Because nobody's perfect (even if you're big and powerful), we all need someone to check our work. Case in point with a very public blunder on Wall Street yesterday. The Big Board celebrated Spotify's listing on the New York Stock Exchange by flying Switzerland's red-and-white flag ... even though Spotify is a Swedish company. Oops. Sweden's blue-and-yellow banner is now fluttering in the NYC spring breeze, reminding us all that quality assurance is not a perk or a nice-to-have, but an essential business practice. …see more