Vitality curve

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A vitality curve is a performance management method where employees are ranked against their coworkers. It’s also known as stack ranking, forced ranking, or rank and yank. The concept was popularized by General Electric’s Jack Welch in the 1980s. The traditional idea is the 20-70-10 split: the top 20 percent are the most productive, the middle 70 percent are solid performers, and the bottom 10 percent are nonproducers who should be fired. The approach is linked to the Pareto principle, which suggests a small group accounts for a large share of results in many situations.

How it works and why it matters
Welch described ranking top executives into A, B, and C players. A players are the stars, B players are vital because they make up most of the group, and C players are nonproducers. The aim is to reward A and fire C, though Welch acknowledged the judgments weren’t always precise. Critics say such systems encourage a ruthless, zero-sum culture that hurts collaboration, innovation, and morale. Proponents argue they identify problems quickly and push underperformers to improve or leave.

How widespread and what it’s called
Many companies use some form of forced ranking under milder names like talent assessment or performance procedures. Surveys over the years show a mixed picture: usage rose and fell, with some years seeing a sizable share of firms using rank-based evaluations, others showing declines as companies shifted to softer approaches. By the mid-2010s, several large organizations had abandoned the practice, while others continued in various forms.

Criticisms and risks
Stack ranking can demotivate workers, foster unhealthy competition, and undermine teamwork. It can distort decision-making, encourage politics, and lead to biased outcomes or discrimination lawsuits. Managers spend substantial time on performance reviews and related processes, which adds to costs. In some cases, removing or demoting top performers to hit quotas can backfire, especially during layoffs or organizational changes.

Notable examples and shifts
- IBM uses a system called Personal Business Commitments to drive performance across hierarchies.
- AIG used a five-tier ranking that determined bonuses.
- Yahoo used quarterly performance reviews with tiered outcomes.
- Amazon runs an Organization Level Review where managers debate and adjust rankings.
- Microsoft moved away from its early stack-ranking approach, adopting and later abandoning a formal vitality-curve style process after years of criticism and public scrutiny.
- Ford, Adobe, Medtronic, Kelly Services, New York Life, Juniper Networks, Accenture, Goldman Sachs, Gap and others have each shifted away from strict forced ranking at various times.

Critiques from management thinkers
Prominent voices argue that evaluating people merit-based on fixed distributions ignores the realities of teams and organizational systems. Deming warned against merit-based evaluations, emphasizing that performance largely reflects processes and systems created by management. Critics like Pfeffer and Sutton question the overall usefulness of forced ranking, noting limited evidence that it improves organizational results. Some also point out that ratings can become self-fulfilling, with individuals changing their behavior to fit the label rather than genuinely improving.

Bottom line
The vitality curve is a controversial approach that can drive top performers and expose issues quickly, but it often damages morale, collaboration, and long-term innovation. Many large companies have moved away from rigid rank-and-yank practices or replaced them with more collaborative, development-focused methods.