Read the original at Lenny’s Newsletter ↗lennysnewsletter.com · subscriber post
By Lenny Rachitsky · lennysnewsletter.com · @lennysan on X · YouTube · LinkedIn
Lenny Rachitsky introduces Core 4, a unified developer productivity framework built with DX and the authors of DORA, SPACE, and DevEx. The post explains how to baseline team velocity with an anonymous survey, calculate Speed, Effectiveness, Quality and Impact scores, and link efficiency projects to business impact and ROI.
Subscriber post — summary only01Key takeaways
- Product velocity combines speed with direction, so teams must align on priorities, not just move fast.
- Core 4 is a basket of metrics meant to be read together, balancing speed, quality, effectiveness and impact.
- Quantitative metrics show what is happening; qualitative input from engineers explains why it happens.
- Translate efficiency gains into hours or dollars to make tech investments comparable with new feature work.
- Common friction points include slow builds and tests, lack of deep work time, and poor production debugging support.
“Engineering velocity is everything.”Guillermo Rauch · Lenny’s Newsletter
02Frameworks mentioned
Summary and takeaways written by PM Atlas; quotes are short excerpts. © the original author.