Nonsubstitutability is a critical resource attribute for sustaining a competitive advantage. Otherwise, a rival may find a different resource that can nullify an advantage without actually imitating the focal firm’s resource or capability. An example might be Apple’s iPhone patent for the “screen bounce” when the user scrolls to the bottom of a page or list. Early Android phones had the same feature but, more recent phones, work around this patent by displaying a blue tinge at the edge of the screen (see picture) when one has scrolled to the end. In this way, many patents do not confer an advantage as rivals find ways to work around them and customers don’t perceive a significant difference in the product. In class, one might give this example coupled with the video below which depicts a battle between Fezzik and Westley in the Princess Bride — agility and size can be discussed as substitutes in determining competitive advantage (of course, Westley wins though he at first seems to be at a disadvantage).
Contributed by Russ Coff