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For this reason we built the Tabbed Inbox through a series of build-measure-learn loops, which are called Steps in GIST. There were usability tests, longitudinal studies, fishfood and dogfood, labs, and partial launches. Each step generated a more complete version of the product, but also gave us new evidence, which helped build our confidence in the idea and get more funding. We used what we learned in each step to course-correct and improve the idea. The feature we eventually launched was profoundly better than the one we started with.

Evidence-Guided

Itamar Gilad

I emphasize to product people all the time that there is no single product discovery process just as there is no single product development/delivery process. There are many different discovery processes, all for different situations. For example, a [discovery sprint](https://svpg.com/discovery-sprints/) looks very different from customer discovery, but you should be skilled at both. Moreover, it’s important to realize that it’s not about process. It’s much more about putting in place the necessary culture, and training your team on the critical techniques.

Process vs. Model

Marty Cagan

Matsui recalled the advice product thought leader John Cutler shared with him when he first arrived at Amplitude: “The systems and processes that create the product are as much the product as the product itself.” Matsui interpreted that to mean, if a process to launch a new product is subpar or if there are leakages in collecting customer feedback, it becomes challenging to build and ship a compelling product that adds value to customers.

Product Operations

Melissa Perri and Denise Tilles

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