Structured Planning: Functional Decomposition Diagrams

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Structured Planning Functional Decomposition
Diagrams
Process Modeling DFDs
Data Modeling ERDs
Structured Design Structure Charts
Logic Specification Decision rules within DFD
processes
Code Generation
A Central Repository
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• What you want in a Case Tool
• Good Diagramming Tools
• Consistency Checking Across Levels (i.e.within
  DFDs)
• Consistency Checking Across Tools (i. e. DFDs to
  ERDs)
• Automatic Generation of Diagrams (i.e. get ERD
  skeleton from DFD or vice versa)
• Code Generation

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• Why Organizations Adopt Case
• Provide new systems with shorter development
  time.
• Improve productivity of the SDLC process
• Improve the quality of the SDLC process
• Improve worker skills
• Improve portability of systems
• Improve management of SDLC

• Why Organizations Reject Case
• High cost of purchasing CASE
• High cost of training personnel
• Low organizational confidence in the IS
  department
• Lack of standard methods in the organization
• Viewing CASE as a threat to job security
• Lack of confidence in usefulness of CASE products