将设计公差分成全局公差和局部公差，通过引入相对公差因子概念，将全局公差转化为相对公差因子，作为特征间约束的权值。

By introducing the concept of relative tolerance factor, the global tolerances were transferred into relative tolerance factors as the constraint weights between features.

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分析在设计过程中自动生成局部尺寸链和全局尺寸链的方法，建立公差设计和反馈的整体框架。

The local dimension chain and overall dimension chain are set up automatically. The whole frame of tolerance design and relevant feeding back is established.

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分析在设计过程中自动生成局部尺寸链和全局尺寸链的方法，建立公差设计和反馈的整体框架。

Then the process model of tolerance synchronous synthesis is built. The local dimension chain and overall dimension chain are set up automatically.

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