Change the Problem Landscape
Elon Musk's question, "What did you get done this week?", has become a meme for productivity.

A better quetions is:
What problems did you solve, preempt, and set in motion this week?
Don’t just tell me what you did. Tell me how you changed the problem landscape. That is the real measure of useful work. A task list shows activity. It does not necessarily show impact.
Solving a real problem does not simply remove an item from a list. It changes the situation. It closes some paths, opens others, and reshapes what matters next. Every solution creates new conditions. Every neglected problem has the potential to grow into a worse one.
Of course, most real problems are not fully solved in a week. But that is still the right standard. A manager should emphasize outcomes, while making rational exceptions for work that clearly moves a hard problem forward. The point is not to reward people for merely naming the problems they are working on. It is to ask how those problems changed because of their work.
So yes, results matter. But the results that matter most are not just completed tasks. They change the problem landscape.