Essay

Evaluate the need for ultra-large dev sets in mature business applications.

Question: Analyze why applications like web search or advertising might require dev sets significantly larger than the standard 10,000 examples. In your analysis, discuss the relationship between small accuracy improvements and business outcomes.

Sample answer: For mature, high-value applications like advertising or web search, an accuracy improvement as small as 0.01% can have a massive direct impact on company profits. To reliably detect these tiny improvements rather than statistical noise, the dev set must be much larger than 10,000 examples.

Key points:

  • High-value apps like advertising or search are highly profitable.
  • A 0.01% improvement can directly impact company profits.
  • A dev set much larger than 10,000 examples is required to measure such small gains.

Rubric: The response should identify that high-value applications profit significantly from tiny accuracy improvements (e.g., 0.01%) and explain that a larger dev set is necessary to statistically detect such minute changes.

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Updated 2026-06-13

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