NX Which "neutral factor" should be chosen for an inside / outside body?

Which factor is necessary to represent the different lengths

If neutral factor is zero, flatten length of bend will be calculated using inner bend radius and if neutral factor is equal to one, flatten length will be calculated using outer radius.

Though, user can set neutral factor value between zero and one also and flatten length will be calculated accordingly.

 Flatten length  of bend in sheet metal can be controlled by neutral factor.

 Workaround : If user wants flatten length of bend equal to length of outer bend face, user can apply neutral factor equal to 1 using Resize Neutral Factor feature in Sheet Metal application.  

Flat pattern, Flat solid, Flattening and forming