Rénjìn-qícái, wùjìnqíyòng, shì guǎnlǐ de lǐxiǎng zhuàngtài.
Everyone contributing fully and every resource used fully - that's the management ideal.
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From 《淮南子·兵略训》 (Han dynasty): 若乃人尽其才,悉用其力 "if everyone exerts their talent and uses all their strength." A classical ideal of efficient statecraft, often paired with 物尽其用 (every object used fully) and 地尽其利 (every plot of land yields its best).
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Formal and admiring, common in management writing, policy speeches, organizational descriptions. The implicit subject is usually the system or leader who enables this (the manager 让 everyone 人尽其才), not the workers themselves.