This static aspect is represented in the product/service tree. For example, a complex product often contains several modules, each of which has various component parts. Each of these elements can be understood as a product or service.
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The purpose of the product tree is to analyze the composition of products in public administration. This model essentially corresponds to the product/service tree, but does not provide the option of modeling replacement products. The product tree is located at the requirements definition level of the product/service view.
Перевод Иерархическая структура продукта.