Business rules often change more frequently than UI or database structure.
Mixing them elsewhere makes updates risky and slow.
A dedicated layer helps control complexity.
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Business rules often change more frequently than UI or database structure.
Mixing them elsewhere makes updates risky and slow.
A dedicated layer helps control complexity.
The Service layer owns validation, calculations, and core decision logic.
It orchestrates workflows without worrying about UI or database specifics.
This makes business behavior reusable across controllers, triggers, and batch jobs.
This approach is central to business-logic isolation.