Segmentation · The basis · Element
The prediction test
Whether the segments actually behave differently.
The part
What it is
Checked in the data: purchase rate, product mix, retention and price sensitivity by segment.
Segments that behave identically should be merged, and the merge is usually resisted because the segmentation was expensive.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.