apply-peter-principle-check

Apply Peter Principle Check

Before promoting someone based on strong performance in their current role, explicitly test whether the skills that made them successful there are the same skills the next level actually requires — because promotion systems that reward current-role performance alone systematically promote people into roles where those specific skills no longer apply, and this is a measured, documented organizational pattern, not just an old joke about incompetent managers.

Why This Is Best Practice

Why best: The mechanism is specific and mechanical, not a claim about individual incompetence: if promotion decisions are based primarily on demonstrated performance in the current role, and the skills required at the next level are genuinely different (for instance, individual sales performance versus managing a sales team), then the promotion criterion systematically selects for the wrong skill set at the point of promotion. Because promotion typically stops once someone is no longer excelling, organizations following this pattern accumulate people who plateau at the specific level where their old skill set stopped being what the job required — a structural consequence of the selection mechanism itself, not a claim that people generally become incompetent over time.

Peter & Hull, "The Peter Principle" (1969): The originating book formalized the observation that, in hierarchies where promotion is based on performance in the current role, employees tend to be promoted based on success at their current level until they reach a role whose requirements no longer match their demonstrated skill set — at which point they stop being promoted, having reached what the book termed their "level of incompetence." The book's core, falsifiable claim is specifically about the selection mechanism (promote based on current performance) producing this predictable pattern, not a claim that people are generally or permanently incompetent.

Benson, Li & Shue (2019): This empirical study, examining promotion decisions across a large sample of sales organizations, directly tested the Peter Principle's predictions and found firms disproportionately promoted their best current sales performers into sales management roles, despite those same performance metrics having no positive — and in some specifications a negative — relationship with subsequent success as a manager, and despite better predictors of managerial potential being available in the same data. The study also found that when firms did weigh managerial-potential indicators alongside current-role performance, promoted managers performed measurably better, providing direct causal-adjacent evidence that testing for next-level fit, not just current-role performance, materially improves promotion outcomes.