---
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]]