Shape Up is how Basecamp does product development. You can use it as a fully-fledged project management framework, as a toolbox full of techniques to help teams ship, or as a set of principles on which to design your own team's processes.
The book "Shape Up" was written by Ryan Singer, Basecamp's former Head of Product Strategy, and released in the Summer of 2019. Since then, many teams across the globe have started adopting this way of working. Some as a whole. Others by tweaking it to their context.
If you're interested to learn more, read the book, join the Shape Up forum or check out the Shapers & Builders podcast.
Shape Up is available to read online, in PDF and print. Head over to Basecamp's official website to start reading.
There's a very active community in the official Shape Up forum. Here, early adopters share their tips and tricks.
David hosts the Shapers & Builders podcast, where the first season is a collection of case studies on teams who use Shape Up.