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The study logistics system , the fundamental goal is to reduce the total cost , because the inventory cost of the materials occupy a large proportion of the total cost of logistics activities . Therefore , the theories and methods of inventory control has a very important significance to reduce the total cost of logistics activities , which is the theoretical study of the logistics system in a hot issue . In recent decades, the traditional inventory control theory has made ??great progress in many aspects , but because of the inventory control system in which the complexity of the environment , and polygons, the results of the theoretical and practical application , there is a great gap between the . The inventory , research too idealistic assumptions , coupled with no give full consideration to the vendors in actual sales activities face many uncertainties , and other factors , makes research difficult to apply to actual . On the demand side , due to the high degree of actual market opening , customer demand fluctuations , most demand are uncertain demand , this text is in the random demand premise . In addition , most studies only limited to a single product , this paper studied a variety of product inventory strategy , in order to make research results more realistic . The theoretical basis for research , including a two-stage theory of inventory management , optimization theory . The research methods include: model analysis , data analysis , and comparative analysis . Firstly, multi-product inventory in the supply chain, inventory control and supply chain environment , a review of research at home and abroad in recent years , the scope of the study to determine the random demand multi-product inventory policy issues . Then detailed description of the supply chain and inventory basic theory , and from the form of expression , the source and response measures detailed analysis of the uncertainties in the supply chain , to explore the link between uncertainty and inventory . The main part of the article for the third, fourth , five chapters , from price discounts , product substitutability , and vendor-managed inventory (VMI) three studied random demand multi-product inventory strategy . Selected three research perspective is the vendors often considered real sales activities actual problem , it is a good guide for the actual sales activities .
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