什么是关键路径? [英] What is Critical Path?

问题描述

作为开发人员，我有时会在开发执行的上下文中遇到术语关键路径".从维基百科我知道这与确定必须的必要任务有关> 在一个项目中完成.

As a developer, I sometimes come across the term 'Critical Path' in the context of development execution. From wikipedia I know it has to do with identifying the necessary tasks that must be completed in a project.

我的理解正确吗?

您遇到的关键路径的最佳定义是什么?规划项目时如何确定关键路径?

What is the best definition of Critical Path you have encountered? How would identify the Critical Path when planning a project?

推荐答案

我不确定这是否是最佳定义，但它肯定是最简洁的定义之一:

I'm not sure if it's the best definition, but it's certainly one of the most succinct:

依赖步骤的顺序确定所需的最短时间执行操作

另一个稍微长一点的，在项目管理的背景下(类似于您链接到的维基百科文章):

another, slightly longer one, and in the context of project management (similar to the Wikipedia article that you linked to):

通过一系列活动的路径，考虑到相互依赖，其中晚期完成活动将有一个对项目结束日期的影响或延迟一个关键的里程碑(可能有多个关键路径)

您的理解是正确的，确定通过给定项目的关键路径的第一步是首先实际定义完成项目所需的所有单个步骤，然后检查每个步骤"以确定该步骤对项目中的其他步骤以及整个项目的依赖性/重要性.

Your understanding is correct, and the first step to identifying the critical path through a given project, would be to firstly actually define all of the individual steps required to complete the project, then to examine each and every "step" to determine just how dependent/important that step is to both other steps in the project as well as the project overall.

假设我想粉刷一堵墙.步骤可能是(这是一个有意简化的示例):

Let's say I want to paint a wall. The steps might be (this is an intentionally simplified example):

• 买点油漆
• 买一些画笔
• 粉刷墙壁

好吧，鉴于最终结果将是一堵漂亮的新粉刷墙，这里的第一步(买点油漆)对整个事情来说绝对是至关重要的.如果我不能做到这一点，其他一切都会停止.此外，此后的每一步都完全取决于先前已完成的步骤 1.因此，在这个(公认是人为的)示例中，关键路径的第一步是购买一些油漆.

Well, given that the end result would be a nice, freshly painted wall, the first step here (Buy some paint) is absolutely critical to the whole thing. If I can't achieve that, everything else stops. Also, every step after that is entirely dependent upon step 1 having been completed previously. Therefore, in this (admittedly contrived) example, the first step in the critical path is buying some paint.

相反，第 2 步对于出色的油漆工作很重要，但如果我只是将油漆扔在墙上，则可能会被省略！

Conversely, Step 2 is important for a good paint job but could potentially be omitted if I just throw the paint at the wall!

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