The FAA will judge Boeing's progress largely by measures such as employee surveys about safety, the level of whistleblower complaints, and how many times jobs are done out of order on the factory floor, which Whitaker said increases the risk of mistakes. He said that since Boeing submitted a plan to improve its manufacturing and take measurements, "They have been trending in the right direction." The FAA stepped up its scrutiny of Boeing, including putting safety inspectors in the factories, after the Alaska Airlines blowout.