Abstract:The batch mixing exists for fresh-cut vegetables from purchasing, processing to packaging, and there is mutual restrictive relationship between batch mixing degree and purchasing cost. The single- objective model cannot meet the requirement of flexible production. Therefore, a kind of purchasing cost- recall model was proposed to build batch relations between raw material and order products. According to production plan and process flow of fresh-cut processing enterprise, taking the batch mixing degree and the purchasing cost as objective functions, a mixed-integer linear programming model was established to meet the order requirements and the suppliers’ raw material conditions. Since the weight of recall number was more important than that of procurement costs, and high correspondence relationship existed between recall number and batch mixing degree, the hierarchical sequence method was used to solve the multi-object model. The established model was analyzed by the LINGO software in the step-by-step solution process. The model performance was evaluated with parameters, such as purchase cost, average number of recall and the maximum number of recall. The results showed that with the increase of batch mixing degree, the procurement costs of raw materials were reduced gradually. When batch mixing degree was 10, the lowest cost of purchase was 2 840.33 yuan, the average recall quantity was 177.50 kg, and the maximum recall quantity was 420 kg. In order to evaluate the practical applicability of the model, the average recall ratio and maximum recall ratio were introduced. The results showed that when batch mixing degree was 10, the average recall ratio and maximum recall ratio were 15.5% and 36.8%, respectively, which were suitable for medium and small fresh-cut processing enterprises.
