Adaptable Product Discovery is a well-documented framework developed and published by Tim Herbig. It provides even more guidance to the various phases of Product Discovery than the Double Diamond model.

A Practical Guide for Agile Teams

This is the original title of the website and the original is constantly being updated:

Product Discovery: ‚ÄčA Practical Guide for Agile Teams (2021)

Phases of Product Discovery

Contrary to what the initial hexagon suggests, Product Discovery is rarely a linear process. Rather, sometimes it is ok to cut corners. In other situations, it may be required to take a step back and start fresh because the team might got stuck: