A segment is an average of many people who are not the same
Building a segment means finding what a group of people have in common and treating that commonality as if it were the whole picture. It is a reasonable way to plan reach. It is a poor way to plan a message to any single member of that group, whose actual situation may share almost nothing with the average the segment was built from.
The person changes faster than the segment gets rebuilt
Segments are usually refreshed on a schedule: monthly, quarterly, sometimes less often. A person's circumstances, a new diagnosis, a lapsed benefit, a completed screening, change on their own schedule, which rarely lines up with the segment's. The gap between the two is where a message stops being relevant.
Understanding a person means tracking what changed, not just who they are
The more useful question is not which segment someone belongs to, but what has changed for them recently and whether that change should alter what they hear next. That requires engagement built around ongoing signals, not a periodic snapshot, which is a different design problem than segmentation was ever meant to solve.
How Embel Assist helps healthcare organizations put engagement orchestration to work.
Read the challenge in full: Intelligent Engagement