How do you know if your employees’ skills are up to snuff? Historically, managers have checked once during an end-of-year performance review. Tides are beginning to turn in corporate America. In an effort to provide employees with more effective feedback, Accenture and other corporate giants like Deloitte, The Gap, Adobe, and Microsoft have abandoned the age-old annual tradition for more frequent manager-led check-ins. While this is a step in the right direction, some experts say there is more to be done. A recent article in The New Yorker suggests that the new practices are inherently biased as “more than half of a given performance rating has to do with the traits of the person conducting the evaluation, not the person being rated.” To overcome biases, experts recommend that companies have more people weigh in on an employee’s performance. This raises an interesting question: Who should these other people be? Should they include more managers, outside experts, peers, or all three?