Outputs vs. Outcomes
The most important distinction in product: an output is what you build; an outcome is the change it creates. Confusing them is how teams stay busy while nothing improves.
Everyday example — the gym
"I went to the gym 20 times this month" is an output — an activity you did. "I can now run 5k without stopping" is an outcome — the change that activity produced. You can hit the gym 20 times and get nothing if you do it wrong. The gym visits only matter because of the change they're supposed to cause. Same with shipping features: the feature isn't the win; the change it creates is.
Output
A feature, screen, or release. "We shipped a redesigned dashboard." Easy to count, easy to fake progress with.
Outcome
A measurable change in behavior or results. "Users now complete setup 30% more often." What actually matters.
A team that measures itself only by outputs is a feature factory — shipping endlessly, learning nothing about whether any of it helped.
Quick check
Which of these is an outcome, not an output?