Then the night before, after the press had been alerted to the unveiling, internal testing revealed a software bug that might erroneously inform customers who purchased the product that it was sold out. The launch was delayed, and beleaguered project members had to come in on a Saturday to analyze the issue. Amazon also sent in the “principal engineers”: an elite squad of about a dozen technical wizards at the company who parachute into troubled projects to diagnose problems.
