A step by step map of a food process, from receipt to service, used as the basis for hazard analysis.
A step by step map of a food process, from receipt to service, used as the basis for hazard analysis. A process flow diagram is a simple, sequential map of all the steps a food goes through in a business, typically from receipt of ingredients, through storage, preparation, cooking, cooling and holding, to service or dispatch. In HACCP it is prepared before the hazard analysis, because you cannot reliably identify hazards until you have laid out every step where they could occur. The diagram does not need to be elaborate. Its value is completeness and accuracy: it should reflect what actually happens on the floor, including steps that are easy to overlook such as thawing, reheating or holding for display. Once drawn, it is confirmed against the real process, then each step is examined during hazard analysis. For an Australian food business developing a food safety program under Standard 3.2.1, a process flow diagram is a normal starting point. Even businesses using the simpler food safety management tools under Standard 3.2.2A benefit from mentally or physically mapping how food moves, so no risky step, such as slow cooling or extended display, is missed. A useful diagram is walked through against the actual operation to check it is right. Staff often realise a step is missing or done differently than assumed, which is exactly the point: an accurate flow diagram means the hazard analysis and the resulting controls are built on what the kitchen really does. A Canberra sandwich shop draws a process flow diagram for its cooked chicken: receive, cold store, cook, cool, cold store, portion, assemble, cold display, sell. Mapping each step makes it clear that cooling and cold display are where bacterial growth is most likely, focusing its hazard analysis on those points.
Frequently asked questions
What is a process flow diagram?
It is a step by step map of a food process, from receipt to service, used as the basis for identifying where hazards could occur.
Why is a process flow diagram important in HACCP?
It ensures every step of the process is considered, so hazard analysis does not overlook a stage where a hazard could arise.
How detailed should a flow diagram be?
Detailed enough to capture every step that matters for food safety, including easily missed ones like thawing, reheating and holding, but no more complex than needed.
Should the flow diagram be checked against reality?
Yes. It should be confirmed by walking through the actual process, because staff often find steps that differ from what was assumed.
Do small businesses need a process flow diagram?
It is not always mandatory, but even a simple map helps a small business spot the risky steps in its process and target its controls.
