Question 90
The reliability team at Mercury Travel Tech is closing a corrective-action ticket for this ML failure: A live chat assistant uses the largest available Gemini model for every trivial classification request and exceeds its latency budget. Which independently observable result best verifies that the remediation works?
Explanation
Correct Answer
A representative load test meets the quality floor while p95 latency and per-request token spend fall within target. This controlled observation specifically validates the proposed remedy: Benchmark smaller appropriate Gemini model variants and optimize routing by measured quality, latency, and token cost. It addresses the documented failure at Mercury Travel Tech: A live chat assistant uses the largest available Gemini model for every trivial classification request and exceeds its latency budget.
Incorrect Answers
Two candidate models are compared on the same withheld prompts and the selection record cites measured rubric scores. This is evidence for a different corrective change: Create a task-specific blind evaluation rubric covering correctness, safety, refusal behavior, latency, and cost before model selection. That other change addresses: A hospital team chooses a text-generation model based on a generic leaderboard rather than its clinical terminology and refusal criteria. It does not validate the specific Mercury Travel Tech remediation for: A live chat assistant uses the largest available Gemini model for every trivial classification request and exceeds its latency budget. The necessary check instead is: A representative load test meets the quality floor while p95 latency and per-request token spend fall within target.
Injection test documents do not make the model reveal restricted instructions or perform prohibited actions. This is evidence for a different corrective change: Treat retrieved content as untrusted data and enforce instruction hierarchy plus input/output safeguards. That other change addresses: A customer-facing LLM assistant replies to malicious embedded instructions in retrieved articles that attempt to override system rules. It does not validate the specific Mercury Travel Tech remediation for: A live chat assistant uses the largest available Gemini model for every trivial classification request and exceeds its latency budget. The necessary check instead is: A representative load test meets the quality floor while p95 latency and per-request token spend fall within target.
A held-out set of paraphrased support queries retrieves relevant permitted passages at the specified recall level. This is evidence for a different corrective change: Use text embeddings and a governed semantic retrieval index with freshness and access rules. That other change addresses: A helpdesk assistant searches support documents by exact keyword only and misses semantically equivalent troubleshooting articles. It does not validate the specific Mercury Travel Tech remediation for: A live chat assistant uses the largest available Gemini model for every trivial classification request and exceeds its latency budget. The necessary check instead is: A representative load test meets the quality floor while p95 latency and per-request token spend fall within target.