通过对流水线上操作人员在不同作业姿势下的疲劳分析，研究站姿、坐姿和站、坐交替三种姿势的疲劳时间阈值和劳动时间率。

By analyzing operator's fatigue states under different working posture on assembly line, studys the fatigue threshold and working time rate of standing posture, sitting posture and alternate posture.

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因此，许多分析人士着眼于劳动生产率，通常来讲就是用总产出除以全部的劳动人口或者劳动时间来计算。

Most analysts focus on Labour productivity, which is usually calculated by dividing total output by the number of workers, or the number of hours worked.

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利用直接劳动时间计算预先决定的预算率。

Calculate the predetermined overhead rate based on direct Labour hours.

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