bill of materials

Introduction:

Bill of Materials (BOM) is a technical document that describes the product composition of an enterprise. In the processing capital industry, it represents the total assembly, sub-assembly, structural relationship between components, parts and raw materials, and the required quantity of products. In the chemical, pharmaceutical and food industries, product ingredients describe the main raw materials, intermediates, auxiliary materials, their formulas and required quantities. BOM is a product composition represented by charts rather than data tables, and it is an important control file in the process of calculating MRP in MRPII system.

Basic information:

1. List of all subassemblies, middleware, parts and raw materials that make up the parent assembly, including the quantity of each subassembly required for assembly. The bill of materials, together with the master production plan, arranges the distribution of materials in the warehouse, the production in the workshop and the types and quantities of parts to be purchased. Bill of materials can be described in many ways, such as single-layer method, indentation method, modular method, pause method, matrix method, cost method and so on. In some industrial fields, it may be called "formula", "element table" or other names.

2. The bill of materials is the core document of the manufacturing enterprise, which is used in the activities of all departments. According to different uses or characteristics, the bill of materials has many forms, such as single-level BOM, multipolar BOM, planned percentage BOM, modular BOM, manufacturing BOM and virtual BOM.

Definition:

1. BOM (bill of materials) in a narrow sense is usually called "bill of materials", which means product structure. It only describes the simple decomposition of the physical structure of matter according to certain division rules, and describes the physical composition of matter. Generally, levels are divided and described according to functions.

Second, BOM in a broad sense is a combination of product structure and process flow, which are inseparable. It is of no practical significance to talk about product structure without technological process. In order to describe a manufactured product objectively and scientifically through BOM, we must start with the manufacturing process to accurately describe and reflect the product structure.

Formula:

BOM = Routing (= Operation Collection) (= Work Center Collection)+? Equipment and personnel in the work center+product structure (product. Structure)+cost information of materials.