Abstract: Requirement analyzing is an important phrase of database design. Based on a full consideration of the user’s requirements, an analysis on the information related to the database is given. A requirement analysis of the Decision supporting system of passenger train, its data flow diagram, data dictionary and general design are formed which has laid a good foundation for the specific database designing and later system development.

Key words: Passenger train plan, Requirement analyzing, Data flow diagram, Data dictionary

摘要： 需求分析是数据库设计的重要阶段.在充分考虑用户需求的基础上分析了与
旅客列车数据库相关的信息，对旅客列车开行方案决策支持系统进行了数据库需求分析，形成了该系统的数据流程图和数据字典，并进行了相应的概要设计，从而为该系统的数据库设计乃至后面的系统开发打下了良好的基础.

关键词: 旅客列车开行方案, 需求分析, 数据流程图, 数据字典