Question 810
At Oakridge Public Services, the data science operations team maintains public service intake and case-priority models under requirements for fair evaluation and defensible monitoring. The production acceptance reviewer checks a proposed fix for: A model's endpoint throughput suddenly falls but the operator adds instances before investigating payload size changes in incoming traffic. Which observed result BEST demonstrates that the correction works?
Explanation
Correct Answer
A controlled payload replay reproduces the bottleneck and the targeted correction restores throughput without indiscriminate scaling. This is observable proof for correction of: A model's endpoint throughput suddenly falls but the operator adds instances before investigating payload size changes in incoming traffic. The approved design change is: Correlate payload sizes, invocation mix, ModelLatency and resource metrics to identify the actual throughput constraint. The Oakridge Public Services acceptance test separates measured ML behavior from an unverified implementation claim.
Incorrect Answers
A controlled shifted feature batch triggers the intended drift alert while a reference batch remains within its baseline threshold. This would verify a different operation: Create a SageMaker Model Monitor data-quality baseline and schedule inference feature-distribution checks against it. That separate action addresses: A customer churn model starts receiving features with a distribution that differs sharply from training, but the endpoint tracks only CPU and availability. It cannot establish the required Oakridge Public Services correction for: A model's endpoint throughput suddenly falls but the operator adds instances before investigating payload size changes in incoming traffic. The decisive acceptance check is instead: A controlled payload replay reproduces the bottleneck and the targeted correction restores throughput without indiscriminate scaling.
The monitoring metadata links the live model package to its correct reviewed baseline and tests produce expected alerts. This would verify a different operation: Version monitoring baselines with each released model and capture a reviewed transition policy between old and new expectations. That separate action addresses: A model owner uses one unversioned monitoring baseline for every retraining run, so legitimate model improvements trigger constant false alarms. It cannot establish the required Oakridge Public Services correction for: A model's endpoint throughput suddenly falls but the operator adds instances before investigating payload size changes in incoming traffic. The decisive acceptance check is instead: A controlled payload replay reproduces the bottleneck and the targeted correction restores throughput without indiscriminate scaling.
The monitoring report labels distribution shift and actual error metrics distinctly and does not infer accuracy loss from drift alone. This would verify a different operation: Distinguish covariate drift from verified performance degradation and evaluate outcome labels and model-quality metrics separately. That separate action addresses: An operations dashboard treats a rising model input drift score as proof that prediction correctness already decreased without label evidence. It cannot establish the required Oakridge Public Services correction for: A model's endpoint throughput suddenly falls but the operator adds instances before investigating payload size changes in incoming traffic. The decisive acceptance check is instead: A controlled payload replay reproduces the bottleneck and the targeted correction restores throughput without indiscriminate scaling.