Entity Relationship Diagram is defined as

Entity Relationship Diagram is defined as

• A. A graphical description of the data model showing how data entities relate to one another
• B. A diagram of patient flow in a clinic
• C. A chart of workflow steps
• D. A schematic of hardware components used in the system

Answer: (B)

An entity-relationship diagram is a graphical description of the data model that shows how data entities relate to one another. It focuses on the structure of the data: entities (such as Patient, Appointment, or Medication), their attributes (like patient name, date, dosage), and the relationships between those entities (for example, a patient can have many appointments, each appointment belongs to one patient). ERDs often include keys and cardinalities to define how data elements connect and how many instances of one entity relate to another. This helps in database design and ensures data integrity by making clear how information is connected. This isn’t a diagram of patient flow through a clinic, nor a step-by-step workflow map, nor a schematic of hardware components. Those other diagrams illustrate processes or physical components, not the organization and relationships of data in a system.

An entity-relationship diagram is a graphical description of the data model that shows how data entities relate to one another. It focuses on the structure of the data: entities (such as Patient, Appointment, or Medication), their attributes (like patient name, date, dosage), and the relationships between those entities (for example, a patient can have many appointments, each appointment belongs to one patient). ERDs often include keys and cardinalities to define how data elements connect and how many instances of one entity relate to another. This helps in database design and ensures data integrity by making clear how information is connected.

This isn’t a diagram of patient flow through a clinic, nor a step-by-step workflow map, nor a schematic of hardware components. Those other diagrams illustrate processes or physical components, not the organization and relationships of data in a system.