ISO 22000 clause 8.5.1.5.1: draw a flow that reveals food safety questions
ISO 22000 clause 8.5.1.5.1 requires the food safety team to establish, maintain and update documented flow diagrams for products or product categories and processes within the FSMS. The diagrams support hazard analysis by showing where hazards may occur, change or enter the process. Their value comes from clarity, accuracy and sufficient detail.
What clause 8.5.1.5.1 requires in practice
Here the food safety team builds the flow diagrams that the hazard analysis will use. Each diagram addresses one product or product category, together with the processes that fall within what the food safety management system covers. It is a graphic of the process, kept as documented information and updated when the process changes. The clause expects the diagram to be clear, accurate and detailed enough for the analysis, and it lists what to show where relevant: the order and interaction of steps, any outsourced processes, the points at which materials, ingredients, processing aids, packaging, utilities and intermediate products enter, the places where rework and recycling occur, and the points where finished goods, intermediates, by-products and waste leave. The diagram exists so the team can judge where a hazard may appear, grow, shrink or be introduced. No particular notation is demanded.
Start with sequence and interaction
Identify the actual operational steps and how they connect. Include relevant branches, transfers and returns rather than assuming every product follows one uninterrupted line. The diagram should make it possible to discuss hazards at meaningful stages.
Show outsourced processes where relevant. An activity performed elsewhere can still be part of the process being analysed. Excluding it from the diagram can hide a handover or an assumption about control by another organisation.
Use product or process groupings carefully. If products follow different routes or have materially different handling, make that difference visible. Grouping is a practical choice, not a reason to erase relevant variation.
Show what enters and leaves
Represent relevant entry points for materials, ingredients, processing aids, packaging, utilities and intermediate products. These interfaces can matter because a hazard may enter at a point that is not obvious from the main product sequence.
Include rework and recycling where they occur. Their routes may connect different stages or lots, so a simple return arrow without an understandable destination can be inadequate. Use sufficient detail for the team to assess the actual arrangement.
Identify where end products, intermediate products, by-products and waste leave or are removed. These movements help explain the process and may identify interfaces requiring further consideration in the supporting description.
Choose detail that supports a decision
A diagram should be readable enough for the food safety team and operating personnel to discuss together. Use clear labels and an understandable structure. The standard does not prescribe software, colours or a universal symbol convention.
Do not try to place every operating parameter on the drawing if that makes it unusable. Link relevant detail through the process description. The two should form a coherent account of the operation.
Why clause 8.5.1.5.1 matters to the business
A diagram is the map the whole hazard analysis travels on. If a branch is missing, nobody asks what could go wrong there. Many real food safety failures start at the edges of the main line, such as a return of material, a temporary hold or a step done by another company. Showing those edges helps the team avoid costly surprises, and it makes training easier because new staff can see how their task fits the whole. Customers and certifiers also read diagrams to judge whether a supplier understands its own operation, so a clear one supports trust and shortens questions during reviews.
How to implement clause 8.5.1.5.1
Build the diagram in a workshop with people who do the work, not at a desk from an old procedure.
- Choose a naming style based on process steps rather than department names, so every box describes something that happens to the food.
- Draw the main route first, then add side routes for rework, recycling and anything held or reprocessed.
- Mark where each input type enters, including packaging and utilities that touch the food or its surroundings.
- Show outsourced steps as part of the flow and note who performs them.
- Show where finished product, intermediate product, by-products and waste leave, so those movements can be examined too.
- Keep detail at a level the team can discuss in a meeting; link longer operating detail to the process description instead of crowding the page.
- Give each diagram an identifier, a date and an owner, and store it where analysis files point to it.
Illustrative ingredient-manufacturing example
An ingredient producer initially draws only its main processing sequence. During preparation, operators identify a routine return of material from a later stage and an externally performed step. The team adds both routes and the relevant entry and exit points.
The revised diagram allows the hazard-analysis discussion to consider the actual process relationships. It does not assume that the main line alone represents all material movement.
Illustrative catering example
A caterer maps preparation, packing, transport and service at a separate location. The diagram identifies where packaging enters and where responsibility passes to the service operation. A branch shows an alternative service arrangement that is used for certain contracts.
The team keeps the drawing clear by linking detailed service conditions to a supporting description. This preserves readability without hiding the difference between the routes.
Evidence and common mistakes
The maintained diagrams are required documented information. Give them suitable identification and control so the team knows which version supports the current analysis. Follow preparation with on-site confirmation.
Common mistakes include copying an industry diagram, omitting side streams and using department names where process steps are needed. Another is drawing a proposed future arrangement without clearly distinguishing it from the process currently operating.
When a relevant change occurs, update the diagram and consider the effect on hazard analysis. A revised drawing is part of the review, not necessarily its complete outcome.
Frequently asked questions
Are utilities relevant to the diagram?
Include their entry where appropriate to the process and hazard analysis. Supporting descriptions can explain the relevant detail.
Must outsourced stages be shown?
Include relevant outsourced processes so the sequence and interfaces used in the analysis remain accurate.
Can a simple drawing meet the requirement?
Yes, if it is clear, accurate and sufficiently detailed. Complexity of appearance is not evidence of completeness.
Make hidden process routes visible
Discuss a flow-diagram workshop with Sterling to examine inputs, returns and external interfaces. Support can include controlled documentation and suitable Effivity ISO & GRC automation software arrangements. Review HACCP Awareness, with the flow-and-process guide and hub for the wider context.