Most change initiatives fail not because the change was wrong but because the implementation ignored how people actually respond to change. The technical design of the new process, system, or structure is rarely the problem. The problem is that the people who must work differently have not been brought through the psychological and behavioral journey that successful adoption requires. Change management models exist to structure that journey. This guide explains the three most influential ones and how to choose between them.
Change management is the structured approach to transitioning individuals, teams, and organizations from a current state to a desired future state. It addresses the human dimension of change: the resistance, uncertainty, capability gaps, and cultural dynamics that determine whether technically sound changes are actually adopted in practice or quietly undermined until they wither.
Kotter’s 8-Step Model, the ADKAR Model, and Lewin’s Change Model are the three frameworks most widely used by practitioners globally. Each has a distinct theoretical foundation, a different unit of focus, and different practical strengths. Understanding all three, and knowing when each is most appropriate, is the foundation of professional change management practice.
Key Takeaways
Lewin’s three-stage model (Unfreeze, Change, Refreeze) provides the conceptual foundation. Kotter’s 8-Step Model is the most widely used organizational change framework, operating at the level of the whole organization. Prosci’s ADKAR Model operates at the individual level and is the most practically useful for diagnosing where specific change adoption is breaking down. In practice, experienced change practitioners draw on all three rather than applying a single model exclusively. All three models are consistent on one point: underestimating the people dimension of change is the primary cause of change failure.
of organizational change initiatives fail to achieve their intended objectives (McKinsey)
spent globally on change and transformation programs annually, with the majority of value unrealized
higher success rate for change initiatives with excellent change management versus poor change management (Prosci)
Lewin’s Change Model: The Foundation
Kurt Lewin developed his three-stage change model in the 1940s, and it remains the conceptual foundation on which most subsequent change management theory is built. Despite its age and simplicity, it captures something fundamental about how change works at both the psychological and organizational level.
Stage 1: Unfreeze
Create the conditions for change by disrupting the current equilibrium. People and organizations are in a state of equilibrium maintained by forces that resist change. Unfreezing requires increasing the forces driving change (demonstrating the urgency or necessity) and reducing the restraining forces (addressing the fears, habits, and vested interests that maintain the status quo). Without genuine unfreezing, change initiatives meet the organizational equivalent of a body rejecting a transplant.
Stage 2: Change (Transition)
Navigate the transition from the old state to the new state. This is the most uncertain and uncomfortable phase, characterized by learning new behaviors, making mistakes, and not yet having the competence or confidence that comes with established practice. Lewin recognized that this phase requires active leadership support: people in transition need direction, reassurance, and permission to be imperfect while learning.
Stage 3: Refreeze
Stabilize the new state by anchoring the change in organizational norms, systems, structures, and culture. Without deliberate refreezing, organizations regress to old behaviors when leadership attention moves elsewhere. Refreezing requires aligning performance metrics, incentives, processes, and cultural norms with the new way of working. Change that is not refrozen is not permanent.
When Lewin’s model is most useful: As a diagnostic and conceptual framework. It helps change leaders identify which phase they are actually in and what the primary challenge of that phase requires. It is too high-level to serve as a practical implementation guide but invaluable for understanding why a change initiative is encountering resistance.
Kotter’s 8-Step Model: The Organizational Framework
John Kotter developed his 8-Step Model based on research into why large-scale organizational change succeeds or fails. Originally published in 1996 and updated in 2014, it remains the most widely cited organizational change framework globally. It operates at the level of the organization or business unit, providing a sequential process for leading large-scale change.
Create a Sense of Urgency
Establish why change is necessary and why now. Kotter argues that most change initiatives fail at this stage: leaders who believe the need for change is obvious underestimate how much others need to feel the urgency themselves rather than simply be told about it. The urgency must be genuine and communicated through evidence, stories, and direct experience, not through corporate communications alone.
Build a Guiding Coalition
Assemble a group with enough power, credibility, and commitment to lead the change. The guiding coalition must include formal leaders with organizational authority and informal influencers whose endorsement shapes what colleagues believe is real and important. A change initiative driven by the change management function alone, without visible senior leader commitment, lacks the organizational authority to overcome serious resistance.
Form a Strategic Vision and Initiatives
Develop a clear, compelling picture of what the future state looks like and how to get there. The vision must be specific enough to guide decision-making and simple enough to be communicated in under two minutes. A change vision that requires a 40-slide deck to explain has not yet been formed into a vision; it is still a strategy document.
Enlist a Volunteer Army
Build broad-based energy and momentum for the change by engaging people beyond the guiding coalition. Large-scale change requires large numbers of people who understand the vision, believe in it, and are actively working to realize it. The updated 2014 version of Kotter’s model emphasizes network-based change leadership alongside formal hierarchy, reflecting the reality that organizational change happens through informal networks as much as formal structures.
Enable Action by Removing Barriers
Identify and remove the structural, process, and cultural obstacles that prevent people from acting in the new way. Barriers include managers who resist change, systems that reward old behaviors, and skills gaps that make the new way impractical. Removing barriers requires the organizational authority that only senior leaders can exercise.
Generate Short-Term Wins
Create visible, unambiguous successes early in the change process. Short-term wins demonstrate that the change is working, reward early adopters, undermine resisters, and maintain momentum during the long, difficult middle of a major change initiative. Change programs that show no results for 18 months lose organizational support regardless of their ultimate merits.
Sustain Acceleration
Use the credibility from early wins to drive further change rather than declaring victory prematurely. Kotter identifies premature declaration of victory as one of the most common failure modes in large-scale change: organizations relax the change effort at exactly the point when sustained pressure is needed to achieve the remaining, often harder, elements of the transformation.
Institute Change
Anchor the change permanently in organizational culture, processes, and systems. This step corresponds to Lewin’s refreezing. New behaviors must be connected to organizational success in ways that are visible, and the connection must be narrated explicitly: this is how we do things now, and these are the results it has produced. Leadership succession planning must also consider whether successor leaders will continue the change or revert to previous approaches.
When Kotter’s model is most useful: Large-scale organizational transformation: restructuring, strategy shifts, cultural change, and major technology implementations. It is a leadership and organizational model, not a project management framework. It is less useful for smaller, more localized changes where the full eight-step sequence would be disproportionate.
The ADKAR Model: The Individual Framework
Developed by Prosci founder Jeff Hiatt, ADKAR is an acronym describing the five outcomes an individual must achieve to successfully adopt and sustain a change. It operates at the individual level, making it the most practically useful model for diagnosing where specific change adoption is failing and designing targeted interventions to address it.
| Element | What It Means | If This Is Missing | How to Build It |
|---|---|---|---|
| Awareness | Understanding why the change is necessary and what happens if it does not occur | The person does not understand the need for change and sees no reason to move from their current state | Clear, honest communication about the business case for change; transparent sharing of the risk of not changing |
| Desire | Personal motivation to support and participate in the change | The person understands the change but does not want to change; may be actively resistant or passively non-compliant | Understanding individual concerns; addressing WIIFM (what is in it for me); engaging managers to demonstrate support; addressing specific fears |
| Knowledge | Knowing how to change: the skills, behaviors, and processes required in the new state | The person wants to change but does not know how; training gaps create capability barriers to adoption | Training, coaching, job aids, and peer support that build the specific skills required for the new way of working |
| Ability | The demonstrated capability to implement the change in practice | The person has been trained but cannot yet perform the new behaviors consistently in real work conditions | Practice opportunities, coaching through performance gaps, process support, and feedback during the learning curve |
| Reinforcement | Sustained adoption of the change over time | Early adoption exists but the person reverts to old behaviors when the change initiative loses momentum or attention | Recognition and incentives for sustained new behavior; accountability systems; addressing root causes of regression |
ADKAR’s most powerful application is as a diagnostic tool. When a change initiative is not producing the adoption results expected, ADKAR provides a structured approach to identifying where in the individual adoption journey the barrier lies. Training more people who already have Knowledge but lack Desire is wasted investment. Communicating the case for change to people who already have Awareness and Desire but lack Ability is similarly misdirected. The model forces precise diagnosis before intervention design.
When ADKAR is most useful: Diagnosing and addressing adoption gaps in any change initiative. It works alongside Kotter (which tells you what to do organizationally) to address the individual dimension that Kotter’s model does not fully detail. It is particularly useful for middle managers who are responsible for their teams’ adoption of a change being driven from above.
Choosing Between the Models
| If you need to… | Use this model | Why |
|---|---|---|
| Conceptually understand why your change initiative is encountering resistance | Lewin | The three-stage framework diagnoses whether you are in an unfreezing, transition, or refreezing challenge |
| Lead a large-scale organizational transformation with a senior leadership team | Kotter | Provides the full organizational leadership sequence for major change; addresses culture, coalition, and momentum |
| Diagnose why specific individuals or teams are not adopting a change | ADKAR | Individual-level diagnostic precision; identifies the specific barrier to adoption and the targeted intervention required |
| Design a complete change management program for a significant organizational change | All three, integrated | Lewin provides the conceptual foundation; Kotter structures the organizational leadership activities; ADKAR addresses individual adoption |
What Practitioners Get Wrong About All Three Models
Treating the model as the plan: Change management models describe what needs to happen, not how to make it happen in your specific organizational context. A Kotter step chart or ADKAR assessment instrument is a framework for thinking, not a project plan. The judgment, relationship, and communication skills required to actually execute change are not contained in any model.
Skipping steps because the timeline is short: Kotter’s most common misapplication is compressing or skipping the urgency-building and coalition-formation steps because the project plan has already set an implementation date. These steps cannot be skipped without consequences; they can only be done badly and then paid for in resistance and failed adoption later.
Using ADKAR as a checkbox exercise: ADKAR assessments that are conducted as surveys rather than conversations, or used to label resisters rather than understand and address their concerns, miss the diagnostic value of the model entirely. The model is a conversation framework, not a classification system.
Effective change management depends on the quality of communication throughout every phase. The leadership communication capabilities that enable change leaders to create urgency, build coalitions, and sustain commitment through resistance are covered in our guide on enhancing leadership communication. Major organizational change almost always requires cross-functional leadership without formal authority, covered in our guide on cross-functional team leadership. The organizational capability to manage change alongside disruptive external pressure is covered in our guide on disruptive innovation. The collaboration disciplines that change programs depend on are covered in our guide on cross-functional collaboration.
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Frequently Asked Questions
Which change management model is best?
There is no single best model. The right framework depends on the scope and nature of the change, the organizational context, and what question you are trying to answer. Lewin is best for conceptual diagnosis. Kotter is best for large-scale organizational transformation leadership. ADKAR is best for individual adoption diagnosis and targeted intervention. Most experienced practitioners use elements of all three. Selecting one model and ignoring the others reduces your diagnostic toolkit without improving your results.
How long does organizational change take?
Kotter’s research found that major organizational transformations typically require three to five years to fully complete, including the cultural embedding phase. Technology implementations and process changes can be completed faster, but behavioral and cultural change follows a longer timeline regardless of how quickly systems and structures change. Organizations that expect full behavioral adoption within six months of a major change are setting themselves up to declare premature victory.
What is resistance to change and how should it be managed?
Resistance to change is a normal, predictable human response to disruption of established patterns, not evidence of dysfunction or poor attitude. ADKAR analysis typically reveals that resistance is rooted in a specific missing element: lack of awareness of why change is needed, insufficient desire because concerns have not been addressed, knowledge or ability gaps that make the new way feel impossible, or insufficient reinforcement that makes reverting feel safe. Managing resistance requires diagnosing its root cause and designing targeted responses rather than applying generic communication campaigns to all resisters equally.
What is the role of middle managers in change management?
Middle managers are the most critical and most neglected group in most organizational change initiatives. They are responsible for translating organizational change into team-level behavior, which requires them to be simultaneously change recipients (managing their own response to change) and change leaders (supporting their teams through it). ADKAR is particularly useful for equipping middle managers to have individual adoption conversations with their direct reports. Change initiatives that invest in middle manager capability see significantly higher adoption rates than those that communicate to the top and bottom of the organization while skipping the middle.
How do Agile and change management relate?
Agile delivery methodologies and change management frameworks address different dimensions of organizational change. Agile provides the delivery framework for how change is built and deployed: iteratively, with frequent feedback. Change management provides the people framework for how change is adopted: building awareness, desire, knowledge, and ability in those affected. The most effective large-scale transformation programs integrate both: Agile for delivery agility and change management for adoption. Treating Agile adoption as a replacement for change management is a common mistake that produces technically delivered change that is not actually used.
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This Article is Reviewed and Fact Checked by Ann Sarah Mathews
Ann Sarah Mathews is a Key Account Manager and Training Consultant at Rcademy, with a strong background in financial operations, academic administration, and client management. She writes on topics such as finance fundamentals, education workflows, and process optimization, drawing from her experience at organizations like RBS, Edmatters, and Rcademy.