Not an essay just a brief question, must be original and pass turnitin.Why is it necessary to regularly evaluate business strategy?

 Implementing Business-Level Cooperative Strategies 

As noted in Chapter 9, the two types of business-level complementary alliances are verti-cal and horizontal. Firms with competencies in different stages of the value chain form a vertical alliance to cooperatively integrate their different, but complementary, skills. Firms combining their competencies to create value in the same stage of the value chain are using a horizontal alliance. Vertical complementary strategic alliances such as those developed by Toyota Motor Company are formed more frequently than horizontal alliances? A strategic network of vertical relationships such as the network in Japan between Toyota and its suppliers often involves a number of implementation issues.'" First, the strategic cen-ter firm encourages subcontractors to modernize their facilities and provides them with tech-nical and financial assistance to do so, if necessary. Second, the strategic center firm reduces