I am confused when people even consider measuring productivity with hours spent. It's like trying to measure the brightness of a lightbulb with the amount of ti

I am confused when people even consider measuring productivity with hours spent. It's like trying to measure the brightness of a lightbulb with the amount of time it's been turned on - two totally different quantities. Usually productivity can only be estimated by your boss, who measures it with your salary, which can be converted to $/h or EUR/h. The work you get done is then logically measured by hours * salary. That's what it's worth to the company, anyway.