关键词: 社会网络分析, 食品安全, 食品供应链, 有害分析与关键点控制（HACCP）, 关键控制点

Abstract: Food safety concerns the national economy and the people’s livelihood. It is a major issue to be paid close attention by whole society. To effectively monitor the hazard levels in food supply chain, a directed graph model with Social Network Analysis（SNA） is built. Based on the k-step reachable matrix, the concepts and calculating methods of k-step observability and k-step controllability of network nodes are presented. Then, this paper composes the approach to analyze and select the critical control points with the comprehensive observability and controllability of nodes are constructed. And the influences of parameter setting on the convergence of the algorithm and the number of selected critical control points are discussed. Above works provide a necessary technical support to the food safety supervision department for implement HACCP in the food supply chains.

Key words: social network analysis, food safety, food supply chain, Hazard Analysis and Critical Control Points（HACCP）, critical control points