Abstract:

A new model for evaluating food safety risks and optimizing the supervision of food safety based on the supply
chain is put forward by fault tree analysis (FTA). In the model, the food safety problems are the initial events, and the
natural toxin, biological hazard factors and chemical hazard factors are considered as the later events. The operation faults
and monitoring faults of every step of the supply chain are considered as the bottom events. Moreover, arithmetic models on
evaluating food safety risk and the importance of bottom events in the supply chain are achieved based on the methods of
probability risk and sensitivity analysis. The results of statistical data analysis on the food safety of livestock and poultry products
in Shenzhen market during 2011–2013 showed that, by using this model, the food safety risk status can be rapidly judged and the
critical control points can be discerned by taking full advantage of existing food monitoring data and information.

Key words: food supply chain, food safety risk evaluation, food safety supervision optimization, critical control points, fault tree analysis (FTA)