| The businesses of PSI(Purchase Selling and Inventory)are insurance for the process of other businesses in clothing selling company.There are much basic data should be tackled in PSI business.The development of PSI information system can enhance data management level and business process efficiency.High efficiency of PSI business can guarantee businesses process in clothing selling company.PSI business of a certain clothing selling company in Henan province is selected as research target,to develop PSI information system which is applicable for businesses process in this company.Requirement investigation and requirement analysis is carried out based on modern software theory.Business processes of PSI are researched,business process models are established.PSI system users are divided into several participants,which include system manager,purchase manager,storage manager and etc.Functional requirements of every participant are analyzed,and UML use case analysis model is established for function requirements description.Functional features are summarized,and the system is divided into several relative independent modules.Data storage requirements of every functional module are analyzed,and database structure model is designed.Database model obey 3NF restriction,it can reduce data redundant and IO exception during system running process.The PSI system is divided into several layers,the realization aim of different layers is determined,coupling relation between different layers is determined too.According module division scheme,functions in every module are designed.Class model,sequences models are designed.Based on system design scheme,program code is accomplished,and software system is acquired.User interfaces for every function are designed;interfaces provide data access way for users and information system.PSI information system deploy in local LAN of clothing selling company,system running steadily,and enhanced PSI business efficiency of clothing selling company. |
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