Study On The Method Of The Determination Of Function-area Scale In The Logistics Center

With economic globalization and the accession to the World Trade Organization and the further development to deepen reform of China, the logistics is taken more and more people's attention and the logistical industry is also developing rapidly. Logistics center as an important vector of logistics operations, the research of the logistics center planning and management has attracted the concern of the industry experts. Logistics center is a flow-type node with logistics, information flow and capital flow and an important component to realize the modernization of Chinese logistical industry.Though the scientific management of the transportation, packaging, handling, distribution processing, distribution, information processing, Logistical center can reduce the labor intensity of operations, decrease product loss, improve inventory turns, speed up the circulation of commodities, decrease logistical cost and improve the satisfaction of social needs.Function-area is the basic unit of the logistics and every logistical operation is completed in the Function-area.The main objective of the function-area planning is to rationalize logistics operations, Smooth flow of goods, minimize the open cargo handling,so the excellent function-area planning can enables the construction costs of the logistics center and the costs of the logistics management and operations to reduce by at least 10% to 30%.The determination of function-area scale is an important part of the function-area planning and it will affect the planning and the future development of the logistics center.In a word,the rational function-area scale make the logistics center be more dominate and beneficial,so the logistics center will be in the lead.The paper initially researched the method of the determining the function-area scale with the function-area scale as the object.And hope the conclusion of the research is drawn lessons and instructions in the logistics center planning and design.The main content of the paper includes some aspects as follow:1. The basis theory on the logistics center inside planningAt first, the paper introduce the theory and the character of the logistics center, the division of the function-area and the logistical operation in every function-area;then elaborate the basis theory on the function-area planning;at last analyse the working processes in the logistics center and the operation timing,then expound the relation between the function-area scale and the operation in the logistics center.2. Define the factors to affect the function-area scale determinationDuring the logistics center function-area planning there are many factors to affect the function-area scale determination.In the paper divide the affective factors into the static impact factors and the dynamic impact factors.The static impact factors include the species and the size of the goods, the packing size, the annual average flow of goods, the pallet size, the real size of the facilities, the whole scale of the logistics center, the valid high, the ground load,the building cost and so on; the dynamic impact factors include the time of every operation,operating capacity per unit area, the quantity of the human in every operation and so on.Then quantitative the static impact factors and concrete the dynamic impact factors on the quening theory, so get every specific factor.3. The method of determining the function-area scale of the logistics center.At first, introduce the principle of time and space consumption, and improve this principle;then solve the time and space resource to need in every function-area of the logistics center by the improved principle of time and space;at last,according to the time and space resource of the goods establish the model to determine every function-area scale.4. Examples of the method on determining function-area scale. Based on XX logistics center, the method on determining function-area scale in the paper has been applied to determine the function-area scale in the new logistics center due to the development of XX logistics center.5. WITNESS-based simulation of logistics centerThe function-area scale has been used in fact by the simulation software WITNESS and analyzed the operating efficiency and space utilization, then verify the practicality of the method on determining the function-area scale.6. Summary and outlookSumming up the conclusions of the paper and propose future research.The novelty of this paper is mainly reflected in the following aspects:1. Divide the factors to affect function-area scale determination into the static impact factors and the dynamic impact factors. Quantitative the static impact factors and the dynamic impact factors on the mathematical method and the quening theory.2. Put the time and space resources the goods consumed in the logistics center into the matnematical model on the function-area scale determination, and determine the function-area scale from the random time remain and flow of the goods.3. Simulate the work processes of the function-area with the discrete event simulation software WITNESS, and verify the expediency and the practicality of the function-area scale determinated by the model.