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Swag Valance's avatar

Great post.

Of course, as we continuously learn about what metrics we should focus on, more complex, composite metrics can sometimes get us one step closer to what is important.

Netflix has taken stabs at this (https://netflixtechblog.com/improve-your-next-experiment-by-learning-better-proxy-metrics-from-past-experiments-64c786c2a3ac) as have academics (https://arxiv.org/abs/2402.03915).

But one of my favorite illustrations came a couple months ago from Spotify, who developed an "Experiments with Learning" (EwL) framework: https://engineering.atspotify.com/2025/9/spotifys-experiments-with-learning-framework

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