What is the z-value?
The z-value specifies the correct trigger values for the binding of ski shoes. This should prevent injuries while skiing. These injuries can happen if the binding releases the shoes either too early or too late. Both can be very dangerous. That's why a compromise needs to be made.
The goal is to reduce the torque applied to the shin of the skier. By using empirical studies the standard DIN/ISO 11088 was written.
The calculated value is directly adjusted at the front and back part of the binding. The value corresponds to the torque but only under perfect circumstances. The actual setting depends on the combination of binding and shoes and can differ from the calculated value.