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

Sources

50%

Confidence

Long-term

Relevance

9/11/2026

First Seen

Sources

The New Paradigm of AI Product Launches: A Two-Way Bond Between Team Passion and User Communities

Related Entities

肖恩·埃利斯person 40%法则concept

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% similar Unverified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% similar Unverified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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