Why build a very large development set for a mature business application?
Question: In a high-volume recommendation system for an online marketplace, what business reason can justify spending the time and money to create a development set much larger than 10,000 examples?
Sample answer: If even a tiny improvement in model quality can change revenue at scale, the team may need a much larger development set to measure that improvement reliably. In a mature product, a change as small as 0.01% can matter financially, so the extra evaluation data helps distinguish real gains from noise.
Key points:
- The application has direct financial impact.
- The team needs to detect very small performance gains.
Rubric: The answer must mention financial impact and the need to measure very small improvements.
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Why build a very large development set for a mature business application?