The final phase is where most "transformations" slowly die after the initial excitement fades. The new tool is deployed, the migration is technically complete, and leadership declares victory. Six months later, half the team has quietly reverted to the old way.
Phase 3: Implementing and Sustaining
Step 7: Sustain Acceleration
The most dangerous moment in a transformation is the first major win. It creates a temptation to declare victory and move on. Kotter's research shows this is fatal. The old guard — the people who were never fully convinced — will use any pause in momentum to reassert the old ways.
After the first win, press harder. Use the credibility earned from that win to tackle the next, harder problem. The goal is to build a self-reinforcing cycle: wins create credibility, credibility enables bigger changes, bigger changes create bigger wins.
Step 8: Anchor New Approaches in Culture
A change is not "done" when the technology is deployed. It is done when the new approach is "the way we do things around here" — when it is embedded in the systems that shape behavior.
Concretely, this means:
- Onboarding documentation teaches the new way from day one for every new hire.
- Promotion criteria reward behaviors that support the new approach (e.g., "writes infrastructure as code" is a criterion for senior engineer).
- Hiring interviews test for alignment with the new practices.
- Retrospectives and post-mortems reference the new standards, not the old ones.
The Rubber Band Trap: If you skip Step 8, the change exists only in the heads of the people who drove it. The moment those people leave the company — and they will — the organization snaps back to the old way like a rubber band. You will have spent two years on a transformation that lasts eighteen months.
Interviewers at Staff and Principal level often ask: "How do you make change stick?" The weak answer describes a rollout plan. The strong answer describes Step 8: "I treat a migration as incomplete until the new approach is embedded in onboarding, hiring, and promotion criteria. Technology changes are easy to revert. Culture changes are not." This signals that you think beyond the immediate project to long-term organizational health.
Key Point: Cultural anchoring is the difference between a temporary initiative and a permanent transformation. The test is simple: if you left the company tomorrow, would the change survive?