Unverified50% confidenceFactExact time
The 40% rule proposed by Sean Ellis is used to quantify PMF: if more than 40% of users say they would be very disappointed if they could no longer use the product, the product has preliminarily achieved PMF.
1
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50%
Confidence
Long-term
Relevance
9/11/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedSean Ellis's "40% test" holds that if more than 40% of users say they would be "very disappointed" if the product disappeared, then PMF has been achieved.77% similarUnverifiedSome research estimates that fewer than 20% of strategies selected through backtesting within quantitative funds remain consistently effective in live trading.67% similarUnverified量化推理从FP16降至FP8可将显存需求减半，从FP8降至FP4可进一步减半63% similarUnverified业界顶级集群的MFU（模型算力利用率）通常在35%-60%之间60% similar
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