The means by which competitive advantage might be gained differs, depending on whether a resource...

Superior profitability depends on the firm's possession of unique resources.

Super normal profits result from either cost leadership, differentiation or focus.

Competitive advantage derives from a firm's position in relation to its competitors, customers and stakeholders.

Competitive advantage stems from some valuable asset or competence possessed by the firm.

Organisations need to ensure they are continually monitoring the market place to make sure that their core competences are still valid.