Product model was categorized into product model for unit product model for CAx, virtual product model for digital prototyping and virtual product model for life cycle. The product model technology was summarized.

• 将产品模型分为面向CAx技术的单元产品模型、面向数字原型的虚拟产品模型和面向全生命周期虚拟产品模型，并对产品模型技术进行综述。