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What is PCB BOM?

 PCB production involves a variety of raw materials, and PCB assembly needs to be carried out before actual production starts. How to determine the raw material requirements of PCB? The bill of materials (BOM) is the answer. A proper PCB component material list enables you to understand the exact components and materials required, as well as their brand, quantity, size and other details. Generally, in the case of PCB assembly, the BOM includes a list of Electronic connectors, Electronic Components, Electronic Resistor and Capacitor, and circuit requirements.

What is a bill of materials (BOM)?
A bill of materials (BOM) is a list of raw materials, components, and parts required to manufacture a specific end product. It mainly includes part number, name and quantity. It may also have the name of the manufacturer or supplier, other function columns, and a comment section. This is the key link between the customer and the manufacturer, and it provides detailed information about the procurement item. If you want to produce products within your organization, you can also provide them to internal departments.
Why is BOM important for PCB assembly?
Designing a PCB and then assembling many PCBs is very complicated. Therefore, it is very important that you fill in the information accurately. Here are some reasons for the importance of BOM:
1. The list is very convenient, so you fully know the materials you have, the quantity, and the remaining parts you need.
2. It also estimates the number of employees required for a specific assembly based on the purchased parts.
3. BOM helps correct planning and smooth operation.
4. BOM is needed for review, it helps to track the purchased parts and the available parts in inventory.
5. It is very important to accurately obtain the parts you want or those made by a specific manufacturer.
6. If it is not available, you can discuss and provide other options immediately.
Factors to consider when making BOM
If you receive an order for 50 PCB components from a consumer electronics manufacturer, you need to consider the following points when making a BOM:
1. It is not a good idea to consider the full quantity you think you need (50 PCB components at a time).
2. Instead, consider a PCB component, find out the type of PCB and the required components, and list the detailed information of only one component.
3. Let your team of engineers figure out all the parts needed.
4. Send the list to your customers for verification.
5. Almost always, you may need multiple BOMs.
6. After final discussion with your team and customers, determine the BOM.
7. The BOM must answer the "when", "what" and "how" questions related to the project is very important.
Therefore, never make a BOM hastily, because it is easy to miss some parts or mention the wrong quantity. This will result in a large number of back and forth mails and wasted production time. Most companies provide the BOM format, and it is easy to fill out. However, in addition to the BOM, it is essential that your PCB components must be accurate and PCBA test functions are good. Therefore, it is very important to deal with reliable PCB component manufacturers and service providers.