Atomic Design methodology provides the mental framework essential for successful pattern-based development. This systematic approach treats interfaces as both cohesive wholes and collections of component parts.
The five stages create hierarchy: Atoms (indivisible elements like buttons), Molecules (functional combinations like search forms), Organisms (standalone sections like headers), Templates (page structure without final content), and Pages (templates with real content).
Each component follows the single responsibility principle – doing one thing well. Molecules combine atoms for specific purposes, while organisms provide context for how molecules work together in larger sections.
This methodology isn’t linear – it’s a mental model for understanding how design systems work. Templates focus on content structure flexibility, while pages test the system’s effectiveness with real content across different contexts.