Nicole Forsgren explains her 'four box framework' for metric design and hypothesis testing during an interview on developer productivity and measurement.
“Now always start with words. Do not start with data. You always start with words.”
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More from Nicole Forsgren
Insight
Forsgren: DORA metrics alone are insufficient in the AI era
“If that's all you're looking at, it's not going to be sufficient anymore because AI has now changed the way we think about feedback loops.”
Nicole ForsgrenOct 19, 2025▶ 14:08How to measure AI developer productivity in 2025 | Nicole Forsgren
AssertionSupported
Forsgren: Software delivery speed and stability move in tandem, not trade-offs
“When we started measuring these, we found that they move in tandem. Now, like, with very strong significance, right, from a statistical standpoint. Now, what this means is, now we say speed and stability move together.”
Nicole ForsgrenJul 30, 2023▶ 15:01How to measure and improve developer productivity | Nicole Forsgren (Microsoft Research, Github)
AssertionSupported
Forsgren: Software delivery performance does not statistically vary by company size
“We saw no statistical significance between Small companies and large companies, the only statistical significant, statistically significant difference was with retail.”
Nicole ForsgrenJul 30, 2023▶ 22:55How to measure and improve developer productivity | Nicole Forsgren (Microsoft Research, Github)
Insight
Forsgren: AI Coding Tools Should Free Up Cognitive Space, Not Prompt Layoffs
“Anyone who's looking at that and like, dear CEOs or whoever who are like, now I can lay off half my workforce. That's not what this is about, right? It's not about taking a task and cutting your time in half because now what we've enabled is your ability to do…”
Nicole ForsgrenJul 30, 2023▶ 52:35How to measure and improve developer productivity | Nicole Forsgren (Microsoft Research, Github)
Insight
Forsgren: Developer surveys almost always prove more accurate than telemetry during conflicts
“If there is ever a disagreement between the surveys and the instrumentation, which is incredibly advanced, almost every time that I've ever heard of the surveys are correct and not the instrumentation.”
Nicole ForsgrenJul 30, 2023▶ 55:55How to measure and improve developer productivity | Nicole Forsgren (Microsoft Research, Github)
Opinion
Forsgren: Most developer productivity metrics are a lie
“I will say most productivity metrics are a lie.”
Nicole ForsgrenOct 19, 2025▶ 12:24How to measure AI developer productivity in 2025 | Nicole Forsgren
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