A company that has achieved Six Sigma experiences just 3.4 such errors per million opportunities to err, a laudably low failure rate (or, framed positively, a 99.9997 percent success rate). To get a sense of what this means, consider that a company that ships 300,000 packages per year with a 99 percent success rate sends 3,000 packages to the wrong place. If that same company achieved Six Sigma, only a single package would go astray.
