The resource-based view of competitive advantage states that for a firm to maintain sustainable competitive advantage it must control a set of exploitable resources that have four critical characteristics. what are these characteristics?

Competitive advantages are conditions that allow a company or a country to produce a good or a service at equal value but at a lower price or in a more desirable fashion. If a firm is to maintain sustainable competitive advantage, it must control a set of exploitable resources that have four critical characteristics. These resources must be; valuable, rare, imperfectly imitable (tough to imitate) and also they should be non substitutable.