Definition
Entity Relationship Diagram (ERD) is a component of the Salesforce platform related to Core CRM. It encapsulates a specific piece of functionality or data architecture that supports business processes and system behavior.
Real-World Example
At their company, a CRM manager at Summit Group leverages Entity Relationship Diagram (ERD) to centralize important business data in one place. With Entity Relationship Diagram (ERD) configured to match their workflow, the team can quickly find relevant information, track changes over time, and generate reports that drive strategic decisions.
Why Entity Relationship Diagram (ERD) Matters
An Entity Relationship Diagram (ERD) is a visual representation of how objects (entities) in Salesforce relate to one another through lookup and master-detail relationships. ERDs are essential planning tools for architects and admins because they provide a clear, at-a-glance view of the data model, showing which objects exist, what fields connect them, and how data flows between them. Without an ERD, teams working on complex implementations often make redundant objects, miss critical relationships, or create circular dependencies.
As Salesforce orgs grow from a handful of objects to hundreds, ERDs become indispensable for onboarding new team members, planning migrations, and evaluating the impact of changes. A change to one object's relationship can cascade across the entire data model, and without an up-to-date ERD, teams cannot predict these impacts. Organizations that maintain current ERDs make faster, more confident decisions when adding features, integrating external systems, or refactoring their data architecture.
How Organizations Use Entity Relationship Diagram (ERD)
- Summit Consulting Group — Before building a new customer success module, Summit Consulting Group's architect draws an ERD showing how the new Customer_Health__c object connects to Account, Opportunity, Case, and a new Survey_Response__c object. The diagram reveals that they need a junction object for the many-to-many relationship between Health scores and Products, preventing a design flaw before any code is written.
- Atlas Financial — Atlas Financial maintains a living ERD in Lucidchart that automatically updates when custom objects are added. When the compliance team asks about the relationship between Trade records and Client Accounts, the team can instantly show the chain of relationships and identify which fields control data visibility through master-detail cascading.
- Greenfield University — Greenfield University uses ERDs during their annual data architecture review. The diagram shows 120 custom objects, and by visually scanning the ERD, the architect identifies 15 orphaned objects with no relationships to any other entity, flagging them for potential retirement and freeing up custom object count toward the governor limit.