不知何故，你没有听到宽容和容忍分析。显然几何尺寸和公差是每个工程师生活的重要组成部分，以及任何如此日常的任何东西，但都是至关重要的，软件已经创建了帮助。
As engineers examine the interaction of critical components in systems, they are typically performing some level of tolerance analysis.
首先让我们看看进行公差分析的原因吗？我们发现了一些。
To test and improve geometric dimensioning and tolerancing.
To Determine gap and flush conditions based on manufacturing processes.
To optimize these processes by simulating and optimizing manufacturing and assembly.
To reduce overall product variation.
控制返工和废料
解决制造问题，可以通过使用测量数据来完成
To resolve issues with the CAD model.
Software producers include Sigmatrix, of McKinney, Texas, which makes Cetol 6σ tolerance analysis software–just updated to version 10.2. The tolerance analysis software helps product development teams understand the impact of dimensional and assembly variation on their designs.
这允许他们在制造中出现或更糟糕的情况下，在他们的客户手中进行必要的调整。
该软件包括基于该过程中的用户步骤的直观消息。这些“顾问”消息显示了用户在需要执行此操作时需要做的事情。
Dimensional Control Systems of Troy, Mich., offers the tolerance analysis tool 3DCS Variation Analyst, which lets users analyze the relationship between their parts, and track part sources. The software simulates both part and process variation, meaning engineers can analyze their manufacturing process and how it affects the assembly of the product and how it will function when produced.
Geometric Stackup is a tolerance stackup analysis software. It automatically assesses minimal and maximum tolerances on assemblies using worst-case analysis scnearios
几何堆叠与SolidWorks和PTC的Windchill集成，因此用户不需要留下这些系统以访问公差分析工具。
这些解决方案直接使用CAD几何形状。工程师不再需要从CAD模型手动输入名义值，以Excel电子表格，如“古老的日子”。例如，几何堆叠与SolidWorks和Windchill集成，因此这些系统的用户无需将它们留访问公差分析工具。
与许多类型的工程软件一样，今天的公差分析软件也为非专科论者设计。它很容易使用，学习曲线很短。
Another tool, called TolAnalyst is included with the SolidWorks premium package. The information is uses has been brought into the system by a tool called DimXpert that automatically includes manufacturing and inspection dimensions with tolerances based on data the engineer inputs.
实际上，Dimxpert包含在所有SolidWorks包中。有了它，用户可以将曲面作为数据输入。结果是根据ASME Y14.41-2003和ISO 16792：2006的要求，尺寸和公差定义。然后，具有托纳曲面的用户可以对组装进行堆栈分析。
So why is tolerance analysis important? A Sigmatrix specialist offers an example.
由于电子设备变得更小，更密集地包装，重要性加剧了更精确地了解制造变化和设计公差的相互作用。
这对其他行业也是如此。同样，在飞机，汽车和医疗设备行业中，责任继续增长，因此公司需要更准确地理解可能导致失败。
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