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wiki/concepts/Randomization.md

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+---
+title: "Randomization"
+type: concept
+tags: [statistics, experimentation]
+sources: [project-management-experiment-tracker]
+last_updated: 2026-04-20
+---
+
+## Definition
+Randomization is the assignment of units to experimental variants by chance to reduce bias and support causal inference.
+
+## Core Principles
+- Randomly assign at the correct unit level
+- Keep assignment stable during the experiment
+- Avoid contamination between variants
+- Validate balance across key segments
+
+## Related Concepts
+- [[A/B Testing]]
+- [[Hypothesis Testing]]
+
+## Related Entities
+- [[Experiment Tracker]]
+