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ES Development Methodology (Turban) (Phase 1: Project Initialisation…
ES Development Methodology (Turban)
Turban (1993) identifies the following phases and sub-phases in the development of an expert system
This is probably a good account of the way knowledge engineering projects are currently organized in America
Phase 1: Project Initialisation
Problem definition
Needs assessment
Evaluation of alternative solutions
Verification that an ES approach is appropriate
Consideration of management issues
Notes: It's important to discover what problem/problems the client expects the system to solve for them and what their real needs are
The problem may very well be that more knowledge is needed in the organisation but there may be other better ways to provide it
'Management issues' include availability of finance, legal constraints and finding a champion in top management
Phase 2: System Analysis and Design
Perform a feasibility study
Perform a cost-benefit analysis
Decide sources of knowledge and ensure co-operation
Produce conceptual design
Decide development strategy
Select computer resources
Phase 3: Prototyping
Build prototype
Test, improve and expand it
Demonstrate and complete
Phase 4: System development
Build the knowledge base
Test, evaluate and improve the knowledge base
Plan for integration
Phase 5: Implementation
Ensure acceptance by users
Provide documentation
Arrange orientation and training for the users
Install, demonstrate and deploy the system
Phase 6: Post-implementation
Maintenance, upgrading and periodic evaluation