In the optimal supervision level, when contractor's marginal productivity is high and marginal cost is low, it is easier to supervise and the marginal revenue of supervision is high.
在最优监督水平下，作业公司的边际生产率越高，边际成本越低，越容易监督，监督带来的边际收益越高。
But this arrangement was considered a broken home because the ideal family was the nuclear family, and there was an emotional cost of not being able to supervise one's own children.
但这项安排被认为是一个破碎家庭，因为理想的家庭是核心家庭，有一个情感的成本无法监督一个人的自己的孩子。
Supervise the statistician to make out the entire process quality cost of statistics, the analysis, the control and carries on the continuous the improvement.
督促统计员对生产制造全过程质量成本进行统计、分析与控制并不断进行质量的持续改进。
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