1.2Standard
Input distribution is stable but the relationship to outcomes changes.
Investigate degradation.
Choose two checks.
× Incorrect
Compare input, prediction, label relationship, and errors over time and check business rules, label definitions, and model versions.
Detailed explanation
CorrectReview business, label, user, and model-version changes over time
Causes can be traced.
IncorrectStable inputs prove the model relationship is unchanged
Concept drift can remain.
CorrectCompare input distribution, prediction distribution, label relationships, and errors by period
Relationship changes can be isolated.
IncorrectAssume low volume is the only cause and skip label review
The cause may be wrong.
Check official documentation
Compare the following points with the official documentation.
AWS公式AIF-C01 Domain 1.2・3.3の概念ドリフト、モデル監視、ラベルを確認する。
Official references
What to confirm
入力分布の変化だけでなく、結果との関係や業務変更を含めてドリフトを調査できる。
Key points
- Concept drift
- Label definition
- Time series
Notes
- Environment: AWS公式AIF-C01試験ガイドとAWS公式ドキュメントの確認
- Compare the definition with the AIF-C01 objective and the service documentation before applying it.
- Keep the concept separate from a particular answer choice or implementation step.
Foundation review
Concept drift
A change in the relationship between features and the target over time.
Label definition
The rule that determines what target value an example receives.
Question IDAWS-AIF-474
EnvironmentAWS公式AIF-C01試験ガイドとAWS公式ドキュメントの確認
Last technical review2026-08-20
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