The act of measuring something can influence what you are measuring.
In the world of physics, it’s true.
For example, the device inside your car’s gas tank that measures its fuel level takes a little space. That displaces liquid and results in a tiny influence over the reading on your gas gauge.
It’s a principle taught in business.
Whether you measure deadline performance, overtime use or revenue figures, making people aware of the value placed on a measurement influences their attention, attitude and eventually the results.