Quality regressions only appear when the system downshifts to a cheaper model after queue buildup. How would you investigate?

Instruction: Explain how you would debug dynamic quality regressions tied to load-based routing.

Context: Tests how the candidate diagnoses the problem, chooses the safest next step, and reasons through recovery. Explain how you would debug dynamic quality regressions tied to load-based routing.

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I would inspect the downshift path as a separate product mode. The queue-triggered switch likely changes both model quality and request mix at the same time, which makes the regression easy to miss in blended metrics.

I would compare matched requests across normal and downshift conditions, then look...

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