是否补充Parts'痷PCB原型便宜? 获得引用前的5个条件

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製造業サプライチェーン研究所 2026年10月10日 17:35 When requesting a prototype for PCB assembly, 'Since I don't have to buy the parts, the quote should be cheaper by that amount' However, in the actual practice of PCB assembly, it is not that simple. This time, I will organize what you should check before choosing to supply parts for PCB assembly prototyping, including the 'work on the receiving end'. While you can reduce parts procurement costs, the total amount is not necessarily cheaper. The reason is that even if you supply the parts, the manufacturer must: This is where you want to change your way of thinking a little at the beginning. 'who prepares the parts to a state where they can be assembled' If you have already secured hard-to-get parts, you can reduce waiting time for procurement. You can manage designated suppliers and lots on the ordering side. There is also a method of supplying only special parts and leaving general parts to the assembly company. On the other hand, depending on the supply method, the receiving work on the assembly company side increases. For example, imagine a set of parts for a prototype arrives in a cardboard box. You don't know if the required quantity matches the actual quantity. In this state, verification work is required before assembly. If these are organized in a way that is easy to understand, it becomes easier for the receiving side to make decisions. In fact, looking at the public information of various EMS companies, it is common practice to proceed to production only after confirming the quantity and correspondence with the BOM for customer-supplied items. sierraassembly.com In other words, what can be reduced by supplying parts is mainly the 'work of purchasing parts and the material costs'. It does not automatically eliminate tasks like receiving, verification, and inventory management. When requesting a quote with customer-supplied parts, it will speed up the process if you confirm at least the following five points. Whether it is full supply, partial supply, or in-house procurement How many units will be supplied relative to the required quantity? In what packaging format will they be provided—reels, trays, sticks, or loose parts? For example, supplying only expensive CPUs and specialized ICs. Resistors, capacitors, and connectors are procured by the assembly company. This method can sometimes help balance material costs and management burdens. it is easier for the assembly company to make a decision if you specify One thing to be especially careful about is supplying the 'exact required quantity'. Since the required spare quantity varies depending on the part shape, assembly method, and the assembly company's equipment, it cannot be uniformly determined that Some EMS providers actually set specific conditions for supplied quantities and overage quantities. MacroFab Therefore, it is safer to confirm the required supply quantity at the quotation stage rather than having the ordering party decide on their own that Especially with expensive ICs, there is a difference in perspective: The assembly side does not want to stop the line due to shortages. This is a point where conditions should be aligned before discussing price. This is a point where conditions should be aligned before discussing price. This is a point where conditions should be aligned before discussing price. This is a point where conditions should be aligned before discussing price. Depending on the part, it may be better to check its storage and opened status. A typical example is surface-mount components that have a Moisture Sensitivity Level, known as MSL. MSL is related to factors such as the time allowed between opening the dry pack and assembly. Texas Instruments also explains that the floor life after opening a dry pack differs depending on the MSL. Texas Instruments 'I have 100 ICs purchased a long time ago in the office, so I will supply them,' which are details you should communica