In this post I would like to introduce an all embracing view regarding the purpose of a Digital Mockup or DMU. When you research the topic there are different opinions what a DMU is. It depends where you come from. The AutoVue’s view is that the DMU is the lightweight product representation derived from a 3D CAD model. If you are a vendor of 3D CAD, then DMU is the source product representation created with the CAD application. Wikipedia I believe is pretty close: Digital MockUp or DMU is a concept that allows the description of a product, usually in 3D…. although what is meant with ‘concept’.

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According to Wikipedia EAM is: the whole life optimal management of the physical assets to maximize value. It covers such things as the design, construction, commissioning, operations, maintenance and decommissioning/replacement of plant, equipment and facilities. “Enterprise” refers to the management of the assets across departments, locations, facilities and, in some cases business units.

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To develop a product and ultimately maintain an asset you need to manage a number of product definitions going through the lifecycle from inception to disposal. Some product definitions are critical as part of EAM/MRO.
In this post I’ll talk about product definitions in general an then specifically those that are input to EAM/MRO. Literature may refer to these product definitions as BOM’s. I oppose this generalization as there is more ‘bom to a bom’. A ‘decomposition’ would be more appropriate and this decomposition consists of Assemblies. I once referred to these as bom-lets, in fact that is exactly what it is, small structures of sub-assemblies with components.

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