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Several concepts are related to the subject of product structure modeling. All these concepts are discussed in this section. These concepts are divided into two main aspects. First the product breakdown is discussed which involves all the physical aspects of a [[Product (business)|product]]. Second, different views at the product structure are indicated.
[[Image:Product_structure_modeling_meta-data_model1.gif|right|thumb|300px|Figure 1: product structure concepts]]Figure 1 illustrates the concepts that are important to the structure of a [[Product (business)|product]]. This is a [[Meta-modeling technique|meta-data model]], which can be used for modeling the instances in a specific case of product structuring.
The core of the product structure is illustrated by the product components (ITEMS) and their RELATIONSHIPS. Thus, this involves the linking between ITEMS related to the [[Product (business)|product]].
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Due to differentiation and variation of items several concepts must be indicated into the product breakdown structure. Three concepts are involved in this differentiation, namely ALTERNATIVES, VARIANTS and REVISIONS. An ALTERNATIVE of an ITEM is considered as a substitute for that particular item, whereas a VARIANT is another option of an item which the consumer can choose. When an error occurs at a part or subassembly, it needs to be revised. This revision indicates the change history of the ITEM.
Product structure views are made upon several activity domains within the company. Due to the fact not everyone in the company has to have a detailed overview of the product several components with their attributes can be extracted.
When the MASTER STRUCTURE is made out of the several items of the product assembly, multiple views can be made upon this MASTER STRUCTURE. Thus this MASTER STRUCTURE contains every item in detail, which is important to the ASSEMBLY of the product.[[Image:Product_structure_modeling_meta-data_model2.gif|centre|thumb|500px|Figure 2: Different product structure views]]
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