McKinsey. Strategic tests from four senior executives. January 2011

Strategic tests from four senior executives:
Gall Lumaden, group head of strategy and planning at SABMiller.
Jeffrey Elton, CEO and vice chairman of KEW Group.
Raymond Gllmartln, former CEO of Merck.
David Spelser, senior vice president! for strategy at SAIC.
All strategists grapple with the question of how to create and preserve competitive advantage. But individual perspectives are likely to differ, depending on a company's strategic journey, the industry it's in, and the idiosyncrasies of the organization. We talked with four current or former senior strategists from diverse corporate environments and markets about their strategic challenges—and came away with four distinct, thought-provoking lists of strategic tests.