| The car,an invention that leads the civilization of human beings,it has changed the way of human travel,expanded the range of human travel,shortened the time of human travel,and promoted social progress and development.Especially in China,the development of the automobile industry has been jumping forward in the past decade,Production and sales reached 24 million in 2015 from 3 million in 2000,and became the global champion of automobile production and sales.But the hidden dangers will not be underestimated.In recent years,the growth of China’s auto industry has slowed down gradually,but there are still more and more international brands staring at the cake in China market.Every year,different automobile manufacturers enter the Chinese market to build factories,produce brands that cannot be branded,and their own brands are also vigorously developing their production capacity,and all kinds of new models are coming up like mushrooms.The manufacturers vigorously expand at the same time,in recent years some domestic brand dealers miserable,manufacturers Yahuo,high inventory operation,capital chain rupture,collapse,loss of a few,the danger of excess capacity has emerged,if we do not regulate and control,allowing manufacturers to blindly produce and expand their capacity will bring serious waste of resources and even shake the economic foundation of the society.Therefore,we need a reasonable sales forecasting model to balance the contradiction between market demand and overcapacity.The company over the years Changan Wanyou brand sales Xiangyu data as the foundation,to fully assess the various external factors that influence the sales of the brand,establish the brand car sales forecast model,provide a production plan for the manufacturers to provide the basis for the purchase plan of dealers,aims to promote the healthy and reasonable management of car dealers,which prompted the Changan brand in the the healthy development of the regional distributors.Based on the prediction model based on data change trend,the grey prediction model and BP neural network models are established,validity analysis and forecast model of Chengdu area and the Wanyou automobile company Changan Xiangyu brand car sales.Based on the influence factors of the prediction model,and analyses the impact of various factors of brand car sales in the local area,and fully analyzes the reasonable and effective of these factors,the car sales is mainly affected by the economic environment,price,etc.series of factors,and then through the grey correlation analysis to calculate the impact of various factors on the car sales.After standardization of these indexes,the sales volume is predicted as the input value of the grey neural network.The average relative error of the forecast results is 2.5%.Finally,the accuracy of each model is compared and analyzed,and the accuracy of the grey neural network is the highest.The grey neural network model is used to predict the future sales data,which provides the reference data for the manufacturers and dealers to promote the healthy development of production and marketing... |