GB/T 5094.4-2005 Industrial systems, devices and equipment and industrial products - Structural principles and reference codes Part 4: Explanation of concepts
Some standard content:
National Standard of the People's Republic of China
GH/T 5094.4—2005/1EC 61346-4:1998 1985
Industrial systems, installations and equipment and industrial products-Structuring principles and reference codes
Part 4: Explanation of concepts
Industrial systems, installations and equipment and industrial products-Structuring principles and reference designilions-Part 4Liscussion of concepts
(IEC 61346-2:1998.IDT:
2005-03-03 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2005-08-01 Implementation
Or cited documents
Evolution History
1EC 60113-2:1071
3.3IFC:60750:1985
1FL: 61346-1.1406
Life cycle
"Ring-sun" life plan
Functional and performance aspects code (A)
Functional requirements standard FR1(13)
Position and risk reference code ()
Meanwhile, long-term point standard 1)
GB/T5094.4-2005/1KC61346-4:1998System design functional aspects list P11 and structure design location list L.2(E)Product specification PS(F)
Product installation details list PTH(G)
Operation specification (H)||t t||Installation()
Acceptance, special records 1[.1.
Operation M
Replacement of the motor N)
Replaceable motor type and supplier, PP) i. Technical modification (R)
Replacement ()
Suspension (U)
Except:
Explanation of the concept of "item" at the end of the life span
The meaning of "motor"
The definition of "day"
Explanation of the small lake that can be saved
Explanation of the concept of "surface"
Explanation of the full quota
G:B/T 5094.4-2005/IEC 61346-4:1998 About the reference code
11 Explanation of the reference code
11.1 Comparison of the names of the components
11.2 Comparison of the components
3 Examples
12 Explanation of the reference code
CB/I5094.4—2005/IEC61346-4.1998 GBT5031 Industrial systems, equipment and industrial products, principles and reference codes 3 are divided into two parts: -Part 1: Basic planning
Part 2: Typical H classification and sub-code, Part 3:
Part 4 is the 4th part of RT307, which is equivalent to IF61546-4, 991 industry system, equipment and efficiency of each industry production and reference standard (Part 1) 5 gas technology items in the same version 3
This part and other parts of GT509 replace GB50. This part is produced by the National Technical Committee for Standardization of Gas Structure, Document Preparation and Graphic Symbols and is under the jurisdiction of this part. The main drafting unit: Guodian Huabi Electric Power Design Institute! Engineering Co., Ltd., China Machinery Science Research Institute, China Machinery Productivity Promotion Center, and other participating units include: China Enterprise Joint Standardization Center, China Electric Power Research Institute, China Aviation University of Science and Technology Fourth Institute, China Aviation University of Science and Technology Second Cancer 23rd Institute, the spokespersons for this part are: Meijian Industry, Guo Ting, Shang Limin, Yu Ming, Ren Buzheng, Account Duan, Chen Huochao, Hand Product. Shan
1 Specification
: B/T5094.4—2005/正6T346-4.1998 Industrial systems, devices and equipment and industrial products—Structural principles Code
Part 4, Explanation of concepts
This part is based on the "item date" as the first paragraph: some basic concepts used in the program description of the life cycle of the program
2 Normative references
The following clauses are referenced by the Ministry of Industry and Information Technology of 35U9. The clauses of this part are the documents of the Ministry of Industry and Information Technology of 35U9. All subsequent amendments (not including the revisions) are not valid. However, it is encouraged that the new version of this document be used as soon as possible according to the agreement reached by the research and development personnel. The latest and most recent documents shall not be used. Applicable to this division
3/5321.12M21 industrial system, installation and modification, and factory production structure original account and code No. 1: Basic concept 1346: 1
B/T5094.2-2U031 industrial system, installation and equipment with &1 industrial product station structure principles and numerical sequence card No. 3: Item date classification code (lF13-:26c) 150/IE:J7C1/SC18/WG1N1632T Grass search: Multi-dye Yili super media bed technical report: Model writing grab 3 General rules
3.1 Method change History
[61412332 is equivalent to fire (5/2054,: -2002 has two predecessors, 09385 has been in use as B/T5J34 and its predecessor 1EC:60113-2197-. 1EC:6U7: 1983 letter code: the actual part is derived from 1F3113-?: 11. The application of these standards has been growing with the times, and the two E standards can be discussed, but their standards and specifications can still be distinguished by the way: Figure 1 replaces the application code of the cup road
GB/T 5094.4—7005/TRC: 51346-4:19983.2TEC.60113-2,1971
When the terminology used in the item code (110113-?) was first issued, it was just a classification of documents. The code was assigned a serial number to distinguish the same item. In order to deal with more complex designs, the code was used to add a hierarchical code before the item was added, and a simple structure was obtained: at that time, the information could be in the document. The purpose of the code was to match the documents within and between documents, especially to distinguish circuit diagrams from wiring diagrams and control line diagrams. The life cycle of the code was not yet common. At that time, the need was to reduce the production cost of equipment and make it a document that could be put into operation. At that time, the processing power of computers was limited, and it was necessary to use the storage space efficiently. At the same time, at least in the intelligent world, the processing power of computers was only limited to the "technique of punched cards", that is, the fixed data format was changed to a flexible "application-usable format. And the size of the storage space was very important. 3.31EC60750.1983
For 1075>, the hierarchical structure was not only used as a supplement to the component code, but also as a relatively limited tea car engineer for the design file. This was recognized by the world. People's concept changed. They realized that the code was more important than the component code. According to the circuit diagram, other files were widely used. These files usually contained a lot of information. The ability of computer processing had been accepted, and the "technique of punched cards" gave way to the "technique of the West and the Internet". 3.4IR: 61346-\:Before 1996, as far as the revision of E6070 is concerned, the application of the code name (such as the service code name) has been greatly improved. Each code name can be used as a "tool for information management" to make it a common file, so that the total number of files must not only contain the overall information, but can be stored in a "divided oblique" database, such as the Swiss, the meaning files (including graphics) can also be stored in the database. They can be used as a "learning tool" under the circumstances of the car test. It is also necessary to expand the scope of application to other equipment besides electrical equipment, postal equipment, software, etc. Computers can now be improved amazingly. We realize that the technology of inter-connectivity cannot solve all problems, but we believe that there are subtle ways to achieve it. Note: The essence of inter-connectivity design is to increase functionality, flexibility and adaptability in the context of the store, and to make the logical and concise description of the objects more important, rather than the flexibility to identify the objects in the environment.
A "special requirement has become necessary, that is, the reference code should be available for use throughout the life cycle of the "project". It can be said that they can be used throughout the life cycle of the product. Why not? Yes, What really matters is to refer to some properties and characteristics that must be possessed by modern animals. Therefore, the "demarcation" and life cycle layers have 4 life cycle requirements
In order to compile a specific life cycle history, you need to choose a specific application field. This is just to produce the life of the electrical agent in the production process:
This cannot be the case this time. The phenomenon described in this article is only applicable to this field. You can also select the life of the printed circuit board as a science, a phenomenon that should be treated by the user in this field, and the long-term use point is not written in the mouth. Therefore, if this type of life is not "your product", then your imagination may be far from the life cycle to a certain extent. 4 kinds of sound flow parts "Liu made, water! Changes such as this, the electric drive water music is based on the platform, for the sake of simplicity, I assumed that a "business had no plan, construction and commissioning, but some components were purchased from other places!" That hope is purchased. The leather case equipment was delivered to the final use of the exhibition, and the second company always provided all users with the information collected in the database, and the former purchasers would not have their own maintenance system. From the original email book, this layer of simplification, I don't have to worry about all kinds of documents: if the cost changes, there is no discussion on the subject received such as 2
5 "project" life cycle
CB/I 5094.4—2005/IFC: 61346-1:1995 The following notes specify the ten non-functional conditions that may occur during the life cycle of an item. The life cycle is divided into two parts (see Figure). 3.1 to 5.21 describe the different stages in the life cycle. Referring to Figure 2, the stages are identified by the letter -X 5.1 Functional and functional reference code (A) During the design work, the design of the engine must be carried out. The idea is that the engine should be of the same "engine level". There is no need to specify whether it is a core engine, a control engine or other type of engine. In order to distinguish it from other similar items, it is marked with a symbol: for this purpose, the European stable surface code will have a layer of x, and only this stage and functional surface will have an x.
When opening, the production flow design is often very different. For example, the pumping process may require different flow perturbations. This may also require the derivative of the function to be changed. 5.2 Functional requirements FR1 (B) wwW.bzxz.Net
The technical design determines the required values of the object from the process point of view. This determines the rated value of the engine. In general, it also determines the type of engine. This results in the following functional requirements: see the specification in this document. If you read it, I will judge it as FR1. Note that this specification and other types of specifications may consist of one document or another: or two documents. It is a combination of common symbols, but how the technology is completed in the form of a document. In addition to text, items can also be represented by one or more symbols, such as in the schematic diagram, which are called library codes. 5.3 Position and location reference code ()
The whole system is designed and configured, the process is analyzed and the requirements of the environmental conditions, size and other requirements of the civil engineering are analyzed, and the functional requirements are gradually completed. We can assume that we have reached the final state of this stage. The identification system of the environment has been determined: Since the identification system of the position has been determined, there are two ways to address the items according to the position code: 5.4 Component type specification F1
The main set of equipment has a large number of motors, and it is necessary to optimize the specifications of different motors to limit the number of parts. Method: The motor in the specification should comply with FR1, but you must select the "quantity" clock from the limited number of your standard specifications. The profit account can be found in the supply and purchase price specification: For the purpose of broad reference in this article, we call this specification (D). Specification (11 is generally not a part of the required month. It specifies the type of electric plan, and needs to be supplied to the network, because it is also suitable for the most direct design under the month,
Even if it is not necessary to use the type specification for various items, it is also necessary to make the functional requirements of the specification adapt to the existing standards. This means that there is only one type for each model, and in principle, CT1 is required. 5.5 The functional surface of the system design is detailed in the PL.1 and the location of the design surface is detailed in the PL2E) of the reverse process design of the electric agent will be shown in the circuit diagram, the relay table (that is, the equipment table, etc., which are called the existing types), the terminal table and the wiring table can be used in the control motor before the fire. Programming computer system (it provides some useful conclusions and identification issues, but we will also deal with this issue before we study it. The function surface position surface service code is used by all companies. The position code is used to select the CAI) system to produce small wiring tables and output tables. In order to meet the needs of cultural and educational information, we changed this list to PL1. In this list, the edge function surface code and are used to select items and classifications. The position reference code is used as an auxiliary signal. We call this column of the list P12. The child verification table is in the middle of the world and the reference code is used to select items and classifications (the function surface CB/T5094.4-2005/EC51346-4,1998 transfer code is used as an auxiliary signal! :
5.6 Product specification 1F
Definition When the motor is supplied, this means that the actual use of the parts may be different from the regulations. This is a requirement. We use the supplier's order to obtain the applicable electric product specification for actual use as the reference for this article. We call this specification "51". The key is that the specification must be based on the supplier's product name and product identification number (part number, product serial number, order number, etc.) in the project supplier's product list. That is, the unified identification product number used by the World Trade Organization is used again. In the past (for special motors), the motor must be specified, and the supplier promised to provide a complete set of documents (documents). In fact, the information contained in the document will be returned to the main document PT.1 and in the previous table, but this will cause information to be copied, which may lead to problems in the future.
Now the project is: "Product implementation. We are the first to contact the actual project leader. 5.7 Product Installation List PL3 (G)
Together with the motor, the mechanical parts specified in the site are used for the installation of the motor. For this purpose, the production process (installation process) is prepared for this assembly work: the motor is shown in the assembly drawing with a projection graphic, and the production safety invention table is listed as: the equipment listed in this article is the main reference, we call the list P.3, the sensor surface station is the PL2 model of the United States, which may be used to prepare the list, but in fact it is the same. Here, the item must be associated with the component % product surface installation: In this document, it is mainly used to refer to the product. Other reference codes can be added as auxiliary information but are not required. 5. E Transportation Specifications (H) || tt || Some components of the room are required to be transported on site and are effective: this does require appropriate inspection and packaging, on-site inspection and other coordinated markings. Although this topic is not open for research here. 5.9 Installation (J)
The motor shall be installed in accordance with the instructions and shall be provided with the equipment in the field. If necessary, the equipment nameplate shall be marked with the equipment nameplate and the equipment nameplate shall be placed near the actual motor. The equipment nameplate shall be a site document specifying the type of electric equipment at the location of the equipment. The actual type of the motor shall be presented in a size that is not necessary.
The motor shall be installed in accordance with the instructions and shall be provided with the information provided in step A. The equipment shall be delivered in time. The user file of the completed equipment service is transferred from the supplier to the purchaser at this time. The item must be carried out according to the purchaser's maintenance information system:
5.11 Acceptance. Special record IL! (L
Perform acceptance tests and conduct normal acceptance procedures. The acceptance has passed the inspection. At this time, it is necessary to use the record to prove the actual date of the machine's delivery. The actual item can be carried out using the supplier's serial number (if available) or your own registration number. This record must be clearly indicated by a label affixed to the machine or on the vehicle. In the maintenance system of the complete service, a set of documents is established for each actual machine or machine. In this sense, we call the special record T7. It can be marked with a registration number. Special records must be expressed according to the item date. 5.12 Operation M
Operation inspection, just as After the load test, large negative rotation test, and running time test are completed, they should be recorded in the operation record. Some of the information points may include new items, and the old data must be recorded in the relevant records. 5.13 Replaceable motor samples (N)
Photo! Establish a maintenance strategy, the original motor should be replaced with the same type of motor regularly, and the motor that is not replaced should be reported to GR/T5094.4-2005/IEC61346-4,1998. This means that the model must be replaced with the same type of motor as the actual motor. 5.14 Connectable motor type and supplier (1, PS2 (P) Although the motor enters the factory, it will eventually break down. The type of electric motor does not exist in the market. Suppliers Therefore, all the needs of the complete set of equipment are prepared. After studying the requirements of the initial specifications R1 and T: and obtaining the experience to be confirmed in the operation records, a new specification is formulated, and the new supply system is obtained. We call the new specification (T, and the actual supply of the motor product specification P) and give it to Beijing. The item will not be recorded with a new number, and the product identification number involved will be established. 5.:5 Process improvement R)
Further decision is made to make two processes. One kind of compilation is to add another case before the existing case, which is in line with the process requirements. This is a detailed description of the changes in the motor manufacturing industry. Due to the fact that the items that are still missing in time often do not use continuous numbers, this may lead to changes in the energy surface of the studied item. 5.16 Location expansion (S)
After expansion: The process of the combustion room operation must also be modified, and the code number of the operation may be changed. 5.17 Subsequent stages (T
The number of motors running, the state production operation is stopped. 5.18 U and other industries)
The equipment is responsible for the operation and finally stops the operation: the operation has been recorded.
5.19 Dismantling ()
The equipment is effective and the country has approved it to be disassembled to make the next material change. This is the end of the motor product. 5.20 Life cycle end (X
The interest of the equipment should be archived for many years: the information will be planned (or the market will promote more economical electric transformers).
After the whole life cycle of the project,
Figure 2 shows the diagram of the life cycle process.
Figure 2 Life cycle
GB/T5394.4—2005/I:61346-4:19986" Explanation of the concept of "project"
6.1 "Different meanings of "motor"
In the description of the life cycle, the term "electric" is usually used, while in the review text, it is replaced by technical terms, component types, product types, and actual motors. This should be emphasized. Technical terms "electric" have different meanings in actual use: a) Motor: The information has items such as FR1FR2, etc.; h) The motor has specifications 1, 3, etc.; h) Component types: The motor has specifications 1, 3, etc.; Motor: has a special record of the actual motor 111.2 etc. We would like to use the example of these may be mentioned in the code! ): We can record the actual motor or machine more and change the reference code 5, the same must be: change! c:? The product is very useful, and also use the motor to be paid to its buyer at this time back to the product:! ) If the type of battery is suitable for the necessary electric motor, the return must be: convex, such as suitable for an electric motor that the first kind of "day" product
According to the current situation of the dynamic station theory · painting, the oil is delivered to the item from the time of production until it is removed from the information of the moment of coffee. It is necessary to understand that other things are inferred.
It "packages" a person who relies on the same period as the process. Its complete set of information, including "temporary\ obtain coupon information, the most evaluated through the mark horse and the item hundred contact. Reading for these global changes in information now and in the future, the information he provides will be converted into a form of outdated information for the purpose of recording the fire. We are currently developing a drug project that only "shows the benefits of the dynamic domain" (a set of generalized descriptions of the supporting properties). A "real lock" is related to the starting point of the month, and this system of accounts is fixed and unchanging. With the daily receipt of the most needed information about the development of the demand for information about the scope of the process), the observation of what kind of scientific and technological type of these cases is being used to compare the benefits of a single product (such as the material of the service. Previously, for this country, what kind of product type and the historical record of a single actual product were also recorded in reverse with the process before and after. [If you need to play this month, you can be affected by: 6.2 "Project\'s definition || tt|| The speed of the project is lifeless at the same time, and the process may have a paired argument that it is not suitable for the people because it is too much about the changes in the market. The second state of change. The above is the state of change. This is absolutely correct, and the point emphasized during the life cycle is that the code system must be designed to handle the change ratio: the way to achieve this is to establish a reference code system based on concepts that are as close to the actual representation as possible. However, in our daily testimony, we often use the same meaning in the text, and we often mix the two realities together. In order to show them, we must study the interaction between the two. When we work, we cannot completely believe in the previous model: this is of course a product, and the concept wave used in the language is completely upgraded. This is one of the reasons why information modeling has become so important in modern computer system design. Changes are used to show the relationship between things such as reality. In the process of reviewing Zhou Si, it can be easily seen that [Figure 2]: We refer to the code-named items on the day of the month \ electric fold (reference to his model with the process) on my piece of daily life abandoned six (in a stable state) may be required to do "this also dynamic sinking" is different! Reference also point box)
In (BT50 time 1, 0 piece of water language definition long: in the design, a production, injection, legal responsibility, maintenance and demolition process of the non-real dependence, "
definition in other documents (/E1/, WGN1632): quality mouth: the inclusion of the interior and the station structure:
structure: how to organize the wind system,
GB7T 5C94.42005/De 613464:1998 Here the media participates in the judgment of the qualification and the qualification, because the "computing of the detailed list of the" "has been considered suitable for the reporting system. Before the creation of this word, it was said that the reference code of the item should be checked for a long time during the life cycle. (This situation does not happen often, but it does happen. In the computer system, it is best not to hang the reference code on the link word. In such a system, it is best not to use the symbol and fully protect the user of the system. The reference code only identifies the external. > If at least one reference code is used to identify the item and the code is continuously changing, it will change under this selected sliding condition. Before explaining the different life spans, we: have a deep understanding of the life cycle of the item, before We have come to the common life cycle, which can be regarded as the life cycle of an item. For electric motors, we have the following life cycles: The life cycle of an item: It has a relatively long range of use, and there is a demand for the item within this range. Its life cycle starts when the item is no longer in use and ends when it is no longer in use. The life cycle of a motor manufacturer is: the life cycle of a motor is calculated after the first generation of output is released, and ends with the life of a single motor. This life cycle is the point of use and use. It begins when the motor is manufactured and can be recycled.
Therefore, it is like a stage in the life cycle! Exploring this "not using" method can only involve practical companions|| tt||8 Explanation of the concept of "surface"
If we accept the request of a wide range of business information, then how do we understand the concept of "surface": we use the concept of "this one fills that kinetic energy or this one measures a product". The company's technology energy is often not defined as "1 item of the day's effect or what kind of thing or function it has, and the H book has this and that type of function". It is very strange, this classic definition of "item" refers to "a certain field of function", and what I mean by "function" is its function (a set of information that can flow in the month is a benefit, but the book is not the image of the text). The state of the state in the theory of the source and the state of the source are related to the function, product and benefit of these Ning Ning's misuse or secretion of the emperor must realize that the month cannot be just a kind of kinetic energy, a product, A position or please such an idea of inflammation - but the card: your project may "may advertise or it may have the real new use before and other effective real you day under the light of the nature of the space has this for the information,
a "real project day" may be necessary or only with its use of the country's conclusion, that is, with the nature of the country's design, so the project month contains necessary commercial flash information
a "practical project day" may need or it may have the nature of its new position case related to the internal door project day contains this aspect of the position information, etc. If the project day contains the above-mentioned various good information, then the color function aspect, product aspect and position aspect are all relevant, open it can be called the function mail, product aspect or position stomach aspect structure
there is one thing very important: it only has to do with the project and its thoughtful things how to refer to and the role of the type. They have nothing to do with the project itself. For example, this item is not related to the product for the actual point of production, but the instrument is because of the high-level reading of the product door it guards the method of keeping people,
try to compare the life of the product, "the engine" product structure in the country for its consumption of installed personnel (as a structural element), not because it is a product, the reverse is of course the same as the detailed use of the ground
position service code and other codes, called the same complete will have been accurately opened self-device book mark, some slightly installed limiter occupies the addressing position, this does not indicate "resistor is average", such as the optional installation of the section screw (artificial control installation in the H woman's self-unit only system and output, giving it power reference code GB/T 5094.4--2005/1EC 61346-4,199E loss. This does not mean that "spiral flow device is internal energy. Note: The project itself is defined in GB/T044.2, and the section is defined as the target category, not the average flow of the season station, see the reduction. The observation results of another infant in the same process (see, 1, 3, 5, 5 and 5.7) cannot be generally claimed as a reference code (such as functional surface life code) for the main identification of the point. The other is a box stock mark. The reference code is only an identification of the project in a specific aspect. If we look at the whole good life At present, we cannot give priority to any aspect in principle if we want to systematically apply it to all disciplines. For the general public in the department, the overall aspect is the most important, while for the manufacturing department, it is less concerned. The product aspect should be given priority. In the previous license code standards, the design and operation were given priority, and no explanation was given to this fact. If the standards are still valid, and people in other disciplines other than system design (electrical technology) are recognized, this is unacceptable. 9.1 Explanation of decomposition and structure Decomposition
The production process of the drug decomposition described in 5.1 is as accurate as possible. A diagram of the decomposition process is shown in Figure 3. Decomposition is generally a step-by-step process, starting with the "upper and lower" energy surfaces of the central decomposition, and the product synthesis "from bottom to top": the lipid separation is explained by the following five steps:
e) Delivering the required technical function, that is, the actual operation of it to its surrounding things: "connection". b) Deciding whether this functionality can be achieved by using existing products or plans. If it can not be achieved, it is divided into a group of new items. This is a creative process that is based on expertise and is dominated by the need for sound, so as to achieve the most frequent and cautious implementation. Use it to describe the functional relationship between the items. These should have exactly the same kinetic interface with the initial item as the sample in its surrounding matter. The project (item) is marked as belonging to the original project and the relationship between the projects. If necessary, the functionality of each sub-project is described and the sub-projects are further decomposed until it is found that these projects can be implemented with planned or existing products. Figure 3 Functional decompositionThe others are generic. Reference codes are merely an identification of an item in a particular area. If we look at the entire system and require that it be applicable to all disciplines, we cannot give any one area priority in principle. For the departmental designator, the overall aspect is the most important, while for the manufacturing department, there is less attention paid to the product aspect. In the previous license code standards, the designator gave priority to the designator, without any explanation of this fact. If the standard is still valid, it must be recognized by people in other disciplines besides system design (electrical technology). This is unacceptable. 9.1 Decomposition The production process of the cash dispenser described in 5.1 is as accurate as possible. Figure 3 shows a diagram of the decomposition process. Decomposition is generally a step-by-step process, starting with the "upper and lower" decomposition of the central energy surface, and then the "bottom-up" product synthesis: the following five aspects must be explained: a) Deliver the required technical function, that is, its actual function to the surrounding objects: b) Decide whether this function can be achieved by using existing products or plans. If it cannot be achieved, divide it into a group of items. This is a creative process, which is based on special skills and is governed by the need for sound, so as to achieve the most efficient and practical results. Use the following to describe the functional relationship between the items. These are the same as the initial project sample and have the same kinetic interface as the material in its surrounding. The item (item) is marked as belonging to the initial project and the relationship between the items. If necessary, the functional characteristics of each sub-item are further decomposed until it is found that these items can be implemented with planned or existing products. Figure 3 Functional decompositionThe others are generic. Reference codes are merely an identification of an item in a particular area. If we look at the entire system and require that it be applicable to all disciplines, we cannot give any one area priority in principle. For the departmental designator, the overall aspect is the most important, while for the manufacturing department, there is less attention paid to the product aspect. In the previous license code standards, the designator gave priority to the designator, without any explanation of this fact. If the standard is still valid, it must be recognized by people in other disciplines besides system design (electrical technology). This is unacceptable. 9.1 Decomposition The production process of the cash dispenser described in 5.1 is as accurate as possible. Figure 3 shows a diagram of the decomposition process. Decomposition is generally a step-by-step process, starting with the "upper and lower" decomposition of the central energy surface, and then the "bottom-up" product synthesis: the following five aspects must be explained: a) Deliver the required technical function, that is, its actual function to the surrounding objects: b) Decide whether this function can be achieved by using existing products or plans. If it cannot be achieved, divide it into a group of items. This is a creative process, which is based on special skills and is governed by the need for sound, so as to achieve the most efficient and practical results. Use the following to describe the functional relationship between the items. These are the same as the initial project sample and have the same kinetic interface as the material in its surrounding. The item (item) is marked as belonging to the initial project and the relationship between the items. If necessary, the functional characteristics of each sub-item are further decomposed until it is found that these items can be implemented with planned or existing products. Figure 3 Functional decomposition
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