关键词: 钢铁企业, 成本分析, 工艺路线, 数据仓库, 维度建模, 数据挖据

Abstract: In cost analysis of iron & steel enterprise，analysis and control of consumption of the key process of process routes become primary task for iron & steel enterprises production cost decision-making.Through process routes as the breakthrough point，combining the cost analysis projects of enterprises，do data warehouse modeling for production cost processes.Adopting improved decision tree algorithm C4.5 used for production cost data，mine the key processes in process routes and the classification rules affecting the costs of iron & steel enterprises.It provides a scientific basis for the cost management for enterprises.

Key words: iron &, steel enterprises, cost analysis, process routes, data warehouse, dimensional modeling, data mining