Load Path Criticality is a discrete variable that ranges from 0 to 1. A value of 1 represents region in the model that is critical to resist the applied load. A value of 0 represents a region in the model that is not critical to resist the applied load. When attempting to achieve the target mass, Shape Optimization removes the elements with the lowest Load Path Criticality values first. Drag the sliders on the legend to display the Load Path Criticality for each region of the model.