Nokia Speakers Md-8
The process of mobile phone design and manufacture
The process of mobile phone design and manufacture
Author: Steven Jiang (Shenzhen Kenah Technology Co., Ltd.)
Time: 2009-5-17 Transshipment Forbidden
Do you want to know the process of mobile phone design and manufacture?
Today, I try to introduce the mobile phone design process and department relation in the design house. And then talk about the test before the mobile phone on the market.
First, mobile phone design process
Generally speaking, the design house has six departments, the six departments as follow:
ID?MD?HW?SW?PM?Sourcing?QA?
1, ID (Industry Design) Industrial Design
Including the appearance of mobile phones, material feature, hand-suspicion, color match, the realization of the main interface and the design of color and so on.
For example, Motorola “Ming” transparent clamshell, the Nokia 7610′s circular-shaped appearance, Sony Ericsson W550’s orange color, Nokia 5800’s touch function and the Motorola R1 revolving-slide function. The user’s experience and special feelings belong to the mobile phone industrial design. The industrial design of mobile phone is particularly vital, because the success or best-selling of mobile phone depends on the Industry Design.
2, MD (Mechanical Design) structural design
MD refers to the housing (face A and back B), the camera position and the fixed way, the connecting linking the battery and the mainboard, the thickness of mobile phone, If it is a slide phone, how to slide up and how to achieve auto-up shells, and the agreement of how to plug in and take off the SIM card. All of these are the areas of Mechanical design of mobile phones.
It is necessary to know the Material and the craft to the mobile phone designer.
The thickness (just 13.90mm) of the Motorola V3 leads the fashionable trend. The sales point is the Ultra-thin. The housing of V3 uses the advanced aero metal. It can be said that the success of the V3 depend on the choice of the special shell material.
Speaking the vital of the MD, a name said he can fell the housing shaking when the Ultra-thin slide phone calling or answering. The bug come from the MD design, because the housing is very thin, the housing and speaker make out the resonance.
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And the Motorola R1 and Nokia 5800 are the represents of the successful combination character ID and special MD.
3. Hardware designs include the circuit design and antenna design. And it is vital that HW and MD should keep communication.
MD required the phone has a thin shell, so the first thing is that design a thin circuit. Meanwhile HW required the MD leave a huge black space for the antenna, and there is an enough distance linking the antenna and the battery. In addition, HW required the ID do not place the metal parts close the antenna and so on. It is evident that the cost of a mobile phone which has an internal antenna is higher than the external antenna mobile phone. The main factors is the antenna design, the material required, design of the circuit and the cost of the production, all of the terms lead to the higher cost than the external antenna mobile phone.
Usually, the MD design engineer and the ID design engineer have an argument. MD said ID is just a painter, to paint something which can’t make out. And ID said MD is clumsy, the MD can’t be with you the thought of ID department, can’t design out the suitable MD to coordinate with the ID design. So the mobile phone is not well loved and has no the excellent sales.
On this account, it is necessary that all of the department will gather together to analyze and judge the feasibility of the ID department thought. A excellent ID plot has a creative, has feasibility on MD, and the most vital is that the consumer accept the ID, Nokia 8800 and Motorola V3 are the samples.
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In additional, sometimes, there is an argument linking the HW and ID, for example, ID like the metal Ornamental on the housing. But the metal parts will affect the antenna design and lead to the static problem to endanger the security of the main-board. The metal parts lead to the more hard to avoid the signal shield and the static problem. So it needs to develop the new material to meet the ID requirements. The Nokia 8800 is a excellent example, a significance of the metals, without affecting the antenna’s reception.
4. SW (Software) Software Design
Relatively speaking, SW is more easily be with you by everyone, due to the popularity of the computer, so that we can maximize the various kinds of software. For example cell phone user interface develop—the mobile phone nine operating menu. This scope belong the SW design.
SW work is to design the interface, and test the operability of the interface. SW test is very complicated, and there are copious bits and pieces. SW test is not just in the search for Bug, consistency tests and compatibility tests are very vital bits and pieces. in the current “content-based” information age, software is the final behind-the-scenes mainstay for a mobile phone. The driver of hardware was performed by the software. So there are many conflicts linking the SW and HW not less than the other departments. On this account, they need a PM (Project Management) to coordinate and management. Next we talk about he PM.
5, PM (Project Management) Project Management
The huge mobile phone company has perfect and clear division of labor in fantastic detail, such as TPM (Technology Of Project Management), that is the specialized control technology PM, while the ordinary PM, only control the progress of project and coordinate the relations linking the departments. Usually, the PM department continue living in the huge company which has themselves design, production and sales.
6, Sourcing Resources Development
Resource development of staff to have to keep digging new resources, such as new materials, new cell phone components, testing equipment. They must make sure that the production line has all of the production materials, when the phone started examination production.
There is a LRIP(Low Rate Initial Production) before to volume production. It is not only to inspect the hardware / software maturity, but also to inspect the manufacturing technique and production test technology. There are certain models can not pass the last procedure. So the “new” mobile phone will not appear on the market. It is a fantastic loss, because all of the investment of financial and creature can not get the payback or return.
7, QA (Feature Assurance) Feature Supervision
QA departments are responsible for feature assurance in the whole process, supervise if the development process to meet the scheduled process, to make sure that the project can be produced. there are many new projects to be abandoned because the process have no considering the mass production.
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The production of a cell phone is not in the laboratory experiments as simple as. It is not an simple thing to make sure the feature of every product when to mass produce. It is completely different things to produce one cell phone sample and to mass produce the 100,000 mobile phones in production line.
For example: all of the food which comes from Chinese restaurant is just samples, and McDonald’s is products, so McDonald could have done a lot. But so far, the Chinese restaurant has not yet been achieved as the size of McDonald’s, the essential reason is that Mc Donald has a set of rule to instruct how to make a product, and Chinese restaurant cook just depend on the experience or the suspicion to produce a food.
So all of mobile phone design house established a process to prevent the emergence of many design and development of the mobile phone does not come into production.
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