Hazard Analysis: How to Do It Step-by-Step (With Real HACCP Examples)

Introduction

If HACCP has one part that shapes the whole system, it is hazard analysis. This is where you decide what can actually go wrong in your food process, how serious it is, and what must be controlled.

Many businesses find hazard analysis difficult because they either make it too theoretical or copy generic tables from somewhere else. In practice, both approaches create weak HACCP systems. A hazard analysis only works when it reflects the real food, the real process, the real equipment, and the real risks of the business.

The good news is that hazard analysis becomes much easier when you break it down step by step. That is what this article does.

We will explain what hazard analysis means, how to do it properly, and how to think through real examples in restaurants, catering, and food production settings.

What Is Hazard Analysis?

Hazard analysis is the process of identifying food safety hazards that may occur in a product or process, deciding which of those hazards are significant, and determining how they should be controlled.

In simple terms, hazard analysis answers three basic questions:

• What could go wrong?
• How serious is it?
• How will we control it?

This is the first principle of HACCP and one of the most important. If the hazard analysis is weak, the rest of the HACCP plan will usually be weak as well.

Identification

When you carry out a hazard analysis, you look at each step of the process and consider possible hazards in three main categories:

• biological hazards
• chemical hazards
• physical hazards

In many businesses, allergen control is also treated as a major food safety consideration and is often assessed alongside these hazards.

A proper hazard analysis should be linked to the real process flow. That means you do not just think about the product in general. You go step by step through receiving, storage, preparation, cooking, cooling, packing, display, service, or any other relevant stage.

Biology & Ecology

Most significant food hazards develop because food provides the right conditions for contamination, survival, or growth of harmful agents.

Biological hazards include microorganisms such as Salmonella, Listeria monocytogenes, Escherichia coli, Campylobacter, viruses, parasites, and sometimes toxins formed by microbial growth.

Chemical hazards may include cleaning chemical residues, pesticide residues, lubricants, allergens, or contamination from unsuitable packaging or materials.

Physical hazards may include glass, metal fragments, stones, wood splinters, plastic pieces, bones, or hard packaging fragments.

The reason hazard analysis matters is that these hazards do not affect every process step in the same way. For example, raw chicken may present a strong biological hazard during storage and preparation. A metal contamination risk may become more important after slicing or packing. A cleaning chemical hazard may become important after sanitation if rinsing is inadequate.

Global Distribution

Hazard analysis is used internationally as the starting point for HACCP-based food safety systems. Whether the business is a small kitchen, bakery, catering unit, supermarket deli, warehouse, or manufacturing plant, the principle is broadly the same: identify realistic hazards and determine how they will be controlled.

Different countries may allow different levels of simplification, especially for smaller businesses, but the basic logic of hazard analysis remains the same across food safety systems worldwide.

Risks / Damage

If hazard analysis is done badly, the whole HACCP system becomes unreliable.

Common mistakes include:

• copying generic hazards without thinking about the real process
• listing every possible hazard without deciding what is truly significant
• missing key hazards linked to the actual food handled
• confusing prerequisite programs with CCPs
• ignoring allergen or cross-contamination risks
• failing to update the analysis after process changes

In practice, weak hazard analysis can lead to:

• unsafe food reaching the customer
• unnecessary complexity in the HACCP plan
• poor monitoring systems
• repeated inspection problems
• fines, complaints, or product recalls

One of the most common real-world problems is when a business treats hazard analysis like a formality. Inspectors can usually tell when a table has been copied from a template and does not match the actual operation.

Signs of Weak Hazard Analysis

You can often spot a poor hazard analysis quickly. Warning signs include:

• the process flow does not match the real operation
• the same hazards appear at every step without logic
• important steps such as cooling or allergen handling are missing
• controls are vague or unrealistic
• staff do not understand why a hazard was identified
• CCPs are created for issues that should be managed through prerequisite programs

If the analysis is not practical, the system becomes harder to follow and less reliable.

Control & Prevention Methods

The best way to do hazard analysis is to follow a clear sequence. Keep it realistic, step-based, and specific to the food business.

Step 1: Describe the Product and Process Clearly

Start with the basics. What food are you dealing with? Is it raw, cooked, chilled, frozen, ready-to-eat, high risk, shelf stable, or allergen sensitive?

You should also understand:

• ingredients
• intended use
• target consumer where relevant
• storage conditions
• shelf life

This matters because hazard significance depends heavily on the type of food and how it is used.

Step 2: Build a Real Process Flow Diagram

Map the process step by step. A simple example might look like this:

• receiving
• chilled storage
• preparation
• cooking
• hot holding
• service

Or for a different product:

• receiving
• dry storage
• mixing
• baking
• cooling
• packing
• dispatch

The flow must reflect what really happens on site, not what should happen in theory.

Step 3: Identify Possible Hazards at Each Step

For each step, ask what biological, chemical, physical, or allergen hazard could reasonably occur.

At receiving, hazards may include contaminated raw materials, incorrect temperature on arrival, allergen mix-ups, or damaged packaging.

At preparation, hazards may include cross-contamination, poor hygiene, incorrect thawing, or foreign material introduction.

At cooking, the main hazard may be survival of pathogens if heating is inadequate.

At cooling, the main hazard may be bacterial growth if cooling is too slow.

At packing, hazards may include contamination from equipment, packaging mix-ups, or labeling errors.

Step 4: Decide Which Hazards Are Significant

Not every possible hazard becomes a significant hazard in the HACCP plan. This is where judgment matters.

A hazard is usually considered significant when:

• it is reasonably likely to occur unless controlled
• it could cause serious harm if not controlled

In practice, many hazard analyses become unusable because they list everything but do not prioritize anything.

For example, in cooked chicken, survival of pathogens during cooking is usually significant. But a metal contamination hazard during chilled storage may not be significant at that specific step unless there is a realistic reason.

Step 5: Identify Existing Controls

Once you identify a significant hazard, ask how it is controlled.

Controls may come from:

• prerequisite programs
• a process step that may become a CCP
• supplier control
• cleaning and sanitation
• allergen procedures
• temperature control

This step is important because not every significant hazard leads to a CCP. Some hazards are effectively controlled by strong prerequisite programs.

Step 6: Decide Whether a CCP Is Needed

If the hazard is significant and the step is essential to prevent, eliminate, or reduce it to an acceptable level, then that step may be a Critical Control Point.

Examples often include:

• cooking
• cooling
• chilled holding in some systems
• metal detection
• acidification in some products

But if the hazard is adequately controlled by a prerequisite program, then a CCP may not be needed.

Step 7: Review the Analysis Against Reality

Before finalizing it, compare the analysis with actual practice on site.

Ask:

• Does this flow match reality?
• Do staff actually work this way?
• Have we missed a step such as rework, cooling, or reheating?
• Do our hazards make practical sense for this product?

A hazard analysis should work in the real world, not only on paper.

Real Examples

Example 1: Cooked Chicken in a Restaurant

Process steps: receiving, chilled storage, preparation, cooking, hot holding, service

Receiving: possible biological hazard from contaminated raw chicken; control through approved supplier and temperature checks on delivery

Chilled storage: possible growth or cross-contamination; control through refrigeration and separation of raw foods

Preparation: possible cross-contamination from hands, boards, or utensils; control through hygiene and separation practices

Cooking: significant hazard is survival of pathogens; this may be a CCP controlled by minimum core temperature

Hot holding: possible growth if temperature falls too low; depending on the operation, this may be a CCP or strongly managed control

Service: risk of contamination if handling is poor; control through staff hygiene and time control

Example 2: Fresh Salad Preparation

Process steps: receiving vegetables, chilled storage, washing, cutting, mixing, chilled holding, service

Main hazards: contamination on raw produce, cross-contamination during preparation, allergen mix-ups, poor temperature control during holding

Because there is no kill step like cooking, supplier control, washing procedures, staff hygiene, separation, and chilled holding become especially important. In this kind of process, strong prerequisite programs are critical.

Example 3: Bakery Producing Cream-Filled Pastries

Process steps: receiving ingredients, storage, mixing, baking, cooling, filling, chilled storage, display

Baking: may control biological hazards in the baked component

Cooling and filling: may introduce contamination if hygiene is weak

Chilled storage: important for controlling growth in cream-filled products

Allergen hazards: likely significant because of ingredients such as milk, eggs, wheat, or nuts

This example shows why hazard analysis must reflect the actual product, not only the building.

Example 4: Dry Food Packing Line

Process steps: receiving dry ingredients, dry storage, sieving, mixing, packing, metal detection, dispatch

Main hazards: physical contamination, allergen cross-contact, wrong label, contamination from equipment or packaging

In this process, metal detection may be a CCP, while many other hazards may be managed through prerequisite controls such as supplier approval, line clearance, cleaning, and labeling checks.

Advanced / Professional Approaches

In stronger HACCP systems, hazard analysis is supported by technical knowledge, product understanding, process data, and site-specific experience.

Professional hazard analysis often takes into account:

• the nature of the raw materials
• the vulnerability of the intended consumer
• historical incidents or complaints
• equipment design
• product shelf life
• allergen profile
• environmental contamination risk
• pest activity or storage weakness

For example, pest activity may not create a CCP in most cases, but it can still be highly relevant to hazard analysis because it affects contamination risk across storage and production areas. See our guide on cockroach control and see our guide on rodent control for related food business risks.

Good hazard analysis should also be reviewed whenever products, ingredients, equipment, layout, suppliers, or process flow change.

Cultural or Historical Context

Hazard analysis sits at the heart of HACCP because modern food safety moved away from reacting to problems and toward preventing them. Instead of waiting for unsafe food to cause illness or trigger complaints, the business must think ahead and identify where danger can arise in the process.

That preventive mindset is one of the main reasons HACCP became so influential worldwide.

FAQ Section

What is hazard analysis in HACCP?

Hazard analysis is the process of identifying food safety hazards, deciding which ones are significant, and determining how they should be controlled.

What types of hazards are considered?

The main categories are biological, chemical, and physical hazards. Allergen risks are also very important in many food businesses.

Does every hazard become a CCP?

No. Some hazards are controlled through prerequisite programs, while others may require a CCP if control at a specific step is essential.

What is the biggest mistake in hazard analysis?

One of the biggest mistakes is copying generic hazards without matching them to the real product and the real process.

Do small food businesses need hazard analysis?

Yes. Smaller businesses may use a simplified approach, but they still need to understand what hazards matter in their operation and how they are controlled.

How often should hazard analysis be reviewed?

It should be reviewed whenever there is a significant change in product, ingredient, equipment, process, layout, supplier, or food safety risk.

Why is hazard analysis so important?

Because it determines what the business focuses on. If the analysis is wrong, the rest of the HACCP system is likely to be weak as well.

Final Thoughts

Hazard analysis is where HACCP becomes practical. It turns food safety from a general idea into a step-by-step assessment of what can really go wrong in your own operation.

If you do it properly, the whole system becomes clearer. You know what matters, what is significant, and where control is essential. If you do it badly, the system becomes confusing, overcomplicated, or disconnected from reality.

In practice, the best hazard analyses are simple, logical, site-specific, and based on the way food is actually handled every day.

Disclaimer

This article is for informational purposes only. Food safety (HACCP) and pest control requirements vary by country, authority, and type of food business. For legal compliance and audit readiness, always consult a qualified HACCP professional and a licensed pest control operator in your area.
All pest control measures must use approved products and be applied strictly according to the product label, as required by law in most jurisdictions (including the EU, UK, and USA). Improper use of pesticides, lack of documentation, or absence of a structured pest monitoring program may lead to non-compliance, fines, or business closure.
A compliant system must include documented procedures, monitoring records, corrective actions, and verification. Pest control is not optional—it is a core prerequisite program under HACCP and must be properly implemented, recorded, and reviewed.

Author Bio

Nasos Iliopoulos: https://advancepestx.com/nasos-iliopoulos/
BSc Agronomist & Certified Pest Control Expert
Scientific Director – Advance Services (Athens, Greece)
Licensed Pest Control Business – Ministry of Rural Development & Food (GR)

References

Codex Alimentarius – General Principles of Food Hygiene (CXC 1-1969) – https://openknowledge.fao.org/handle/20.500.14283/cc6125en

European Commission – Food hygiene – https://food.ec.europa.eu/food-safety/biological-safety/food-hygiene_en

European Union – Regulation (EC) No 852/2004 on the hygiene of foodstuffs – https://eur-lex.europa.eu/eli/reg/2004/852/oj

FAO – Introduction to Hazard Analysis and Critical Control Point (HACCP) – https://doi.org/10.4060/cc6246en

U.S. Food and Drug Administration – HACCP Principles & Application Guidelines – https://www.fda.gov/food/hazard-analysis-critical-control-point-haccp/haccp-principles-application-guidelines

World Health Organization – Food Safety – https://www.who.int/health-topics/food-safety