The Models Of Purchase Decision Based On Theory Of Fuzzy Sets

In recent years, as China's enterprise system reform, an increasing number of research institutes begin the implementation of the autonomous mode, another plus procurement of goods prices has shown a rising trend of such enterprises. It has led to the market competition is becoming increasingly intensified. In the procurement enterprises gain a competitive advantage in the process plays a vital role, it can reduce the cost of purchasing the way to gain competitive advantage.Although the theory of fuzzy set has been advanced only several dozens years, it gets great achievement to the research of uncertainty question, and has been applied in various trades and occupations. In the management science domain, it often needs person's thought and the inference, thus the process has not precise, the non-quantification and the ambiguous phenomenon. We can solve these actual problems by well using the fuzzy set theory, therefore the fuzzy set theory has the great significance to the research of management science domain. Especially in the management policy-making question, choose the synergy inside the alternative collection, regarding"most superior"the concept may understand by a fuzzy concept, can carry on scientifically the arrangement and the choice to the action plan by using the fuzzy model.Based on the above, this paper conducts the research using the fuzzy set theory to a kind of enterprise's purchase decision-making question. This kind of enterprise is different with the common enterprise, its stock takes the quantity to be very small, thus may neglect the inventory cost question; its market provisioning has the homogeneity and same price, therefore does not need to consider supplier's choice question. Regarding to this kind of enterprise, what we need to key research is that how to choose appropriate purchase opportunity and the assignment purchase fund reduces the procurement cost, obtain the competitive advantage based on the productive plan and under the fund limit premise. This paper divides this kind of enterprise's shoppers into two types by profiting from the classify means of investment question, one kind for risk loathing shopper, the other kind for opportunity capture shopper. Under the foundation of purchasing the policy-making question to carry on the risk and the opportunity analysis, It constructs the risk loathing purchase decision model and the opportunity capture purchase decision model separately in view of these two type's shopper, and gives best purchase opportunity and the most superior fund allocation strategy in the purchase process, thus it has provided the detailed purchase decision-making basis for these two type's shopper. Finally in an enterprise's case, this paper calculates the best purchase opportunity and each kind of purchase commodity most superior fund allocation of this enterprise in a purchase decision-making time, and examines the validity and reliability of the model.