Demand Information Sharing In Coal Supply Chain

The healthy and stable development of coal industry is of great significance to the national economy.Currently,the imbalance,inharmonious developing problems of the national coal industry are still outstanding,especially the problem of supply and demand.Poor information delivery is one of the reasons of the imbalanced supply and demand.Another reason is the poor coal supply chain effectiveness and capabilities itself.Compared with the coal supply chain structure abroad,ours is more complex.Asymmetric information,imbalanced production and demand that led to the significant bullwhip effect in coal supply chain.The core segment of solving the problems in the coal supply chain is information sharing.By sharing various kinds of information related to coal,we can acquire the operating status in the coal supply chain and thus it is much better to arrange the production,transportation and sale of the coal.It is of great significance to the stable operation and orderly development of the coal supply chain nodes.Information sharing is also a key link to achieve coal supply chain collaboration because it is the basis of coal supply chain logistics collaboration,capital flow coordination and information collaboration.Based on the significant importance of information sharing to the coal supply chain,this paper studied the information sharing evolution of the coal production enterprise that is the leader in the coal supply chain information sharing,value and information sharing efficiency evaluation of coal supply chain information sharing.The difference between information sharing in coal supply chain and the existing literature is considering the influence of seasonal variation of coal demand,the decision deviation and other factors.The main contributions of this paper are as follows:1.The third chapter analyzed the characteristic of the coal supply chain and information evolution of coal enterprise that plays a leading role of the information sharing in the coal supply chain.We set up an information sharing evolutionary game model for the coal enterprise.Through this game model analysis,we examined the effect of the factors that influence the evolutionary stabilization strategy such as the information sharing cost,coal production cost,transportation cost,inventory cost and information sharing strategy of competitors.The study found that(1)The relationship between information sharing cost,other cost and competition strategies affect the industry evolution direction of information sharing.(2)The initial proportion of information sharing will also affect the direction of information sharing and evolution in the whole industry.2.The fourth chapter studied the value of information sharing comprised by coal enterprise and coal demand enterprise.We analyzed the influence of coal demand,coal demand seasonality,decision deviation and lead time on the value of information sharing in coal supply chain.The cost change in coal supply chain was compared in three cases that are partial information sharing,complete information sharing and non information sharing.The main findings of this chapter are as follows:we found that the correlation degree of the coal demand seasonality,the fluctuation of the decision deviation and the range of lead time have impacts on the information sharing value of the coal supply chain.(1)The seasonality of the coal demand affect the coal supply chain information sharing value under some certain conditions.Based on the data analysis,we can infer that the seasonality of coal demand doesn't have significant influence on information sharing value in large coal supply chain in china.(2)The decision deviation has significant influence on the value of coal supply chain information sharing.Accurate decision deviation is beneficial to the coal supply chain;on the contrary,inaccurate information sharing would do harm to the coal supply chain.The greater the change of decision deviation is,the greater information sharing value is.(3)The lead time has an impact on the value of information sharing in the coal supply chain.The longer the lead time,the greater information sharing value is.(4)We found that as the correlation degree of coal demand is closer to 1,the greater information sharing value in coal supply chain can get.3.The study extended the model in fourth chapter and studied the three-level coal supply chain information sharing consisting of coal enterprise,coking coal enterprise and coal demand enterprise.The study focused on the influence of decision deviation,demand correlation degree on the cost of coal enterprise,coking coal enterprise and coal demand enterprise.We compared the cost change of coal enterprise,coking coal enterprise and coal demand enterprise under the situation of complete information sharing,partial information sharing and non information sharing and analyzed the influence of demand correlation,decision deviation and lead time on the information sharing value in the three-level coal supply chain.According to study,the results are as follows:(1)The information sharing value of coking coal enterprise is influenced by the correlation degree of coal demand,the fluctuation of coal demand,lead time and decision deviation.The information sharing value of coking coal enterprise increases with the correlation degree,the greater the correlation degree,the greater value of information sharing is.The greater fluctuation of coal demand,the greater value of information is.The greater fluctuation of decision deviation,the greater value of information sharing is.The longer the lead time,the greater value of information sharing is.(2)The information sharing value of coal enterprises has relationship with the coal demand,lead-time and the variation of the decision deviation.The greater the correlation degree of coal demand,the greater value of information sharing is.The longer the lead time,the greater value of information sharing is.The greater the decision deviation,the greater the reduction of average inventory level after information sharing.4.Based on the theory of information ecology,we designed the coal supply chain information sharing efficiency evaluation index system.Using DEA fuzzy evaluation method to evaluate efficiency of information sharing,according to the evaluation results,we presented the improvement measures in various confidence levels of the non DEA effective coal supply chain.In the end,based on Malmquist index,we established the information sharing evaluation index which can do dynamic evaluation of the efficiency for information sharing in coal supply chain.