MERISE is an Information System Design and Development methodology widely used in France.
The framework of MERISE has three cycles: abstraction cycle, approval cycle and life cycle.
The abstraction cycle uses the three database levels (conceptual, logical and physical).
The approval cycle recognizes the necessity of identifying decision points during the development of the information system.
The life cycle consists of (long range) planning, initial study, detailed study, implementation, launching and maintenance. A system of tools has been defined to support these cycles.
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