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In times of crisis lies great opportunity. After Prem gave us the bad news earlier today, Avi Bernstein came with another major issue: the concept shift menace.

A concept shift in our case would be a major change in your data characteristics or underlying creation. The problem with concept shifts in the example bug prediction model is that data that was created before a concept shift appeared it becomes a burden to the model and decreases its predictive power.

The “solution” make your models more human and let them forget!

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