Most change programs create activity: kickoff meetings, presentations, and communication. These make change visible, but they do not change behavior.
The question is not whether the change was explained. The question is whether people actually changed how they work.
Adoption
Adoption does not occur because people understand a message. Adoption occurs when management, systems, and workflow make the new behavior the only viable way to work.
Some people change quickly. Some change slowly. Some resist. Some never change unless forced.
This has been well understood for decades in social psychology and behavioral research.
Managers
Managers are the critical piece.
Managers define what acceptable work looks like. They assign work, review work, and reinforce expectations daily.
If the manager does not enforce the new behavior, the change does not happen.
Operational Reality
If a new system is installed but people continue using spreadsheets, parallel systems, or workarounds, the organization has not changed.
Behavior under observation is not the test. The test is whether behavior continues over time, under normal conditions, without supervision.
If the old way still exists in parallel, the organization has not changed.
Execution
A project is complete when the system is installed.
Change is complete when the system is used correctly when no one is watching.
PMI Digital — Where Change Meets Science