Organizations overlook up to half of the potential savings when they implement or expand operational-improvement programs inspired by lean, Six Sigma, or both. Some companies set their sights too low; others falter by implementing lean and other performance-enhancing tools without recognizing how existing performance-management systems or employee mind-sets might undermine them. Still others underestimate the level of senior-management involvement required; for example, they delegate responsibility for change programs to their lean experts or Six Sigma black belts--practitioners who are technically skilled but often lack the authority, capabilities, or numbers to make change stick.
Source: McKinsey Quarterly
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