問題文
A team is deciding when to retrain. Which option correctly identifies the two situations that justify retraining? (Select two.)
選択肢
- The outcome-based metrics have declined over several consecutive periods and the decline is not explained by an upstream defect.
- An upstream pipeline started sending nulls for a feature, because retraining is what teaches the model how to handle the new values it is now receiving.
- A single day showed an unusual distribution of one feature, because any deviation is a signal to refit.
- A new modeling library version was released, because staying current is a reason in itself to produce a new model version.
- The relationship the model relies on has genuinely changed, for example because a product or a policy changed.