Model Based Enterprise - Model Based Definition : Definition and Approach
In the world of CAD, Model-Based Definition (MBD) is a system and set of techniques used to document a product using 3D data as completely as possible. The core of MBD is an annotated 3D model that contains 3D geometry, manufacturing information (PMI), metadata, and other design or manufacturing information. PMI includes dimensions, tolerances, roughness, notes, welding information, and other attributes. In addition to the annotated 3D model, 2D documents such as lists, diagrams, matrices, and other files and documents are gathered in a Technical Data Package (TDP). A TDP is a set of files or documents that contains all the information needed to completely define a product and its requirements.
The MBD approach is the next revolution in the CAD/CAM/CAE domain, where annotated 3D models and TDP 3D are used as a single source for all design information, eliminating the use of 2D drawings. When an MBD approach is implemented at the beginning of a product's lifecycle and reused throughout the company and its supplier chain, it enables rapid, homogeneous, and cost-effective development and deployment of products from conception to disposal. This environment is called Model-Based Enterprise (MBE).
MBE is the environment in which MBD represents the product definition or design authority. The switch from 2D drawings to a 3D model with annotations is not sufficient to justify the benefits of MBD. An MBE environment must be optimized to share the 3D data set throughout the enterprise and the supplier chain. An optimized and efficient 3D product lifecycle process, that satisfies the needs of all users, generates a lean environment with less waste. The error rates and rework are reduced, as is labor in the data and document creation process. The cost for printing and maintaining the paper archive is also considerably reduced.
However, many considerations need to be taken into account by an enterprise that is considering migrating from a 2D/3D environment to a 3D MBD environment. Key areas such as legacy data migration and MBD data reuse in the supply chain are often ignored but critical to a successful MBD implementation.
One of the key factors in the MBD approach is the development of new standards and processes for the creation of annotation in 3D models. Technical data packages must be in a format that is compatible with all CAD systems and all uses of the data set. For a model to be the single source for a part, it must be appropriate for the various partners in the chain, regardless of the CAD formats used.
Ensuring quality and original design intent in the model and TDP is also critical. For MBD to be faster and more efficient, all users sharing the model must receive the same information. This allows for collaboration without having to ask questions and without the risk of downstream manufacturing issues.
To implement a successful MBD environment, CAD Interop has a large range of interoperability solutions that can be deployed to identify and resolve these issues.
In conclusion, the MBD approach is the next revolution in the CAD/CAM/CAE domain, where annotated 3D models and TDP 3D are used as a single source for all design information, eliminating the use of 2D drawings. The MBD approach enables rapid, homogeneous, and cost-effective development and deployment of products from conception to disposal in an optimized and efficient 3D product lifecycle process that satisfies the needs of all users. However, many considerations need to be taken into account by an enterprise that is considering migrating from a 2D/3D environment to a 3D MBD environment, and CAD Interop has a large range of interoperability
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