Rectang Corp., an e$-$commerce firm, recently adopted a new supply chain management system. By virtue of the new system, the company is able to deliver products to customers in a shorter period of time than other e$-$commerce companies. The supply chain management system may become outdated in the near future; however, it has presently helped Rectang Corp. become the industry leader. Rectang Corp. has achieved

$$ quality assurance

first$-$mover advantage

competitive inertia

$$ vertical integration