通过对工艺信息实质内容的深入分析，提出一种能全面描述和表达工艺信息的三维工艺模型(Manufacturing process model, MPM)，该模型具有工艺过程信息的几何演进性和多视角性特点。模型通过定义MPM三元组，确立了工艺信息的过程性结构关系，可完整表达工艺信息的内在规律，有利于数字化工艺信息的产生与优化。同时，从便于工艺设计等下游后续过程使用工艺信息的角度，提出包括流、动态场景和快照表达模型在内的三维工艺模型的数字化多视角工艺信息表达框架(Manufacturing process as stream and snapshot, MPASS)。其中，流表达模型以制造活动过程之间的关系为组织形式对工艺活动的信息进行表达；动态场景表达则是从不同的对象视角进行投影，以灵活的形式对工艺信息进行组织和查看；快照表达利用静态对象几何和增量的方式，表达动态过程某一时间点的状态值和相关性。不同的表达数据可用于不同的后续制造与管理过程。

A digital three-dimensional manufacturing process model(MPM) is established based onprobing the essence of manufacturing process information. MPM is able to express the complete and comprehensive process information, and to present the geometric evolution of the product/part during manufacturing and the multi-view characteristics of the process. The MPM is defined in triples and the structural relationship of process information is addressed. MPM specifies the natural rule of process information and is conducive to process information generation and optimization. In order to facilitate the use of process information by downstream processes, a novel expression framework named MPASS (Manufacturing process as stream and snapshot) is proposed. MPASS comprises of process stream model, dynamic setting and snapshot. The framework could express the digital multi-view of process information in which stream model is used to express the process information organized in process activities; dynamic setting is the projection from different object perspectives in order to organize and view process information flexibly; and snapshot expresses the status value and the relevance of certain moment by using static object geometry and incremental method. Different expression data can be used for diverse subsequent manufacturing and management processes.