The Analysis And Design Of The Power Supply Section Management Information System

This thesis mainly introduces the analysis and design of PSSMIS(the Power Supply Section Management Information System). Firstly, the selection of technologies and approaches are discussed briefly. The feasibility study of this project and the method and process of structured system analysis are introduced in succession. The primary content of requirement investigation and the function requirements are presented. Partial operations in this field are described using operation flow diagram and the process of disassembling and analysis of this system is described using layered DFD(data flow diagram).This thesis also introduces the method and process of the summary design of this system, especially the transform from DFD to software structure diagram. Approaches for several important functions and the technology of data transfer are presented . The network scheme of power supply section , the hardware and software environment of this system and the database access mode are introduced briefly. Besides, it discuss the method of GIS and multimedia for pushing to deal with an emergency , aimed at the approach of video data management. The idea of video database is brought in the management of the video data in this system, and the segmentation and indexing are implemented using simple method .Moreover, the author introduces each step of the design of database , actual implementation of those steps and the conversion from previous step to next step, making use of the component-relationship diagram provided by a CASE tool PlayCASE.Finally the coding rules, the building of every code table and the way using the code was introduced. The code deal with equipments, departments and railways. Every thing possible is considered when the author establishes the coding rules , and the code can be extended and modified easily. The code tables of departments and railways are managed separately by each department, so that, when the code of a department is changed the code of another department need not be changed.