Lewin's Change Model
Also known as: Unfreeze-Change-Refreeze, Lewin's Three-Stage Model
A foundational change management model with three stages — Unfreeze (prepare for change), Change (implement the transition), and Refreeze (stabilize the new state) — providing a simple framework for understanding any change process.
Quick Reference
Memory Aid
Ice cube: Melt it (Unfreeze), reshape it (Change), freeze it again (Refreeze).
TL;DR
Every change has three phases: Unfreeze the status quo (create readiness), implement the Change (new behaviors), Refreeze the new state (embed in systems). Most failures come from skipping Unfreeze or Refreeze.
What Is Lewin's Change Model?
Think of change like reshaping an ice cube: you must first melt it (Unfreeze — disrupt the status quo), then pour it into a new mold (Change — implement the new way), and finally freeze it again (Refreeze — stabilize the new state so it sticks).
If you want truly to understand something, try to change it.
— Kurt Lewin
Lewin's model is based on the concept of a 'quasi-stationary equilibrium' — the idea that human behavior is held in place by driving forces (pushing for change) and restraining forces (resisting change). Unfreezing disrupts the equilibrium by strengthening driving forces or weakening restraining forces. The Change stage moves the system to a new equilibrium. Refreezing stabilizes the new equilibrium by establishing new norms, systems, and structures. Though simple, this model remains profoundly insightful — most change failures occur because organizations skip Unfreezing or Refreezing.
Lewin's Three Stages
Like reshaping an ice cube: melt it (Unfreeze), reshape it (Change), freeze it again (Refreeze).
Unfreeze
Create readiness for change
Change
Implement new ways
Refreeze
Stabilize the new state
Origin & Context
Lewin, a social psychologist, published the model in 'Frontiers in Group Dynamics.' His work on group dynamics and field theory laid the foundation for organizational development and change management as a discipline.
Core Components
Unfreeze
Prepare the organization for change by disrupting the status quo and creating readiness.
Example
Sharing customer complaint data, competitive benchmarks, or financial projections that make the case for change undeniable.
Change
Implement the new processes, structures, behaviors, or technologies.
Example
Rolling out new work processes, providing training, coaching through the transition, and adjusting as needed.
Refreeze
Stabilize the new state by embedding it in organizational systems and culture.
Example
Updating job descriptions, adjusting KPIs, changing reward structures, and celebrating the new normal.
Lewin was also the pioneer of 'action research' — the idea that you should study social systems by trying to change them. His three-step model, published in 1947, remains the foundational theory underlying virtually every subsequent change management framework. He died just months after publishing it, at age 56.
When to Use Lewin's Change Model
Understanding why changes don't stick
Problem it solves: Most change failures come from insufficient Unfreezing or Refreezing.
Real-World Application
A company implemented agile development but saw teams revert to waterfall within six months. Analysis showed they had done the Change (training, new tools) but skipped Unfreezing (people didn't understand why agile was needed) and Refreezing (performance metrics still rewarded waterfall behaviors).
Planning any change initiative
Problem it solves: Provides a simple mental model for ensuring all three phases are addressed.
Real-World Application
A hospital planning a patient safety initiative used Lewin to structure their approach: Unfreeze (share error data to create urgency), Change (implement new protocols), Refreeze (embed in quality metrics and accreditation).
In today's fast-changing world, some argue that 'Refreezing' is outdated because organizations need to stay fluid. But Lewin's point remains valid: without some stabilization, people revert to old habits.
How to Apply Lewin's Change Model: Step by Step
Before You Start
- →A defined change initiative
- →Understanding of the current state and desired future state
- →Stakeholder analysis
Unfreeze
Create readiness by establishing urgency, challenging the status quo, and reducing resistance.
Tips
- ✓Conduct a Force Field Analysis to identify driving and restraining forces
Common Mistakes
- ✗Jumping to Change without adequately Unfreezing
Change
Implement the transition — new processes, behaviors, or structures.
Tips
- ✓Expect messiness and resistance during this phase — it's normal
Common Mistakes
- ✗Expecting the transition to be smooth and linear
Refreeze
Stabilize the new state by embedding it in organizational systems.
Tips
- ✓Update every system that touches the change: HR, IT, operations, rewards
Common Mistakes
- ✗Declaring victory without Refreezing — this is why changes revert
Value & Outcomes
Primary Benefit
Provides the simplest and most fundamental mental model for understanding any change process.
Additional Benefits
- ✓Highlights the commonly neglected phases (Unfreeze and Refreeze)
- ✓Applicable to change of any scale or type
What You'll Learn
- →How to prepare an organization for change through Unfreezing
- →How to stabilize change through Refreezing
Typical Outcomes
Best Practices
📋 Preparation
- •Conduct a Force Field Analysis during Unfreezing
- •Assess readiness for change across stakeholder groups
🚀 Execution
- •Invest as much effort in Unfreezing and Refreezing as in the Change itself
- •Communicate continuously through all three phases
🔄 Follow-Up
- •Monitor for regression after Refreezing
- •Build feedback mechanisms to detect early signs of reversion
💎 Pro Tips
- •Force Field Analysis is Lewin's companion tool — use it during Unfreezing to identify which restraining forces to weaken
Netflix's Culture Reinvention
Netflix's shift from DVD-by-mail to streaming (2007-2012) is a textbook Lewin's model application. Unfreeze: CEO Reed Hastings shared internal data showing streaming would dominate within 5 years, making the DVD business model obsolete. Change: The company invested massively in streaming technology, content licensing, and original programming. Refreeze: Netflix reorganized around streaming, hired streaming-native talent, and let the DVD division operate separately.
Limitations & Pitfalls
Oversimplifies complex organizational change into three stages
Mitigation: Use as a mental model and supplement with more detailed frameworks like Kotter's 8 Steps
Refreezing implies a new static state — not ideal for continuous change environments
Mitigation: Think of Refreezing as 'stabilizing the new minimum standard' rather than 'stopping all change'
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