Organizational change management

In plain terms

Every change in an organization has two halves. One is the change itself: the new system, structure, process or strategy. The other is the people who have to work differently because of it. Organizational change management is the discipline that works on the second half.

In practice, OCM means things like working out who is affected and how, explaining the change in terms that matter to them, preparing managers to lead it, training people, hearing and acting on problems, and checking whether the new way of working has actually taken hold.

The word "management" can mislead. Several of the studies on this page are about involving people in a change, through realistic communication, dialogue or leaders acting as learning facilitators, rather than about managing them.

Where it came from

Roots in organizational development. OCM has roots in organizational development, the older field associated with Kurt Lewin's work on groups and change, though how closely the two are related is disputed (see below). Cummings, Bridgman and Brown (2016) argue that Lewin never developed the unfreeze, change, refreeze model himself, that it took form after his death, and they trace how it came to be seen as the foundation of change management. See Kurt Lewin.

Models for leaders. John Kotter's 1995 Harvard Business Review article on why transformation efforts fail, and his 1996 book, gave leaders a staged sequence for leading change, set out as eight stages in the book (Kotter, 1995, 1996). See Kotter's 8-step change model.

A profession. Prosci's methodology has three main components, the PCT Model, the ADKAR Model and the 3-Phase Process, which it describes as a process for achieving change at the organizational level (Prosci, n.d.). The Association of Change Management Professionals publishes a Standard for Change Management and offers the CCMP credential based on it (ACMP, n.d.). See change management certification for an independent guide to the credentials.

OCM and OD. The two are not the same, and the line is disputed. W. Warner Burke has argued that OD rests on a distinct theory and set of values that change management lacks (Burke, 2021). That is one author's position.

How it works

One practical way to see the ground OCM covers, whatever a given method calls the steps:

• Understand the change and who it affects. What changes, for whom, and how much.
• Build the case and the coalition. Why the change matters, and who above and around the people affected must back it.
• Prepare and equip people. Communication, training and coaching, including for the managers who lead the change in their teams.
• Listen and adjust. Ways for problems to travel back to the people who can fix them.
• Reinforce and sustain. Checking whether the new way of working is in use and holding.

See the change management process for how the main models break these into steps, and change management models compared for the models side by side.

What the research says

Most of the studies used here are correlational or case-based, and none of the sources on this page tests a named OCM model head to head.

Named models are used loosely. A systematic review of 38 studies applying change management models in health care found Kotter's model (19 studies) and Lewin's (11) the most used, often as guiding principles rather than applied step by step (Harrison et al., 2021, rated Medium from its abstract).

How change is run matters. A systematic review of 10 papers covering 292 cases of health care transformation found broad support that dialogic change practice, the strand of OD described in what is organizational development, went with a higher likelihood of successful transformation (Hastings, 2025, rated Medium from its abstract). The cases were reports, not controlled tests.

Reasons programs fail. A review of studies from 1980 to 2011 attributed failed change programs to insufficient education and training, employee apathy, inadequate management support, poor leadership, an inappropriate culture, inadequate resources, poor communication, inappropriate planning, insufficient customer focus and the lack of a monitoring and measurement system (Mosadeghrad & Ansarian, 2014, rated Medium from its abstract).

Leadership goes with how people react. Across 30 studies and 12,240 participants, transformational leadership was positively correlated with commitment, openness and readiness for change and negatively correlated with resistance and cynicism (Peng et al., 2021, rated Medium from its abstract). See transformational vs. transactional leadership.

Trust in management. A systematic review of 20 mostly cross-sectional studies found that trust in management and cognitive flexibility were the only factors correlated with all three dimensions of resistance, behavioral, cognitive and affective (Deng et al., 2023, rated Medium after a full-text read). See resistance to change.

People differ too. A meta-analysis of 168 samples found that a positive self-concept and tolerance for risk both correlated with better responses to change, with self-concept the stronger correlate of job attitudes and change responses (Gonzalez et al., 2023, rated Medium after a full-text read).

Two examples of OCM in studies.

• After a merger announcement, employees at one plant received a realistic merger preview, a program of realistic communication, and employees at another received limited information. The plant that received the preview showed fewer harmful outcomes of the merger, and the difference lasted through the study (Schweiger & DeNisi, 1991, rated Medium from its abstract). It is one organization and two plants, so the comparison cannot rule out other differences between them.
• In a LEGO department of about 100 staff, compared with a control department of about 50, lean problem solving with leaders acting as learning facilitators went with larger gains in survey-rated learning organization dimensions, efficiency and quality over 18 months (Kristensen et al., 2022, rated Medium after a full-text read). The departments were not randomized.

A cautionary example. In a qualitative case study of Nokia from 2005 to 2010, the researchers reported that middle managers who feared their superiors and peers shared less bad news upward, while top managers did not fully reveal how serious the outside threat was, and that top managers grew overly optimistic and the smartphone effort suffered (Vuori & Huy, 2016, an Atlas study rated medium, from the abstract). It is one company.

Where the evidence is thin

1. Models against models. The sources here show models used loosely and compare none of them head to head in a controlled study.
2. Cause. The reviews of failure and success list what went with each, from case reports and surveys. Only the merger preview and LEGO studies compare a planned activity with a less active comparison group, and each is one organization without random assignment.
3. Who does the work. The sources here say little about who should carry out OCM, specialists or line managers, or how the two roles should divide the work.

How it maps to the Unfrozen Loop

1. Week 0
   Before you start
2. 1
   Surface both ways

   Poor communication and a missing monitoring system are on the list of reasons change programs fail. Both are about information moving between the people running a change and the people living it.

3. 2
   Make sense together, top included

   The review of 292 health care transformation cases below found broad support for dialogic practice, in which the people involved work out together what the change means.

4. 3
   Start it close to the work
5. 4
   Review on a rhythm, then hold the pace

   The same failure review names the lack of a monitoring and measurement system. Reviewing on a rhythm is the Loop's answer to that gap.

6. 5
   The middle’s own weather
7. Ring
   Safe to speak, and speaking changes something

Highlighted parts are the ones this idea speaks to. The mapping is my reading, not a tested finding. See the whole Loop and the evidence for each part.

Common misreadings

"Change management is communication." Communication is one item on the failure list, alongside training, management support, resources, planning and monitoring (Mosadeghrad & Ansarian, 2014).

"Pick the right model and the change will work." Harrison and colleagues (2021) found models often used as guiding principles rather than applied step by step, and none of the sources here compares named models head to head. Hastings (2025) found broad support for dialogic over diagnostic practice, a difference in how a change is run, not in which model is named.

"Resistance is the main obstacle." Trust in management correlated with every dimension of resistance in Deng and colleagues' review (2023), which drew mostly on cross-sectional studies. That fits the idea that resistance may reflect how a change is being led, but the review cannot show it.

Using it well

1. Name the people side early. At the start of a change, write down who is affected, what changes for each group and who their manager is. That list is the start of an OCM plan.
2. Build a way for problems to come back. Set a regular point, every two weeks or every month, where managers report what is not working, and show what was done about it last time.
3. Measure adoption, not activity. Track whether the new way of working is being used, not how many emails or training sessions went out. A missing monitoring and measurement system is on the failure list in the review above (Mosadeghrad & Ansarian, 2014), which reports reasons found in studies, not tested causes.