Interview Questions for Business Analysts and Systems Analysts

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INTERVIEW QUESTION:

What information should be included in a logical data model?

Posted by Chris Adams

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Categories: Business Analysis, Systems Analysis, Domain Modeling, Data Analysis & Modeling

ANSWER

A logical data model is a graphical representation of data that is created or used by the organization, and associated rules governing the structure and relationships of that data. The logical model should use business names (following any established enterprise data or naming standards), and should be independent of any technology or physical design considerations. It typically includes the following information:

Entities (“tables”)

Relationships between entities

Cardinality – the numeric relationship between occurrences of two related entities

Attributes (“fields”) that are relevant to the project. (The logical data model does not include details such as data-types or foreign keys, since those are physical design considerations.)

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Sandy Lambert
Business Architect
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