Whether it works · The control · Element
The comparison
What the control shows.
The part
What it is
The difference between personalised and default, on the measures that matter, tracked over time.
A difference that shrinks over time indicates the model is degrading, which is invisible without the control.
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.
The other elements in the control
The holdout
Who sees the non-personalised version.
LearnThe cost
What holding back the control costs.
Learn