Object-Role Modeling - Design Procedure

Design Procedure

The information system's life cycle typically involves several stages: feasibility study; requirements analysis; conceptual design of data and operations; logical design; external design; prototyping; internal design and implementation; testing and validation; and maintenance. ORM's conceptual schema design procedure (CSDP) focuses on the analysis and design of data. The seven steps of the conceptual schema design procedure are:

  1. Transform familiar information examples into elementary facts, and apply quality checks
  2. Draw the fact types, and apply a population check
  3. Check for entity types that should be combined, and note any arithmetic derivations
  4. Add uniqueness constraints, and check arity of fact types
  5. Add mandatory role constraints, and check for logical derivations
  6. Add value, set comparison and subtyping constraints
  7. Add other constraints and perform final checks

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