This paper formalizes a product structure with related characteristics based on AND/OR tree, and shows that the employment of this formalization can achieve a more flexible BOM design.
形式化定义和描述了一种基于与或树的产品结构及其相关特性，基于该结构的BOM设计具有更好的产品配置柔性。
At present the structure and form of employment are diversified and several flexible employments have become important form of employment.
当前，就业格局和就业形式呈现出多样化的特点，多种灵活就业在当今中国的劳动力市场正日益成为重要的就业形式。
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