This lack of expertise in execution can have serious consequences. In a recent survey of senior executives at 197 companies conducted by management consulting firm Marakon Associates and the Economist Intelligence Unit, respondents said their firms achieved only 63% of the expected results of their strategic plans. Michael Mankins, a managing partner in Marakon's San Francisco office, says he believes much of that gap between expectation and performance is a failure to execute the company's strategy effectively.