在汽车和供应商行业中，CAD数据是在不同的CAD系统中生成和处理的，其格式和结构并不总是兼容的。尽管有标准化的接口格式（VDAFS、IGES、STEP），但在某些情况下，流程链（内部和外部数据交换）中的数据流可能会受到阻碍。不同公司生成和结构化数据的方式不同，元素的范围和CAD系统的内部显示不同，数据的作者和收件人有不同的任务，这意味着需要大量的成本和精力才能使用；在极端情况下，这些数据根本不能使用。这也适用于在单个CAD系统中传输的流程链中的CAD数据。这是因为流程链中的不同处理步骤可以对这些数据应用不同的质量要求。Velidat是CATIA V5中的一个应用程序，它确保CATIA V5数据正式（组织数据质量）和几何（拓扑）正确。因此，验证程序在CATIA V5中执行任务，在CATIA V4中结合GII应用程序ENDCHK和CATIA V4中执行任务。可以检查以下文件类型：

    验证器旨在检查CATIA模型是否符合正式和几何设计指南，以便在早期阶段检测和消除质量缺陷。根据VDA建议4955/4对生成的CAD数据进行检查为这些标准。1.在标准的结构和指定方面，本VDA建议4955/4与SASIG提供的关于产品数据质量的全球有效指南（从2005年9月开始的第2.1版）相同。

    根据标准VW01059第6部分，在CATIA型号之前可以存储在大众集团。模型在存储之前必须在这个测试中被评为正常状态。为用户提供了此检查的适当标准检查配置文件；这些配置文件提供了合适的标准选择，可以使用验证程序进行检查，并符合VDA建议4955/4.1，他们还为标准设置了正确的参数值。为了减少处理模型所需的时间，并防止查询和投诉，CATIA数据的每个作者都应该在设计期间使用验证器进行定期检查。

In the automotive and supplier industry, CAD data are generated and processed in different CAD systems and in formats and structures that are not always compatible. The data flow in the process chains (internal and external data exchange) can be impeded in some cases in spite of standardised interface formats (VDAFS, IGES, STEP). Differences in the way data are generated and structured at different companies, in the range of elements, and in the internal display in CAD systems, and the fact that authors and recipients of data have different tasks, mean that a lot of cost and effort are required to process CAD data at downstream departments before they can be used; in extreme cases, such data cannot be used at all.

This also applies to CAD data in the process chain that are transferred within a single CAD system in the company’s format. This is because different processing steps in the process chain can apply different quality requirements for these data.

VALIDAT is an application in CATIA V5 that ensures that CATIA V5 data are formally (organisational data quality) and geometrically (topology) correct.

VALIDAT therefore performs tasks in CATIA V5 that were performed in CATIA V4 by a combination of the GII applications ENDCHK and VALIDAT.

The following file types can be checked:

    CATProduct

    CATPart

   CATDrawing

VALIDAT is designed to check compliance with the formal and geometric design guidelines for CATIA models in order to detect and remove defects in quality at an early stage. The generated CAD data are checked for these criteria according to VDA recommendation 4955/4. 1. In regard to the structure and designation of criteria, this VDA recommendation 4955/4 is identical to the globally valid guideline pro- vided by SASIG on product data quality (issue 2.1 from September 2005).

Parameter sets can be used to integrate company-specific specifications. In the Volkswagen Group, for example, it is necessary to perform such a check for part models (TM) and part drawings (TZ) according

to standard VW 01059, part 6, before a CATIA model can be stored in the of the Volkswagen Group.Models have to be rated OK in this test before being stored. The user is provided with appropriate standard check profiles for this check; these profiles provide a suitable selec- tion of criteria that can be checked using VALIDAT and that match VDA recommendation 4955/4. 1 and they also set the correct parameter values for the standard.

In order to reduce the time it takes to process models, and in order to prevent queries and complaints, every author of CATIA data should use VALIDAT to perform regular checks during the design period.