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Model-based definition (MBD), sometimes digital product definition, is the practice of using 3D models (such as solid models, 3D PMI and associated metadata) within 3D CAD software to define (provide specifications for) individual components and product assemblies. The types of information included are geometric dimensioning and tolerancing (GD&T), component level materials, assembly level bills of materials, engineering configurations, design intent, etc. By contrast, other methodologies have historically required accompanying use of 2D engineering drawings to provide such details.[1]

Use of the 3D digital data set[edit]

Modern 3D CAD applications allow for the insertion of engineering information such as dimensions, GD&T, notes and other product details within the 3D digital data set for components and assemblies. MBD uses such capabilities to establish the 3D digital data set as the source of these specifications and design authority for the product. The 3D digital data set may contain enough information to manufacture and inspect product without the need for engineering drawings. Engineering drawings have traditionally contained such information.[2]

In many instances, use of some information from 3D digital data set (e.g., the solid model) allows for rapid prototyping of product via various processes, such as 3D printing. A manufacturer may be able to feed 3D digital data directly to manufacturing devices such as CNC machines to manufacture final product.


In 2003, ASME published the ASME Y14.41-2003 Digital Product Definition Data Practices, which was revised in 2012 as ASME Y14.41-2012. The standard provides for the use of many MBD aspects, such as GD&T display and other annotation behaviors within the solid model. ISO-16792:2006 standardizes MBD within the ISO standards, sharing many similarities with the ASME standard. Other standards, such as ISO 1101:2004 and of AS9100 also make use of MBD.

In 2013, the United States Department of Defense released MIL-STD-31000 Revision A to codify the use of MBD as a requirement for technical data packages (TDP).

See also[edit]


  1. ^ "MIL-STD-31000 Rev A", p36, 26 February 2013. Retrieved on 23 April 2015.
  2. ^ Thilmany, Jean, "Digital Tolerance", "MBD is a method of annotating computer-aided design models with geometric and tolerancing information that allows engineers to draw directly onto a 3-D model.", ASME.org, March 2011. Retrieved on 23 April 2015.

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Model-based_definition — Please support Wikipedia.
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563 news items

ETMM Online

ETMM Online
Mon, 10 Aug 2015 01:15:00 -0700

USA – Dassault Systèmes has announced the launch of Solidworks Model Based Definition (MBD), a drawingless manufacturing application. According to the supplier, Solidworks MBD provides engineers with a 3D tool for model-based design that improves ...
Ten Links
Wed, 02 Sep 2015 20:45:00 -0700

As further confirmation that Anark Corp. is the leader in the deployment of true production quality 3D MBD (model based definition) data to the downstream consumers of that data, Anark has developed a unique, innovative and powerful collaboration ...

MCADCafe (press release)

MCADCafe (press release)
Fri, 04 Sep 2015 03:41:15 -0700

Richmond Hill, ON, Canada September 3, 2015 – Origin International Inc. is pleased to announce CheckMate MBD Functionality for SOLIDWORKS. Model Based Definition (MBD) comes of age with the emphasis of engineering defining the GD&T to meet ...
Manufacturing & Technology News
Thu, 27 Aug 2015 21:24:34 -0700

And we have implemented innovative ways to achieve seamless and repeatable production, such as using 3-D model-based definition that allows us to work on new configurations of the aircraft." The opportunity for global sales is founded on the ...

Quality Magazine

Quality Magazine
Sun, 01 Mar 2015 21:16:22 -0800

While manufacturers have applied model-based definition to product definition for some time, they have only recently applied it as a quality assurance process. Measurement_sl1 A graphical close-up of an automatically generated part program, based upon ...

EngineeringSpot (Blog)

EngineeringSpot (Blog)
Tue, 16 Jun 2015 03:12:34 -0700

So ging es mir mit der neuen Pressemitteilung von SolidWorks zum Modul Model Based Definition (MBD). Immerhin ein guter Grund, sich noch einmal tiefer damit zu befassen – immerhin hat MBD das Potential, den Produktdefinitionsprozess an ...
Quality Magazine
Tue, 08 Nov 2011 12:52:18 -0800

Take model based definition (MBD), a term and methodology long tossed around by software developers and the aerospace industry. Surprisingly, there is significant activity in this area, and genuine value this technology can bring to the manufacturing ...


Fri, 06 Mar 2015 01:40:14 -0800

Define PMI directly in 3D-1510 Společnost Dassault Systèmes představila bezvýkresovou výrobní aplikaci Solidworks Model Based Definition (MBD). Ta poskytuje konstruktérům 3D nástroj k vytváření modelů, zlepšuje technickou komunikaci, zrychluje ...

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