Abstract
The trend of producing databases which do not satisfy organizational requirements can be attributed to the fact that the database designer is required to simultaneously consider many design constraints and does not have a comprehensive methodology to follow. A new decomposition of the logical database design process in which each level satisfies a single design objective is developed. In this decomposition, the requirements process and logical database design process are integrated to ensure that organizational requirements are satisfied. A structured logical database design methodology called LDDM that is based on this decomposition has been developed. LDDM consists of six design steps: Requirements Step, Entity Step, Relationship Step, Entity Structure Step, Refinement Step and DBMS Accommodation Step. LDDM including its constituent steps and techniques is presented. The utilization of LDDM will result in increased designer productivity, better documentation and a high quality logical database.
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