APPENDIX

System Architecture

The two features

The following two points were regarded as important for development of the system architecture.

1.Securing of flexibility under changing social needs and technology advancements;2.Securing of interoperability and interconnectivity with the advanced information and telecommunication society

Measures taken for actualization of the two features

The following measures were taken to reflect the two features in the process to develop the system architecture.

1.The use of Object-oriented analysis method, which allow easier changes and additions to parts of the system

Features
Structured analysis method
  • This method is well-established and has proved very useful.
  • The method analyzes and organizes the "functions"described along with the definition of each user service.
  • Modification of functions requires complicated and time-consuming processes.
    • Object-oriented analysis method
  • This is an improved and developed version of the structured analysis method.
  • The system is represented using "objects",which is a combination of "functions"and the "information"it handles.
  • The method facilitates modification and expansion.

    • The establishment of new user services to enable coordination between ITS and society
    Conceptual image:Areas to be harmonized with ITS and user services
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