Manufacturing process of mobile phone

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the manufacturing process of mobile phones generally goes through the following seven departments: ID, MD, HW, SW, PM, sourcing and QA
I. ID (instry
Design) industrial design
includes the design of mobile phone appearance, material, feel and color matching, the realization and color of main interface, etc
II. MD (
Design) structural design
selection of the front and rear shell of the mobile phone and the camera lens position of the mobile phone, the way of fixing, how to connect the battery and the thickness of the mobile phone. If it is a sliding mobile phone, how to slide it up, how to automatically pop it up, and how to insert and pull out the SIM card are all the aspects of mobile phone structure design. Cumbersome parts require MD staff to be very familiar with materials and processes
III. HW (hardware)
hardware design
hardware mainly designs circuits and antennas, and HW is to maintain regular communication with MD
IV. SW (software) software design
relatively speaking, SW is easier for everyone to understand. Due to the popularity of computers, we are exposed to a variety of software to the greatest extent. The mode of mobile phone operation interface and the realization of mobile phone nine official operation menu, which we often see, are all the scope of SW design
v. PM (project
) project management
the PMS of large-scale companies are divided very carefully. For example, TPM
(
of
Project
), that is, the PM that specializes in technology, while ordinary PM only manages the progress and coordination of the project. The PM department usually exists in companies that design, produce and sell their own mobile phones, I’m afraid everyone is familiar with the position of AM (account
manager). As an account manager, he puts forward requirements on behalf of customers internally and represents the overall image of the company externally, playing an indispensable bridge between the two
VI. sourcing resource development department
the employees of the resource development department constantly explore new resources, such as new materials, new mobile phone components, test equipment, etc. when the mobile phone starts trial production, they should ensure that all production materials needed on the production line are complete
VII. QA (quality
assurance) quality supervision
QA department undertakes the quality assurance of the whole process, urges whether the development process conforms to the predetermined process and ensures the producibility of the project. Many newly designed mobile phones have been abandoned because of some factors that cannot be produced
8. Mobile phone features:
1. Support banking business and some convenient services
2. The transfer payment function can be completed without online banking
3. Support multiple banks
4. Use of all UnionPay debit cards and credit cards
5. Multiple encryption to ensure security
6. Easy to operate and use.

I. design process of mobile phone & nbsp

with a simple explanation, general mobile phone design companies need to have six departments: ID, MD, HW, SW, PM, sourcing and QA& nbsp;

1. ID (instry design) Industrial Design & nbsp

includes the appearance, material, feel and color matching of the mobile phone, the realization and color design of the main interface& nbsp;

for example, the translucency of Motorola “Ming” flip, the circular arc appearance of Nokia 7610, the sunshine orange of Sony Ericsson W550, etc. These special feelings and experiences for users belong to the category of mobile phone industrial design. Whether a mobile phone can become a best-selling product, the industrial design of mobile phone is particularly important& nbsp;

2. MD (Design) structural design & nbsp

the selection of the front and rear shell of the mobile phone, the location of the camera lens of the mobile phone, the fixed method, how to connect the battery, and the thickness of the mobile phone. If it is a sliding mobile phone, how to slide it up, how to automatically pop it up, and how to insert and pull out the SIM card are all the aspects of mobile phone structure design. Cumbersome parts require MD staff to be very familiar with materials and processes& nbsp;

Motorola V3 has set off an upsurge in the mobile phone market with a thickness of 13.9mm. V3 mobile phone takes ultra-thin as its selling point. Because the material selection of its mobile phone shell is very key, the shell of V3 is made of aviation grade aluminum alloy with advanced technology. It can be said that the selection of special shell materials has achieved the success of v3& nbsp;

in addition, some users reported that when using some ultra-thin sliding cover mobile phones, they can always feel the left and right shaking of the front shell of the mobile phone when answering the phone, which is a problem in the structural design of the mobile phone. Because the shell of the mobile phone is too thin, the vibration of the speaker during the call is very easy to resonate with the body of the mobile phone& nbsp;

3. HW (hardware) hardware design & nbsp

hardware mainly designs circuits and antennas, while HW needs to maintain regular communication with MD& nbsp;

for example, MD requires thin, so the circuit should also be thin to work. At the same time, HW also requires the MD to place the antenna in a large area and far enough away from the battery. HW also requires the id not to place metal accessories near the antenna. It is conceivable that the manufacturing cost of a mobile phone with a built-in antenna will be 20-25% higher than that of a mobile phone with an external antenna. The main factor is the antenna design. The requirements of materials and circuits are higher on average& nbsp;

usually, structural designers (MD) and industrial designers (ID) have arguments. MD says that ID is a painter and draws something we can’t do, while ID says that MD is stupid and doesn’t do according to their design, so mobile phones don’t sell well. Therefore, before a new mobile phone is designed, all departments will review the design creativity of the ID department. A good ID must be an achievable creativity, and the customer experience must be very good. At that time, the ID of Motorola V70 was a good example of realizing creativity, and the response of the later market was also good. Although the creativity of Siemens Xelibri was also good and can be realized, it was a pity that the end customer didn’t feel good. Therefore, a really good idea should not only be good-looking, realizable, but also easy to use& nbsp;

in addition, HW will quarrel with ID. ID likes to decorate with metal, but metal will affect the design of antenna and easily generate static electricity. Therefore, HW will be very angry. ID /MD will develop new materials to meet the requirements of ID. The Nokia 8800 is a good example. It has a metallic feel without affecting the receiving capacity of the antenna& nbsp;

4. SW (software) software design & nbsp

relatively speaking, SW is easier for everyone to understand. Due to the popularity of computers, we have been exposed to a variety of software, modes of mobile phone operation interface, and the realization of mobile phone nine official operation menu, which we often see, are the scope of SW design& nbsp;

SW should fully consider the operability, humanization and beauty of the interface. SW Testing is very complex and numerous. SW Testing is not only looking for bugs. Consistency testing and compatibility testing are very important projects. In the current “content-based” information age, software is the ultimate behind the scenes pillar of mobile phones. The driver of hardware is software. I believe there will be no less conflict
between software and hardware engineers than other departments, This relationship goes around, so PM (project) project management is needed to coordinate& nbsp;

5. PM (project) project management & nbsp

the PMS of large-scale companies are divided very carefully. For example, TPM (of project), that is, PM specializing in technology, while ordinary PM only manages the progress of the project and coordinates the work. The PM department usually exists in companies that design, produce and sell their own machines. I’m afraid everyone is familiar with the position of AM (Account Manager). As an account manager, Internally, the company puts forward requirements on behalf of customers and externally represents the overall image of the company, which plays an indispensable bridge role between the two& nbsp;

6. Sourcing resource development department & nbsp

the staff of the resource development department constantly excavate new resources, such as new materials, new mobile phone components, test equipment, etc. when the mobile phone starts trial production, they should ensure that all production materials needed on the production line are complete& nbsp;

small batch trial production of mobile phones not only investigates the maturity of software /hardware, but also the production process and production test technology. If some mobile phones fail to pass this level at this stage, they will end in failure. Therefore, this newly designed mobile phone will not appear in the market, but the development funds and manpower invested will be paid, which is a great loss& nbsp;

7. QA (quality assurance) Quality Supervision & nbsp

QA department undertakes the work of quality assurance of the whole process, urges whether the development process conforms to the predetermined process and ensures the producibility of the project. Many newly designed mobile phones give up because of some factor that cannot be produced& nbsp;

producing a mobile phone is not as simple as doing experiments in the laboratory. Once it is produced, there are thousands of mobile phones. It is by no means easy to ensure the high quality of each product. Producing a sample of a mobile phone is completely different from producing 100000 mobile phones& nbsp;

for example: Chinese restaurants produce samples and McDonald’s makes products, so McDonald’s can do a lot. So far, it is a fact that Chinese restaurants have not achieved the scale of McDonald’s for the time being, so mobile phone design companies will establish many processes to prevent the situation that the designed and developed mobile phones can not be put into production& nbsp;

not only that, the successful listing of a mobile phone can sell well. It still needs close contact with mass mobile phone users, and it can succeed only through user feedback and rapid improvement& nbsp;

II. Little known mobile phone test items & nbsp

1. Stress test & nbsp

use the automatic test software to make 1000 calls to the mobile phone continuously to check whether the mobile phone will fail. If something goes wrong, the relevant software needs to be rewritten. So sometimes there are different software versions on the mobile phone. In fact, I tell you a secret. The more versions of the mobile phone, it can prove that the mobile phone was sold without sufficient testing before it was launched& nbsp;

2. Fall resistance test & nbsp

the drop resistance test is carried out by a special PRT reliability laboratory. The 0.5m micro drop test needs to be done 300 times /face (the mobile phone has six faces). The 2m drop test needs to be done once on each side. The mobile phone is also thrown to the desktop by imitating a real person, and the battery used by the mobile phone must pass through the height of at least 4m, impact and fall 100 times towards the ground without rupture& nbsp;

3. High /low temperature test & nbsp

test the adaptability of the mobile phone in different temperature environments. The low temperature is generally minus 20 ℃ and the high temperature is about 80 ℃& nbsp;

4. High humidity test & nbsp

use a special cabinet for drip test, imitating the sweating of real people

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