{"id":12472,"date":"2025-10-14T21:10:19","date_gmt":"2025-10-14T19:10:19","guid":{"rendered":"https:\/\/sxe-consulting.com\/?page_id=12472"},"modified":"2025-10-14T21:10:19","modified_gmt":"2025-10-14T19:10:19","slug":"nomenclature-definition","status":"publish","type":"page","link":"https:\/\/sxe-consulting.com\/en\/glossaire-industriel\/nomenclature-definition\/","title":{"rendered":"Bill of Materials (BOM)"},"content":{"rendered":"

Visit Bill of Materials (BOM)<\/strong> is a structured, hierarchical document that exhaustively lists all the components, sub-assemblies, raw parts and raw materials needed to manufacture a finished product, including the exact quantities required.<\/p>\n

<\/p>\n

In-depth definition :<\/strong> Nomenclature is, in the literal sense, the manufacturing recipe<\/strong> of the product. It is created during the\u2019Industrialisation<\/strong> by the design office or Methods<\/strong> and is a key part of the Manufacturing file<\/strong>. Its tree structure (often referred to as \u201cBOM explosion\u201d) defines the parent-child relationships between the different assembly levels. Its accuracy is vital, as the slightest error in quantities or part numbers has a direct impact on costing, purchasing planning and production efficiency by Series Production<\/strong>.<\/p>\n

BOM's Essential Functions for Industrial Performance<\/strong><\/h3>\n

For the\u2019Operational Excellence<\/strong> and the Industrial Engineering<\/strong>, The BOM is a multifunctional tool and a critical control point:<\/p>\n

A. Planning and Logistics (MRP)<\/strong><\/h3>\n
    \n
  • Material Requirements Planning (MRP) :<\/strong> The BOM is the fundamental input to the system MRP (Material Requirements Planning)<\/strong>. MRP uses the BOM to \u201cbreak down\u201d demand for finished products into all the necessary components and raw materials, thus determining precisely what needs to be purchased or manufactured in-house, and when.<\/li>\n
  • Inventory management :<\/strong> It is essential for tracking inventory movements and assessing the cost of work-in-progress (WIP<\/em>) and finished products in the\u2019ERP (Enterprise Resource Planning)<\/strong>. A fair BOM is the condition sine qua non<\/em> to avoid waste (Muda<\/em>) due to overstocking or breakage.<\/li>\n<\/ul>\n

    B. Costs and Finance<\/strong><\/h3>\n
      \n
    • Calculating the Cost of Goods Sold :<\/strong> The BOM is used in finance to calculate the standard theoretical cost of a product. By multiplying the quantity of each component by its unit cost, we obtain the material value of the finished product. KPI<\/strong> essential for operating margin.<\/li>\n
    • Cost control :<\/strong> Analysis of the BOM enables Industrial Engineering<\/strong> identify expensive components and work on simplifying them (using the DFMA<\/strong> - Design for Manufacturing and Assembly<\/em>) or reducing their quantity.<\/li>\n<\/ul>\n

      C. Execution and Quality (MES)<\/strong><\/h3>\n
        \n
      • Assembly instructions :<\/strong> It is the basis for all Work Instructions<\/strong> and kit preparation lists. It ensures that the right component is used in the right place at the right stage of the process. Manufacturing range<\/strong>.<\/li>\n
      • Traceability :<\/strong> Each line in the BOM is linked to a unique reference, enabling traceability<\/strong> of the component throughout the entire product life cycle, in particular via the MES (Manufacturing Execution System)<\/strong>.<\/li>\n<\/ul>\n

        The different types of nomenclature<\/strong><\/h3>\n

        Depending on the product's function or point in its life cycle, a distinction is made between :<\/p>\n

          \n
        1. Engineering BOM (EBOM<\/em>) :<\/strong> Reflects product design as defined by R&D.<\/li>\n
        2. Manufacturing BOM (MBOM<\/em>) :<\/strong> Represents the structure of the product as it is actually manufactured. It includes consumables (glues, paint), temporary assembly subassemblies and the way in which the Manufacturing range<\/strong> uses the components. It is the MBOM that is used by the MY<\/strong>.<\/li>\n
        3. Sales BOM (SBOM<\/em>) :<\/strong> Describes the final product as the customer receives it, often used for configurable products with different options.<\/li>\n<\/ol>\n

          BOM and Digital Transformation (Industry 4.0)<\/strong><\/h3>\n

          In an environment of Industrial Digitization<\/strong>, the BOM is a dynamic element:<\/p>\n

            \n
          • Electronic management :<\/strong> It is managed by a PLM (Product Lifecycle Management)<\/strong> or directly in the\u2019ERP<\/strong>, ensuring that only the most up-to-date version (often linked to a Digital Twin<\/strong> of the product) is used by the production and purchasing departments.<\/li>\n
          • Variant complexity :<\/strong> Digital tools make it possible to manage the complexity of ultra-customized products (wide variety of part numbers) using modular BOMs and automatic configuration rules.<\/li>\n<\/ul>\n

            In conclusion, the Parts list<\/strong> is the foundation of the company's technical data. Its rigor is the expression of maturity in Industrial Engineering<\/strong> of an organization. Ensuring its accuracy is the first step towards efficient, cost-effective planning and execution.<\/p>\n

            <\/p>","protected":false},"excerpt":{"rendered":"

            La Nomenclature (Bill of Materials – BOM) est un document structur\u00e9 et hi\u00e9rarchique qui liste de mani\u00e8re exhaustive tous les composants, sous-ensembles, pi\u00e8ces brutes et mati\u00e8res premi\u00e8res n\u00e9cessaires pour fabriquer un produit fini, y compris les quantit\u00e9s exactes requises.<\/p>","protected":false},"author":1,"featured_media":0,"parent":12324,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"definition":[99],"class_list":["post-12472","page","type-page","status-publish","hentry","definition-definition"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/comments?post=12472"}],"version-history":[{"count":0,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12472\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12324"}],"wp:attachment":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/media?parent=12472"}],"wp:term":[{"taxonomy":"definition","embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/definition?post=12472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}