JP7367256B1 - Information processing method - Google Patents

Abstract

[Problem] Appropriately evaluate the potential impact of a product on the environment. SOLUTION: An information processing method using an information processing device 1, wherein the information processing device 1 includes a control unit, a communication unit, and a storage unit, and is capable of communicating with one or more collection terminals 2 via the communication unit. , the control unit acquires manufacturing performance information for each lot of manufactured products from the collection terminal 2, information indicating a carbon dioxide emission coefficient, and from the manufacturing performance information and the carbon dioxide emission coefficient. An information processing method comprising: calculating carbon dioxide emissions for each lot; and storing manufacturing performance information and the calculated carbon dioxide emissions in a storage unit in association with a lot number. [Selection diagram] Figure 1

Description

The present disclosure relates to an information processing method.

Conventionally, a management system for managing renewable energy certification of products is known (for example, see Patent Document 1). The management system uses the input renewable energy supply rate and the input amount of raw materials and parts derived from renewable energy to calculate the number and rate at which renewable energy certification is granted to manufactured products. .

Japanese Patent Application Publication No. 2022-167067

Traditional management systems cannot calculate the carbon footprint of electrical energy. Carbon dioxide emissions from electrical energy vary depending on the power generation company due to differences in the power generation process, and also vary depending on the year of collection. Therefore, traditional management systems have room for improvement in assessing the potential environmental impact of products.

The purpose of this disclosure, made in view of such circumstances, is to appropriately evaluate the potential impact of products on the environment.

An information processing method according to an embodiment of the present disclosure includes:
An information processing method using an information processing device, the method comprising:
The information processing device includes a control unit, a communication unit, and a storage unit, and is capable of communicating with one or more collection terminals via the communication unit,
By the control section,
Obtaining manufacturing performance information for each lot of manufactured products from the collection terminal;
obtaining information indicating a carbon dioxide emission factor;
Calculating carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient;
storing the manufacturing performance information and the calculated carbon dioxide emissions in the storage unit in association with a lot number;
including.

According to an embodiment of the present disclosure, the potential impact of a product on the environment can be appropriately evaluated.

FIG. 1 is a schematic diagram of an information processing system according to the present embodiment. FIG. 1 is a block diagram showing the configuration of an information processing device. FIG. 2 is a block diagram showing the configuration of a collection terminal. FIG. 2 is a block diagram showing the configuration of a user terminal. It is a figure showing the data structure of lot information DB (database). It is a figure showing a display screen of lot information. 3 is a flowchart showing the operation of the information processing device.

FIG. 1 is a schematic diagram of an information processing system S of this embodiment. The information processing device 1 can communicate with one or more collection terminals 2 via the network NW. Although four collection terminals 2 are shown in FIG. 1, the number of collection terminals 2 may be arbitrary as an alternative example. The information processing device 1 can communicate with one or more user terminals 3 via the network NW. Although three user terminals 3 are shown in FIG. 1, the number of user terminals 3 is arbitrary. The network NW includes, for example, a mobile communication network, the Internet, or a fixed communication network.

In FIG. 1, only one information processing device 1 is shown for simplicity of explanation. However, the number of information processing devices 1 is not limited to this. For example, a process executed by the information processing device 1 may be executed by a plurality of distributed information processing devices 1. The plurality of information processing devices 1 may include a Web server, an AP (Application) server, a DB (Database) server, and the like.

The information processing device 1 is a computer such as a server belonging to a cloud computing system or other computing system. The information processing device 1 may be installed, for example, in a facility dedicated to a business operator or a shared facility including a data center.

In FIG. 2, the internal configuration of the information processing device 1 will be explained in detail. The information processing device 1 includes a control section 11, a communication section 12, and a storage section 13. Each component of the information processing device 1 is communicably connected to each other.

The control unit 11 includes, for example, one or more general-purpose processors including a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 11 may include one or more dedicated processors specialized for specific processing. The control unit 11 may include one or more dedicated circuits instead of including a processor. The dedicated circuit may be, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). The control section 11 may include an ECU (Electronic Control Unit). The control unit 11 controls the communication unit 12 to transmit and receive arbitrary information.

The communication unit 12 includes a communication module compatible with one or more wired or wireless LAN (Local Area Network) standards for connecting to the network NW. The communication unit 12 may include a module compatible with one or more mobile communication standards including LTE (Long Term Evolution), 4G (4th Generation), or 5G (5th Generation). The communication unit 12 communicates with one or more short-range communication standards or specifications including Bluetooth (registered trademark), AirDrop (registered trademark), IrDA, ZigBee (registered trademark), Felica (registered trademark), or RFID. It may include modules, etc. The communication unit 12 transmits and receives arbitrary information via the network NW.

The storage unit 13 includes, for example, a semiconductor memory, a magnetic memory, an optical memory, or a combination of at least two of these, but is not limited to these. The semiconductor memory is, for example, RAM or ROM. The RAM is, for example, SRAM or DRAM. The ROM is, for example, an EEPROM. The storage unit 13 may function as, for example, a main storage device, an auxiliary storage device, or a cache memory. The storage unit 13 may store information as a result of analysis or processing by the control unit 11. The storage unit 13 may store various information related to the operation or control of the information processing device 1 . The storage unit 13 may store system programs, application programs, embedded software, and the like. The storage unit 13 may be provided outside the information processing device 1 and may be accessed from the information processing device 1 . The storage unit 13 includes a lot information DB.

The collection terminal 2 shown in FIG. 1 is installed in a facility such as a factory and operated by a person in charge. The collection terminal 2 receives input operations from a person in charge and collects manufacturing performance information of products manufactured at the facility. The products here are parts for assembling automobiles, buildings, etc. Alternatively, the product may be a finished product. The collection terminal 2 may be a general-purpose device such as a PC, or a dedicated device. "PC" is an abbreviation for personal computer. As an alternative example, the collection terminal 2 may be a mobile device such as a smartphone, a mobile phone, a wearable device, or a tablet.

In FIG. 3, the internal configuration of the collection terminal 2 will be explained in detail.

The collection terminal 2 includes a control section 21 , a communication section 22 , a storage section 23 , an imaging section 24 , a display section 25 , an input section 26 , and an output section 27 . Each component of the collection terminal 2 is communicably connected to each other.

The description of the hardware configuration of the control unit 21, the communication unit 22, and the storage unit 23 may be the same as the description of the hardware configuration of the control unit 11, the communication unit 12, and the storage unit 13. Description here will be omitted.

The imaging unit 24 includes a camera and captures images. The image may be a still image or a moving image. The imaging unit 24 may generate an image and record the generated image in the storage unit 23. The imaging unit 24 is optional.

The display unit 25 is, for example, a display. The display is, for example, an LCD or an organic EL display. "LCD" is an abbreviation for liquid crystal display. "EL" is an abbreviation for electro luminescence. The display unit 25 may be connected to the collection terminal 2 as an external output device instead of being included in the collection terminal 2. As the connection method, for example, any method such as USB, HDMI (registered trademark), or Bluetooth (registered trademark) can be used. "USB" is an abbreviation for Universal Serial Bus. "HDMI (registered trademark)" is an abbreviation for High-Definition Multimedia Interface. The display section 25 may be a touch panel.

The input unit 26 is, for example, a microphone, a physical key, a capacitive key, a pointing device, or a touch screen provided integrally with a display. The input unit 26 accepts an operation to input information used for the operation of the collection terminal 2. The input unit 26 may be connected to the collection terminal 2 as an external input device instead of being included in the collection terminal 2. As the connection method, for example, any method such as USB, HDMI (registered trademark), or Bluetooth (registered trademark) can be used.

The output unit 27 includes one or more output interfaces that output information and notify the user. For example, the output interface included in the output unit 27 is a speaker or the like that outputs information in the form of audio, but is not limited thereto.

The user terminal 3 shown in FIG. 1 is operated by a user who has ordered a product. The user is, for example, a person in charge of a company that assembles cars, buildings, etc. based on products. The user terminal 3 receives a user's input operation and acquires product lot information from the information processing device 1 .

In FIG. 4, the internal configuration of the user terminal 3 will be explained.

The user terminal 3 includes a control section 31 , a communication section 32 , a storage section 33 , an imaging section 34 , a display section 35 , an input section 36 , and an output section 37 . The components of the user terminal 3 are communicably connected to each other.

The hardware configuration of the control section 31, communication section 32, storage section 33, imaging section 34, display section 35, input section 36, and output section 37 of the user terminal 3 will be explained below. The description of the hardware configuration of the section 22, the storage section 23, the imaging section 24, the display section 25, the input section 26, and the output section 27 may be the same. Description here will be omitted.

Hereinafter, the information processing method in this embodiment will be explained in detail with reference to FIG. 5 and subsequent figures. In this embodiment, any product is manufactured in a facility where the collection terminal 2 is installed. The product may be, for example, any of the following steel products:
・Deformed steel bars, wire rods, flat steel, shaped steel, H-shaped steel, square steel, round steel, thick plates, hot-rolled plates, thin plates

Steel products are manufactured in electric furnaces. An electric furnace generates an electric arc by applying high voltage to electrodes. An electric furnace melts, for example, iron scrap using arc heat. Molten steel produced by melting is processed into steel products after undergoing processes such as composition adjustment, casting, and rolling.

The control unit 21 of the collection terminal 2 receives input of manufacturing performance information for each lot number via the input unit 26. The manufacturing performance information includes mill sheet information and energy information. Energy information may be included in mill sheet information. The mill sheet information includes, for example, at least one of the following.
・Lot number, actual manufacturing time, manufacturing date and time, product specifications, product weight, product size, number of products, product chemical composition (e.g. C, Si, Mn, P, S, Cu, Sn, Cr, Mo, Ni, Al, B, Ti, Nb)
・Product strength

The energy information includes, for example, at least one of the following.
・Non-fossil energy usage in manufacturing ・Fossil energy usage in manufacturing

The control unit 21 transmits manufacturing performance information to the information processing device 1. As shown in FIG. 5, the control unit 11 of the information processing device 1 acquires manufacturing performance information for each lot of the product and stores it in the storage unit 13 in association with the lot number.

At least a portion of the electric power used in the electric furnace of this embodiment may be electric power that does not emit carbon dioxide and is generated from a non-fossil power source such as renewable energy. Renewable energy here refers to the following energy sources:
1. Solar power 2. Wind power 3. Hydropower 4. Geothermal energy 5. Biomass (organic substances derived from animals and plants that can be used as an energy source (excluding crude oil, petroleum gas, flammable natural gas, coal, and products manufactured from these). ).
(vi) In addition to energy sources 1 to 5 above, energy sources other than crude oil, petroleum gas, flammable natural gas, coal, and products manufactured from these that can be permanently used as an energy source for electricity. Items specified by Cabinet Order as permitted.

Non-fossil power sources include not only renewable energy but also, for example, nuclear power. Electricity generated from non-fossil sources includes the following two types:
1. Value of electricity itself (kWh value, etc.)
2. Non-fossil value In this embodiment, of the above two values, "2. Non-fossil value" is referred to as non-fossil value. Electric furnaces use electricity defined by non-fossil values. The non-fossil value here is the value recorded as a non-fossil power source when calculating the non-fossil power source ratio under Japan's ``Energy Supply Structure Advancement Act''. Non-fossil value is the value purchased by a new electricity retailer to achieve a defined target value.

Electricity defined by non-fossil value can be obtained and proven using at least one of the following three means, for example:
(1) Non-fossil certificate (2) Green electricity certificate (3) J credit

A non-fossil certificate is a certificate that represents the environmental value of electricity generated using renewable energy.

A green power certificate is a certificate of the environmental value of electricity generated using renewable energy. Green power certificates are unique as they have a serial number attached to them. The green power certificate includes information on the amount of generated electricity, the period of generation, the method of generation, and the date of issue of the certificate. The green power certificate further includes information on the name of the certification body and the name of the certificate issuing company.

J-Credit is a system in which the country certifies the amount of emission reduction and absorption of greenhouse gases such as carbon dioxide as "credits."

As an additional or alternative example, electricity defined in non-fossil value can also be obtained and verified by:
(4) Power generation using our own solar power generation equipment

As an alternative, the power used in the electric furnace may be power defined in zero-emission value rather than power defined in non-fossil value. The zero-emission value here refers to the value where the carbon dioxide emission coefficient under Japan's "Act on Promotion of Global Warming Countermeasures" (hereinafter referred to as the Global Warming Countermeasures Law) is zero. Specifically, the zero-emission value is calculated by multiplying the amount of electricity from non-fossil certificates procured by the "national average coefficient" when an electricity retailer calculates the adjusted emission coefficient, and calculates the actual carbon dioxide emissions. It is a value that can be subtracted from emissions. When power purchasers such as those in the manufacturing industry report their carbon dioxide emissions to the government based on the Global Warming Countermeasures Law, the carbon dioxide emission coefficient of electricity with zero emission value becomes zero. For example, electric power defined with zero emission value may be electric power generated by an existing electric power sales company using renewable energy such as hydropower or nuclear power. Electricity defined at zero emission value can be obtained and verified by:
(5) Contracts with electricity retailers (e.g. "Aqua Premium" (registered trademark) and "Aqua Energy 100" provided by TEPCO Energy Partner (registered trademark))

For each of the means (1) to (5) exemplified above, information such as a certificate proving that the electricity used in the electric furnace is defined as non-fossil value or zero emission value is unique. The second certification information is obtained from the certificate issuing business or certification body. The above means (1) to (5) are just examples, and can be replaced by any other means that proves that the electricity used in the electric furnace is electricity defined by non-fossil value or zero emission value. .

In this embodiment, the method for proving that the electricity used in the electric furnace is electricity defined by non-fossil value or zero emission value is to obtain certification information using any of (1) to (5) above. There is a way to prove it. Credentials may be purchased at auction or from an intermediary. The certification information is stored in the storage unit 13 of the information processing device 1.

As an additional example, certification information may include non-fossil residue information certified by any manufacturer.

As shown in FIG. 5, the control unit 11 of the information processing device 1 stores manufacturing performance information and certification information in the storage unit 13 in association with the lot number for each lot.

The control unit 11 acquires information indicating the carbon dioxide emission coefficient from an arbitrary terminal such as the collection terminal 2. Carbon dioxide emission factors are set for each energy used in manufacturing. For example, the current year's carbon dioxide emission factor may be released after the current year ends. In this case, the control unit 11 may determine that the carbon dioxide emission coefficient for this year is undetermined, and may provisionally acquire the target value published by the electric power company as the carbon dioxide emission coefficient for this year. The control unit 11 can obtain the current year's carbon dioxide emission coefficient by the following procedure.
Step 1. From the previous year's carbon dioxide emission coefficient and non-fossil power ratio, estimate the usable amount of non-fossil power on a previous year basis, and reflect the estimation results in the planned power plan for manufacturing this year. As an alternative example, the target value for the current year described in the energy and environment plan published by any local government or electric power company may be adopted as the carbon dioxide emission coefficient or the non-fossil power ratio.
Step 2. This fiscal year's non-fossil electricity will be allocated according to customer requests.
Step 3. When the final value of the carbon dioxide emission coefficient for this year is released, the final value will be reflected in the performance of the allocated portion of non-fossil electricity and the remaining amount of electricity other than non-fossil electricity.

As shown in FIG. 5, the control unit 11 stores the carbon dioxide emission coefficient for each lot.

The control unit 11 of the information processing device 1 calculates the amount of carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient. The manufacturing performance information here includes information indicating actual manufacturing time and energy information indicating energy used for manufacturing. The respective units of actual manufacturing time, energy information, carbon dioxide emission coefficient, and carbon dioxide emission amount are as follows.
・Actual manufacturing time: h
・Energy information: kW
・Carbon dioxide emission factor: kg/kWh
・Carbon dioxide emissions: kg
As shown in FIG. 5, the control unit 11 stores the calculated carbon dioxide emissions in association with the lot number.

As an additional or alternative example, if the entire amount of electricity used in manufacturing the lot is derived from non-fossil electricity, the control unit 11 calculates the carbon dioxide emission coefficient as zero. If the control unit 11 determines that the electricity used is a mixture of fossil electricity-derived electricity and non-fossil electricity-derived electricity, it uses the final value of the carbon dioxide emission coefficient for the current year announced by each electric power company. do. If the final value has not yet been announced, the control unit 11 uses the planned value of the carbon dioxide emission coefficient, and after determining the carbon dioxide emission coefficient, replaces the planned value with the final value in the storage unit 13.

As an additional example, the control unit 11 can offset or reduce the carbon dioxide emissions [kg] calculated for each lot. Specifically, the control unit 11 compares the calculated amount of carbon dioxide emissions with the desired amount of carbon dioxide emissions specified in the product order. When the control unit 11 determines that the amount of carbon dioxide emissions is larger than the desired amount of carbon dioxide emissions, it reads out carbon dioxide credits corresponding to the difference between the amount of carbon dioxide emissions and the desired amount of carbon dioxide emissions from the storage unit 13 . The control unit 11 can store the read carbon dioxide credit in the storage unit 13 in association with the lot number.

Information stored in association with a lot number in the lot information DB of the storage unit 13 (for example, manufacturing performance information, certification information, information indicating a carbon dioxide emission coefficient, and information indicating a carbon dioxide emission amount) is referred to as lot information. . Lot information may be referred to as DPP (Digital Product Passport) information. A two-dimensional code containing a hyperlink to lot information may be printed with paint on the product, or a two-dimensional code sticker may be attached to the product. Alternatively, the two-dimensional code may be marked on the product using mechanical marking, laser marking, or other techniques. The two-dimensional code may be written on a paper or electronic lot certificate.

The user of the user terminal 3 is a person in charge of an assembly factory that assembles finished products such as automobiles from products (here, one or more parts). A user of the user terminal 3 uses the user terminal 3 to read a two-dimensional code for each part in order to view lot information for each part. The user terminal 3 accesses the hyperlink included in the two-dimensional code and acquires lot information from the information processing device 1. As shown in FIG. 6, the control unit 31 of the user terminal 3 displays the acquired lot information on the display unit 35. In FIG. 6, a lot number and a carbon dioxide emission coefficient are shown as lot information. As an additional or alternative example, at least one of the following information may be displayed on the display unit 35 as lot information.
・Lot number, actual manufacturing time, manufacturing date and time, product specifications, product weight, product size, number of products, product chemical composition (e.g. C, Si, Mn, P, S, Cu, Sn, Cr, Mo, Ni, Al, B, Ti, Nb)
・Product strength ・Non-fossil energy consumption ・Fossil energy consumption ・Carbon dioxide emissions (before J credit offset)
・J Credit number ・Carbon dioxide emissions (after J Credit offset)
The user of the user terminal 3 can grasp the determined carbon dioxide emissions for each finished product by calculating (for example, summing) the carbon dioxide emissions for each part. The calculation process may be executed by the control unit 11. In this case, the control unit 11 transmits information indicating the calculated carbon dioxide emissions to the user terminal 3 of the user who ordered the finished product as product certification information.

As an additional or alternative example, the information processing device 1 may be a node of a distributed ledger (Hyperledger) type blockchain network. A blockchain network may be a public network connected to the Internet or a private network. The control unit 11 registers lot information in the blockchain. Lot information may be stored in one block of the blockchain for each record.

With reference to FIG. 7, an information processing method by the control unit 11 of the information processing device 1 will be explained.

In step S1, the control unit 11 acquires manufacturing performance information for each lot of manufactured products from the collection terminal 2 at an arbitrary timing. The control unit 11 acquires information indicating the carbon dioxide emission coefficient. In step S2, the control unit 11 calculates the carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient. In step S3, the control unit 11 stores the manufacturing performance information and the calculated carbon dioxide emissions in the storage unit 13 in association with the lot number. In step S4, the control unit 11 creates lot information including manufacturing performance information and carbon dioxide emissions, and transmits it to the user terminal 3.

As described above, according to the present embodiment, the control unit 11 of the information processing device 1 acquires manufacturing performance information for each lot of manufactured products from the collection terminal 2, and indicates the carbon dioxide emission coefficient. obtaining information, calculating the carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient, and associating the manufacturing performance information and the calculated carbon dioxide emissions with the lot number. An operation including storing the information in the storage unit 13 is executed. With this configuration, the information processing device 1 can grasp the amount of carbon dioxide emissions for each lot, and therefore can appropriately evaluate the potential impact of the product on the environment. Further, the information processing device 1 can deal with a carbon dioxide emission coefficient that changes over time without setting the carbon dioxide emission coefficient to a constant fixed value.

Further, according to this embodiment, the product is a finished product that includes one or more parts. The operation of the control unit 11 is to calculate the carbon dioxide emissions of the finished product from the carbon dioxide emissions of each part, and send information indicating the calculated carbon dioxide emissions to the user terminal 3 of the user who ordered the finished product. , including sending it as product certification information. With this configuration, the information processing device 1 can support the ordering user in appropriately evaluating the potential impact of the product on the environment.

Further, according to the present embodiment, the operation of the control unit 11 includes comparing the desired amount of carbon dioxide emissions specified in ordering the product with the amount of carbon dioxide emitted during the manufacturing of the product, and determining whether the amount of carbon dioxide emissions is If it is determined that the amount of carbon dioxide emissions is greater than the desired amount of carbon dioxide emissions, a carbon dioxide credit corresponding to the difference between the amount of carbon dioxide emissions and the desired amount of carbon dioxide emissions is read out from the storage section 13 and stored in the storage section 13 in association with the lot number. ,including. With this configuration, the information processing device 1 can support carbon dioxide reduction or offset actions for each lot by companies and the like in the circular economy.

Further, according to the present embodiment, the information processing device 1 is a node of a blockchain network, and the operation of the control unit 11 includes registering manufacturing performance information and carbon dioxide emissions in the blockchain. With this configuration, registration information is distributed and shared by all nodes. In other words, there is no need for a central administrator. Therefore, the information processing device 1 provides the following effects.
- Difficult to tamper - There is no single point of failure, so there is no system downtime - Easy to share data with other systems Therefore, the information processing device 1 can realize a highly secure and low-cost system. . Additionally, all data is recorded on the blockchain, ensuring traceability.

Further, according to the present embodiment, the manufacturing performance information includes information indicating actual manufacturing time. With this configuration, the information processing device 1 can improve the calculation accuracy of carbon dioxide emissions.

According to the present embodiment, the operation of the control unit 11 is such that when it is determined that the carbon dioxide emission coefficient for this year is undetermined, the operation of the control unit 11 is to obtain the target value published by the electric power company as the carbon dioxide emission coefficient for this year. include. With this configuration, the information processing device 1 can calculate the amount of carbon dioxide emissions even if the current year's carbon dioxide emission coefficient has not been determined.

Although the present disclosure will be described based on the drawings and examples, it should be noted that those skilled in the art may make various changes and modifications based on the present disclosure. Other changes are possible without departing from the spirit of the present disclosure. For example, the functions included in each means or each step can be rearranged so as not to be logically contradictory, and it is possible to combine or divide a plurality of means or steps into one.

For example, in the embodiments described above, a program that executes all or part of the functions or processes of the information processing device 1, collection terminal 2, and user terminal 3 can be recorded on a computer-readable recording medium. . A computer readable recording medium includes a non-transitory computer readable medium, such as a magnetic recording device, an optical disk, a magneto-optical recording medium, or a semiconductor memory. Distribution of the program is performed, for example, by selling, transferring, or lending a portable recording medium such as a DVD (Digital Versatile Disc) or a CD-ROM (Compact Disc Read Only Memory) on which the program is recorded. Furthermore, the program may be distributed by storing the program in the storage of an arbitrary server and transmitting the program from the arbitrary server to another computer. The program may also be provided as a program product. The present disclosure can also be implemented as a program executable by a processor.

1 Information processing device

Claims (5)

An information processing method using an information processing device, the method comprising:
The information processing device includes a control unit, a communication unit, and a storage unit, and is capable of communicating with one or more collection terminals via the communication unit,
By the control section,
Obtaining manufacturing performance information for each lot of manufactured products from the collection terminal;
obtaining information indicating a carbon dioxide emission factor;
Calculating carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient;
storing the manufacturing performance information and the calculated carbon dioxide emissions in the storage unit in association with a lot number;
including;
If it is determined that the entire amount of electricity used in manufacturing the lot is derived from non-fossil electricity, calculating the carbon dioxide emission coefficient as zero ;
The product is a finished product containing one or more parts,
Calculating the carbon dioxide emissions of the finished product from the carbon dioxide emissions of each part,
An information processing method comprising transmitting information indicating the calculated carbon dioxide emissions to a user terminal of a user who ordered the finished product as product certification information. An information processing method using an information processing device, the method comprising:
The information processing device includes a control unit, a communication unit, and a storage unit, and is capable of communicating with one or more collection terminals via the communication unit,
By the control section,
Obtaining manufacturing performance information for each lot of manufactured products from the collection terminal;
obtaining information indicating a carbon dioxide emission factor;
Calculating carbon dioxide emissions for each lot from the manufacturing performance information and the carbon dioxide emission coefficient;
storing the manufacturing performance information and the calculated carbon dioxide emissions in the storage unit in association with a lot number;
including;
If it is determined that the entire amount of electricity used in manufacturing the lot is derived from non-fossil electricity, calculating the carbon dioxide emission coefficient as zero;
Comparing the desired amount of carbon dioxide emissions specified in the order for the product with the amount of carbon dioxide emissions during the manufacturing of the product;
If it is determined that the amount of carbon dioxide emissions is greater than the desired amount of carbon dioxide emissions, a carbon dioxide credit corresponding to the difference between the amount of carbon dioxide emissions and the desired amount of carbon dioxide emissions is read out from the storage section and is assigned to the lot number. storing it in the storage unit in association with the
Information processing methods including. The information processing method according to claim 1 or 2 ,
The information processing device is a node of a blockchain network,
An information processing method including registering the manufacturing performance information and the carbon dioxide emissions in a blockchain. The information processing method according to claim 1 or 2 ,
The information processing method, wherein the manufacturing performance information includes information indicating actual manufacturing time. The information processing method according to claim 1 or 2 ,
An information processing method comprising, when determining that the carbon dioxide emission coefficient for this year is undetermined, acquiring a target value published by an electric power company as the carbon dioxide emission coefficient for the current year.

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