Some past example that come to mind. Kudos to all of the people mentioned for trying ambitious things, and writing up the retrospectives:
Not strictly speaking “EA”, but an early effort from folks in the rationality community started an evidence-based medicine organization called MetaMed
Zvi Mowshowitz’s post-mortem: https://thezvi.wordpress.com/2015/06/30/the-thing-and-the-symbolic-representation-of-the-thing/
Sarah Constantin’s post-mortem: https://docs.google.com/document/d/1HzZd3jsG9YMU4DqHc62mMqKWtRer_KqFpiaeN-Q1rlI/edit
Michael Plant has a post-mortem of his mental health app, Hippo
Looking at around, I also found this list
Some other posts are the Good Technology Projects’ postmortem, a postmortem of a mental health app by Michael Plant, organisations discuss their learnings in retrospectives like Fish Welfare Initiative or in posts announcing decisions to shut down like Students for High Impact Charities. In the Rationalist community, there was the Arbital Postmortem. You can see more examples on the Forum postmortems and retrospectives tag, and examples from the LessWrong community in their analogous tag.
Some past example that come to mind. Kudos to all of the people mentioned for trying ambitious things, and writing up the retrospectives:
Not strictly speaking “EA”, but an early effort from folks in the rationality community started an evidence-based medicine organization called MetaMed
Zvi Mowshowitz’s post-mortem: https://thezvi.wordpress.com/2015/06/30/the-thing-and-the-symbolic-representation-of-the-thing/
Sarah Constantin’s post-mortem: https://docs.google.com/document/d/1HzZd3jsG9YMU4DqHc62mMqKWtRer_KqFpiaeN-Q1rlI/edit
Michael Plant has a post-mortem of his mental health app, Hippo
Looking at around, I also found this list