tray, gastronorm)

  • Service location (e.g., cold pass, buffet)

  • Timestamp and metadata from the device

Step 3: Auto-Submission to FSMS Platform

• The populated data is submitted into the Didge Platform as a unique operation instance

• All relevant fields are stored for traceability:

  • Food item

  • Temperature

  • Service equipment

  • Serving format

  • Number of portions

  • Image evidence

  • Date/time stamp

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7. Benefits

Benefits of AI & Imaging in Cold Holding Control

High Efficiency for Frontline Staff

• Quick image capture replaces manual checks and logs

• Allows high-frequency monitoring without effort

Data-Rich, Evidence-Based Submissions

• Images include thermal and visual data, forming verifiable records

• Large sample sizes easily generated across all meal periods

Regulatory & Audit Compliance

• Fully supports:

  • ISO 22000 (documented CCP validation)

  • Codex HACCP (time/temperature safety)

  • Local food safety regulations

• Didge enables:

  • Web-based reports

  • Data table aggregation

  • Export to PDF, Excel, or CSV

Visual Monitoring of Food Integrity

• Detects if chilled items appear compromised (e.g., sweating, condensation)

• Identifies if products are improperly displayed or partially exposed

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8. Summary

Summary: Cold Holding CCP Compliance Using Thermal Imaging + AI

Integrating thermal imaging and AI processing into cold holding procedures enables modern, defensible, and scalable compliance with CCP #6. This process ensures:

• Chilled food is documented at ≤ 5°C

• Records are visual, timestamped, and automatically stored

• Submissions are easy for frontline staff

• Performance data and audit records are readily available

This approach significantly reduces administrative burden, increases accountability, and ensures safe service of cold foods at scale.

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