I was teaching a data modeling class a few weeks back, and we were in the middle of building subject area models when one of the participants called me over to look at her manufacturing model. There was an entity called Production that represented the entire production process required to transform raw materials into finished products. Although data and process both need to be understood and validated for the complete requirements picture, process entities do not belong on a data model. This Production process entity will need to get replaced with entities such as Plant and Raw Material.


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