OKR：做最重要的事

The book highlights the importance of measuring what matters, but I wonder how the author chose these particular metrics over others. Was it based on personal experience or research?

While the examples are inspiring, I’m curious whether implementing these measurement systems felt practical or daunting for real-world teams.

The emphasis on OKRs seems to be a core message—I'm interested in knowing what led to that specific focus and how the author views its evolution in business.