| HACCP is a new ensuring food security quality system in international food industry.This thesis introduces some basic theories about HACCP systematically, including the meaning of HACCP, the purpose, the elements, the principles, the characters, the applied steps and so on. At the same time, it analyzes the quality deficiency and its causes of UHT milk series. The hazard analyses were done through links of the raw material purchase, storage, producing process, finished goods warehousing and going out of warehouse, product sales, and after sale service and then the critical points that influences the quality were found out. Finally the methods of solving the problems were put out. Since this system is a protecting controlling management system, it is more accurate, and energy saving comparing to traditional analyses to finished goods.
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