This "Method" button has the following two settings:
EXPLODE
Will display component parts in the "Linked Components"
list box for the selected "Maintained Parent" part.
IMPLODE
Will display parent parts in the "Linked Parents" list box
for the selected "Replaced By Component" part.
The following are valid settings for the "Method" buttons:
LHS = Explode then RHS = Explode
LHS = Implode then RHS = Implode
LHS = Part Only then RHS = Explode OR
LHS = Part Only then RHS = Implode