产品研发人员根据需求进行产品设计，得到产品的相关数据和三维模型，并进行管理优化和改进，直到最终确定产品的设计方案。主要包括产品设计、工艺规划、虚拟试验验证三个阶段。
其中产品设计重点建设数字化产品模型或原理样机的构建条件和产品性能与功能的数字化验证手段，主要包括计算机辅助设计（CAD），计算机辅助工程分析（CAE），计算机辅助操作（CAO，包括知识库、基础数据库和专家系统等）三个方面条件。
工艺规划重点建设计算机辅助的产品工艺规划和工装设计、计算机辅助的工艺过程动态仿真与分析优化、专用工艺装备的优化设计等条件，主要包括计算机辅助工艺规划（CAPP），计算机辅助工装设计，逆向工程（RE，如快速成型系统），数字化工艺仿真与验证（包括动态装配仿真、装配过程仿真、人机过程仿真、焊接过程仿真、冲压过程仿真、机加工过程仿真、装配精度和公差仿真等），以及生产线布局和仿真、工位布局和仿真、物流仿真等。
虚拟试验验证重点建立虚拟测试和验证（VT&E）条件，即建立一个以虚拟样机为标准的数字化环境来模拟真实的物理试验过程，并进行一次或多次的虚拟试验测试，并通过试验得到的数据做合理分析，以考核、评价复杂产品的性能，进而为实物验证提供坚实的支撑；以及建立试验数据管理系统（TDM）用于虚拟试验数据和真实试验数据管理等。
翻译：
Product R&D personnel design products according to the needs, get the relevant data and three-dimensional models of products, and optimize and improve management until the final product design scheme is determined. It mainly includes three stages: product design, process planning and virtual test verification.
Among them, the product design focuses on the construction conditions of digital product model or principle prototype and the digital verification means of product performance and function, mainly including computer-aided design (CAD), computer-aided engineering analysis (CAE), computer-aided operation (CAO, including knowledge base, basic database and expert system).
Process planning focuses on the construction of computer-aided product process planning and tooling design, computer-aided process dynamic simulation and analysis optimization, optimization design of special process equipment and other conditions, mainly including computer-aided process planning (CAPP), computer-aided tooling design, reverse engineering (RE, such as rapid prototyping system), Digital process simulation and verification (including dynamic assembly simulation, assembly process simulation, man-machine process simulation, welding process simulation, stamping process simulation, machining process simulation, assembly accuracy and tolerance simulation, etc.). As well as production line layout and simulation, station layout and simulation, logistics simulation, etc.
Virtual test verification focuses on the establishment of virtual test and verification (VT&E) conditions. That is, to establish a digital environment with virtual prototype as the standard to simulate the real physical test process, and conduct one or more virtual test tests, and make reasonable analysis through the test data to assess and evaluate the performance of complex products. So as to provide solid support for physical verification. The test data management system (TDM) is set up to manage virtual test data and real test data.
