What is the meaning of 'utilization' in Karamba 3D?

As a new user of Karamba 3D, I trying to perform non-linear analysis to study buckling failures in some beam structures. I have to assess the stresses and I know that using ‘Utilization of elements’ for beam-based simulations, would provide this information. However, I am not completely clear regarding the meaning of ‘utilization’ here and how does it relate to stresses. Any explanations would help!

Hi -
Please don’t double-post and keep your questions in the correct category.