I have experienced the careers of aerospace research institutes, state-owned enterprises, and private enterprises, and the knowledge of scientific research, small businesses, and medium-sized enterprises. From an ignorant and fearless student to an electronic designer, from an engineer to a technical manager, this may It is the road that many electronic engineers have designed for themselves. I have written the misunderstandings of the thoughts I have experienced for your reference. In order to make the teachers and sisters take the road on the starting line.
When designing, use standard parts and try not to customize them. The problem that customization will bring is that the supplier has insufficient investment in material quality control of small batches of goods, which is easy to produce material quality problems.
Don't mess with the goods, the result of random picking of goods in the retail market of electronic components is that the batch stability of the products is poor, the seller's purchase channels are relatively loose, the material control is relatively poor, and the savvy technicians are in batches. After production, the board is often distracted.
Don't make a decision easily, make a decision and don't change it easily. After the batch comes up, any change made will bring a lot of problems. The board is upgraded. If the boss sells it, don’t leave the maintenance board. Can the new board be used instead of the boss? How to deal with a lot of old board materials, how to do semi-finished products on the production line, a change will bring a series of problems. The new one is easy to ignore this point. When the card is tight, it complains that the process control will suppress the passion of the first-time job. I left the job that year. Now I understand it. I am ashamed of the behavior of the year. I hope that my boss can forgive a young man. The smashing. Some people will ask, "Would you like to change the problem?" The answer is "maybe". Some problems may be that they need to be temporarily retained. The problems that may be caused by it change are much higher than the benefits of solving it. So don't decide easily, don't change it easily if you decide. Of course, if the key performance indicators and safety indicators do not match, the change must also be changed.
To reduce the type of device, for example, to do a board requires 5 devices, giving you 10 hours, the experimental research time of each device is 2 hours, if 10 devices are used on this board, then the average is The experimental study time of the device is 1 hour, I don't believe it, 1 hour of experimental research can be more than 2 hours of experimental research? Some people may say that this device is enough for 1 hour, 2 hours is a waste, then you can use 5 kinds of devices to make the extra 5 hours sleep better, and save time, no need to draw on the snake Feet. There are fewer types of devices, such as purchasing and purchasing, and the difficulty of dealing with suppliers. Orders, payment, delivery, delivery, etc. will save trouble, and these do not require technical staff to pay more.
Can also reduce the inventory type, inventory must be more appropriate, 5.1 resistance / 10 resistance, use two, each 50, you need to set a total of 60 (considering loss, not to open the sale, then have 100) , the inventory is 120, if the two parallels of 10 constitute 5.1, the equivalent of 150, 160 is enough; the order saves one, the possibility of error is less, some people will say, then you have used a few more Ten resistors, what I said is that my example was not well done at the time. It’s not that this idea is not good. Look around you. There are always suitable examples to illustrate my point of view. Supplementary supplement. In addition, how can we not calculate the types of parts on the field maintenance belt and increase the convenience, in case of a certain type of out-of-stock, the risk avoidance that cannot be supplied, and the large-scale reduction of the procurement cost?
Reduce the number of devices, product reliability = A1 * A2 * A3 * A4 * A5 *. . . (An stands for the reliability of each device). Note that no An is greater than or equal to 1. If one more device is used, the reliability is reduced. Does this formula indicate the problem, and the device with high integration is used, and the temperature is stable. A good device can reduce the type of device and increase the reliability. Young people can do this. It is not for everyone, but the integration is high, the design is relatively simple, and the analog circuit is a discrete component. High youth is getting less and less.
Try to choose the device that the company is using. If you choose a device that the company uses more, at least there are many people who are familiar with the device inside the company. There are many people who can ask for advice. Because it is used much, it is found that the defect of the device will also be The more defects that are discovered are good for technology, just like looking at beautiful women on the street, only seeing her embarrassing side, the ghost knows whether she can do housework or watery poppies. When you see too many negative factors in a thing, you should not escape it, you should be closer to it, because deep understanding can make you avoid many problems. In addition, the company has a library, but also saved the errands to buy.
The level of electronic technology is not in the type of design tools and chips you use. When I interview engineers, I often want to engage in ARM. Engage in DSP, I feel that the MCU and 4000 series of gate circuit chips lack the advanced technology. This is a big mistake. The advanced nature of the technology does not depend on the quality of the tools. You drive the BMW faster than I drive the summer calendar. It does not prove that your driving skills are higher than me. The one-sided pursuit of the advanced technology of electronic technology will reduce the technical level of the engineers themselves. The driver of the small face is definitely driving a car higher than the driving level of your car. The level of electronic technology design depends on the basic skills of the technology. Basic functions include engineering calculations, reliability, electromagnetic compatibility design, basic principles and application knowledge of electronic devices, product knowledge, and so on.
These are some of the points I have had, and I have been confirmed by myself. I only hope that I can help new people. Remember a core content: solid basic skills, diligent practice, and correct thinking are the three basic elements of success.
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