<Li> Imperfectly imitable - not easily implemented by others . </Li> <Li> Non-substitutable - not able to be replaced by some other non-rare resource . </Li> <P> 3) Develop, nurture and protect resources that pass these evaluations . </P> <P> Given the centrality of resources in terms of conferring competitive advantage, the management and marketing literature carefully defines and classifies resources and capabilities . </P>

The resource based view (rbv) approach to strategic management