No mention in article about the worst part of corporate performance reviews: stack ranking, in which employees are ranked against each other, and only a certain

No mention in article about the worst part of corporate performance reviews: stack ranking, in which employees are ranked against each other, and only a certain number of employees can be given top marks (and top salaries), and a certain number are required to get low marks (and low salaries), force-fitting employees into categories that don't reflect reality, but that look good on paper.