Fast companies make a decision and then get started, understanding that they may have to launch based on imperfect information and pivot multiple times along the way. At Amazon, CEO and founder Jeff Bezos encourages employees to think of decisions as either one-way doors—those decisions that are irreversible or nearly so—or two-way doors that can be undone. Recognizing that many, if not most, decisions are actually two-way doors encourages managers to take calculated risks and move with speed, even without perfect information. “If you’re good at course correcting, being wrong may be less costly than you think, whereas being slow is going to be expensive for sure,” Bezos wrote in his 2016 letter to shareholders.