本文阐述了项目进度计划中，确定关键链的目的及意义，深入分析了传统项目计划方法存在的问题。

This paper illustrates the goal and significance of identifying critical chain in project scheduling, and analyzes the drawbacks introduced by the conventional project scheduling methods.

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修配法解尺寸链，确定修配环是关键，即主要任务是确定修配环在加工时的实际尺寸，保证修配时有足够的、而且是最小的修配量。

To determine the repair ring is the key to the method of repair settle size chain, the main task is to define the reality size of repair ring and be sure to have enough and the minimum repair volume.

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确定系统重启层级别，查询各层模块的直接耦合模块，进而构建出各重启层的重启链是实施细粒度软件抗衰策略的关键。

The establishment of rational rejuvenation levels, searching of direct coupling modules and eduction of restart chains on different levels are the keys of fine-grained software rejuvenation policy.

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