
S1 · L012:16
The Lighthouse Keeper
You are not the keeper of the logbook: you are responsible for the ships, so measure the change, not the activity.
Strategy
Glossary
The change a product creates in a customer's life or business, such as new users reaching their first win in five minutes. Outcomes are what customers feel and pay for; they are the opposite of output.

You are not the keeper of the logbook: you are responsible for the ships, so measure the change, not the activity.

The most dangerous bugs live between teams: build a shared language, involve engineers early, and listen when they raise a flag.

Don't hide the future in a drawer to protect the present: watch the edges, compete with yourself, and stay loyal to the customer's job.

Real builders own the outcome: pick one thing you shipped, stand under it with real customers, and fix what creaks.