What causes a company's strategy to evolve from one version to the next?

$1)$ Changing management conclusions about which of several appealing strategy alternatives is actually best

Ongoing turnover in the managerial and executive ranks; new managers often decide to shift to a different strategy

The importance of keeping the company's business model fresh and up$-$todate to appeal to the $24-$hour business news networks

The proactive efforts of company managers to improve aspects of the strategy to respond to changing customer requirements and strategic maneuvers of rival firms