3.1 Prerequisite Programs (GMPs, SOPs, SSOPs, & GRPs)

3.1 Prerequisite Programs (GMPs, SOPs, SSOPs, & GRPs)

Exam Key: Prerequisite Programs (PRPs) are the foundational operational and environmental conditions required to produce safe food. They manage general, facility-wide hazards so that the Hazard Analysis Critical Control Point (HACCP) system can focus specifically on critical process steps. Without verified PRPs, a HACCP plan will fail.

The Architecture of Food Safety Management

Food safety systems operate as a pyramid. At the broad base sit Prerequisite Programs (PRPs), which establish baseline sanitary and operational conditions. Built upon this foundation are specialized control systems such as HACCP (Hazard Analysis Critical Control Point) and HARPC (Hazard Analysis and Risk-Based Preventive Controls).

                    /
                   /  HACCP / HARPC  \
                  /  Critical Control \
                 /      Points (CCPs)  \
                /-----------------------\
               /  Prerequisite Programs  \
              / (cGMPs, SSOPs, SOPs, GRPs)\
             /-----------------------------\
            /  Facility Design & Infrastructure\
           /-----------------------------------\

If PRPs are weak or improperly monitored, hazards that should be routinely controlled by general sanitation (such as Listeria monocytogenes on floors or unwashed employee hands) enter the processing stream, creating unacceptable risks that process-level Critical Control Points (CCPs) are not designed to eliminate.

---

Current Good Manufacturing Practices (cGMPs)

Good Manufacturing Practices (GMPs) are federal regulations that outline the minimum sanitary and processing conditions required for manufacturing, processing, packing, or holding human food. Under the FDA Food Safety Modernization Act (FSMA), federal cGMPs were updated and relocated from 21 CFR Part 110 to 21 CFR Part 117 Subpart B.

Core cGMP Requirements (21 CFR Part 117 Subpart B)

---

Standard Operating Procedures (SOPs) & SSOPs

While cGMPs define what sanitary conditions are required by law, Standard Operating Procedures (SOPs) define how a specific facility performs daily tasks. In food safety, procedures are categorized into general operational SOPs and specialized Sanitation Standard Operating Procedures (SSOPs).

SOP vs. SSOP Distinctions

• Standard Operating Procedures (SOPs): Written, step-by-step instructions for non-sanitation operational tasks, such as ingredient weighing, thermal process timing, equipment calibration, or receiving raw materials.
• Sanitation Standard Operating Procedures (SSOPs): Written, step-by-step procedures specifying exact methods for cleaning and sanitizing food-contact surfaces and environmental areas. SSOPs are federally mandated for USDA-inspected meat and poultry plants (9 CFR Part 416) and FDA-regulated facilities.

The Two Phased Components of SSOPs

1. Pre-Operational SSOPs: Procedures conducted before daily production begins. They ensure equipment and facilities are clean and sanitized prior to introducing food. Pre-op procedures require visual inspection, organoleptic evaluation (no residual odors or residues), and ATP bioluminescence or microbiological swab testing of food-contact surfaces.
2. Operational SSOPs: Sanitation procedures executed during active production. They outline mid-shift cleanups, line clearance protocols between product allergen runs, employee hygiene monitoring, and emergency cleanup protocols following product spills or sewer backups.

Anatomy of a Compliant SSOP

A legally defensible SSOP must specify five core elements:

1. Title & Purpose: Clear identification of the equipment or area (e.g., SSOP #04: Slicer #2 Pre-Op Sanitation).
2. Frequency & Responsibility: Exactly when the cleaning occurs and who (by job title) is responsible.
3. Required Chemicals & Tools: Precise chemical names, approved concentrations (e.g., 200 ppm quaternary ammonium or 50–100 ppm free chlorine), water temperature ranges, and non-abrasive scrubbing tools.
4. Step-by-Step Instructions: Detailed sequence: Dry clean/scrape $→$ Pre-rinse ($110^{°}F$–$120^{°}F$) $→$ Apply detergent/foam $→$ Scrub $→$ Final rinse $→$ Inspect $→$ Apply sanitizer $→$ Air dry.
5. Verification & Sign-off: Space for the operator's signature, reviewer's signature, date, and corrective action notes if pre-op inspection fails.

---

Good Retail Practices (GRPs)

In retail food establishments, restaurants, and food service operations, the principles of manufacturing cGMPs are translated into Good Retail Practices (GRPs) under the FDA Food Code. GRPs control basic operational hazards and prevent environmental contamination.

FDA Food Code Hazard Classification

Under modern FDA Food Code frameworks, inspection items are divided into three tiers:

• Priority Items ($P$): Controls directly linked to eliminating or reducing foodborne illness hazards (e.g., cooking temperatures, hot/cold holding). Equivalent to CCPs.
• Priority Foundation Items ($Pf$): Specific supporting practices that enable Priority items to function (e.g., availability of calibrated thermometers, soap at hand sinks, cooling logs).
• Core Items / Good Retail Practices (GRPs): General environmental, facility maintenance, and sanitation practices (e.g., physical facility repair, outer opening screening, light bulb shielding, equipment air gaps).

Essential GRP Focus Areas

• Handwashing Stations: Must provide water at a minimum temperature of $100^{°}F$ ($38^{°}C$), hand-cleansing soap, single-use paper towels or heated-air dryers, and a waste receptacle. Handwashing must last at least 20 seconds total, with 10–15 seconds of vigorous scrubbing.
• Pest Exclusion: Screening outer openings with 16-mesh per square inch screening, self-closing doors, weather stripping, and air curtains over loading docks.
• Plumbing Protection: Installing physical air gaps (minimum twice the diameter of the supply pipe, never less than 1 inch) or approved mechanical backflow preventers (such as Reduced Pressure Zone / RPZ devices) to prevent back-siphonage of non-potable water into potable lines.

---

Supplier Approval & Traceability SOPs

Prerequisite programs extend beyond the physical facility to encompass the entire supply chain.

Supplier Approval Programs

Food facilities must maintain a formal Approved Supplier Program. Raw materials and packaging must only be accepted from suppliers that have undergone rigorous evaluation. Verification methods include:

• On-site food safety audits by certified third-party auditors (GFSI benchmarked schemes such as SQF, BRCGS, or FSSC 22000).
• Review of supplier food safety plans, HACCP/HARPC documentation, and regulatory compliance history.
• Certificates of Analysis (COAs): Requirement that incoming lots are accompanied by analytical test results verifying compliance with microbiological (e.g., Salmonella negative) and chemical specification limits.

Trace-Forward & Trace-Back SOPs

Under federal regulations (including the Bioterrorism Act of 2002 and FSMA Section 204 Food Traceability Rule), food operations must maintain complete traceability records: one step back (identifying the immediate supplier) and one step forward (identifying the immediate commercial recipient).

[ Supplier ]  ===>  [ Your Facility ]  ===>  [ Commercial Customer ]
 (Step Back)          (Lot Tracking)          (Step Forward)

• Lot Code Tracking: Raw ingredients must be assigned unique internal lot numbers upon receipt and tracked through processing to finished product packaging.
• Mock Recalls: Traceability SOPs must be validated by conducting semi-annual mock recalls. A successful mock recall must achieve 99.5% or greater product accounting within a target timeframe of 2 hours or less.