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perspective of development style it can be divided into top-down and bottom-up development methods; From the nature it can be divided into formal and non formal methods

management tools. 2.1 software development method software development method is a subject whose research object is software development method. From different angles

basic concept of object-oriented unified modeling language (UML) visual modeling object-oriented system analysis object-oriented system design.

architecture software architecture design method software architecture analysis and evaluation software middleware. 4) Object oriented system analysis and Design:

Technical knowledge of software components: components and their importance in information system projects common component standards (COM / DCOM / COM + CORBA and EJB).

tenance software reuse software quality assurance and quality evaluation software configuration management software development

government to citizen) G2C (government to citizen) 3) e-commerce B2B (business to business business to enterprise) B2C

knowledge portal (EKP) and Application Portal (EAP) 2) e-government G2G (government to government)

Supply chain management (SCM) business intelligence (BI) and enterprise portal (EP) can be divided into three categories: Information Portal (EIP)

engineering method information process and technology constitute the three elements of enterprise information system. 1.4 informatization foundation 1)

James Martin the first task for an enterprise to implement informatization is to plan its strategic data under the guidance of its strategic

Integration; 5) Data Management 1.3 information system construction the methods of information system construction mainly include: 1) business system planning (BSP)

System planning system analysis system design system implementation system operation and maintenance. Development law of information system (Nolan model): 1)

It is classified by application level including strategic level tactical level operational level and thing level.

system classification: classified by data environment it can be divided into data files application databases

A system that generates information through processing. Basic functions of information system: data collection and input data transmission information storage information processing information maintenance and information use. Information