Before the seven HACCP principles can be followed, a business must already have some essential food safety procedures in place. These are known as prerequisites, and they are the basic conditions needed to produce safe food. In a retail shop, they include buying products only from reputable suppliers, following personal hygiene procedures, running effective pest control, and keeping the premises clean, tidy and disinfected. Without these foundations, even a well-written HACCP plan will fail, because hazards will keep entering the business faster than the critical control points can deal with them.
That is why everyone who handles food needs to understand how to carry out safe food hygiene. You should be confident in your ability to identify hazards in your own work area and to follow the right control measures, whether that means checking a delivery, cleaning a slicer properly, or reporting a sign of pests to your supervisor.