How to calculate the cost of circuit board

How to calculate the cost of circuit PCB board

The cost of circuit boards is generally calculated through different processes, different material processing and other comprehensive factors, and the quotation is generally calculated in square meters. Of course, the price of some special customized materials and processes will increase or decrease accordingly, which are all subject to cost accounting. Then, how to calculate the cost of PCB? Now let's share with you. Cost=material+labor+manufacturing expenses. What are the materials? The process of PCB is relatively long, and there is a lot of room to control the production cost. Production cost includes: raw material control, water and electricity control, scrap rate control, process control, etc.

1. Raw material control

For the same board, whoever can use the least materials to complete it will have the lowest production cost. To control the least materials is to control its rework rate and the waste rate of employees. Although many factories have PMC departments to limit the production of materials, this is a way to cure the symptoms but not the costs. If the materials are insufficient and the production cannot be stopped, they will be issued to them finally. To really solve the problem, it is necessary to start from the proficiency of employees The management ability and process of the supervisor are designed. A strict management system and reasonable operation mode will reduce many human errors. It is suggested that some key positions should be completed by experienced employees. For example: process designer, production director, MI writing engineer, etc!

2. Hydropower control

It is very important to make rational use of water and electricity, especially in the peak season when there is often a shortage of electricity. Many places adopt power limitation control. When the machine is not in use, it must be stopped, such as lamps, etching pullers, drilling/gongs and other equipment. Planned production and reasonable use of electricity can reduce large costs. It is recommended that the production planner should be proficient in the process flow, closely cooperate with the production and marketing departments, and communicate frequently to get timely information, so as to reasonably arrange the production plan!

3. Scrap rate control

It is indeed a pity that the scrap boards are scrapped. In particular, the sharp rise of copper boards in the market, the rise of materials and the decline of PCB profits will undoubtedly make the enterprise economy worse if the scrap rate is too high. How to control scrap rate! This requires us to find a better operating system and management system to tolerate the negligence of employees and the instability of materials In the process of controlling the scrap rate, we can control it from the following aspects: (1) Enhance employees' awareness, let them understand that circuit boards are valuable things, and they must be handled with care at any time. Don't let them feel that we are producing cheap boards or garbage boards, and naturally they will not be treated as treasures. Just as we require the board holding posture, they must hold the board edge with two hands, We do not say that this will bring benefits to the quality, but simply this gesture can make people feel the preciousness of this board! (2) QA MRB (scrap reviewer) is a very important person. He is responsible for judging whether the board should be scrapped. He must have a high sense of responsibility and be familiar with all processes. If the boards that can be saved are judged as scrapped, it is undoubtedly a waste. If the boards that cannot be saved are judged as qualified by him and continue to the next process, it will waste the raw materials of the subsequent process. (3) Constantly introduce new technologies and seek the most reasonable working mode to tolerate employees' mistakes. (4) Let every employee know the monthly scrap rate, and let them feel the benefits brought to them by the reduced scrap rate! Frequently summarize the reasons for scrapping and know how our boards are scrapped. A good PCB is based on the selection of materials and the need to do a good job in each process strictly and carefully, without carelessness. The material cost and process precision also determine the final quotation of PCBA.