JP2002230087A - Recyclability evaluation method, product design method using the same, and recyclability evaluation device - Google Patents

Abstract

(57) [Summary] [Problem] To easily evaluate the economics of recycling. A product design information list is created in step ST1, and workability for each assembly unit operation is evaluated in step ST2. In step ST3, a disassembly unit operation based on the assembly unit operation is set, and in steps ST4 to ST6, a disassembly cost for each disassembly unit operation is calculated.
From this disassembly cost, the total disassembly cost required for disassembly of the product is calculated. In step ST7, for each material obtained by disassembling the product, the material price is calculated from the transaction price of the material, and the total material price is calculated from the material price for each material. Step S
At T8, the calculated total disassembly cost is compared with the total material price to evaluate the occurrence of profit or loss.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recyclability evaluation method, a product design method using the same, and a recyclability evaluation device. For details, calculate the disassembly cost required for disassembly of the product, calculate the material price from the transaction price of the material obtained by disassembling the product, compare the calculated disassembly cost with the material price, and calculate the profit or loss In addition to the evaluation of the occurrence, the product is designed based on the evaluation result so that the loss can be reduced and the profit can be obtained.

[0002]

2. Description of the Related Art At present, attention has been paid to environmental problems and waste disposal problems on a global scale. In addition, the shift to a recycling-oriented economic system for recycling has become an important social issue.

[0003] Here, large television sets, refrigerators, washing machines, and air conditioners (air conditioners) are required to recycle in accordance with the enforcement of the Home Appliance Recycling Law. Developing and preparing.

[0004] On the other hand, small electronic devices such as video cameras and mobile phones have no legal obligation to recycle, and discarded electronic devices are collectively pulverized and landfilled. In addition, small electronic devices are not only spreading rapidly, but also undergoing rapid technological progress, so products become obsolete faster than product life, and products are more likely to be discarded before failure. Therefore, it is also important to use resources efficiently by recycling them without being crushed and landfilled. It is highly likely that the duty to recycle these electronic devices will be legislated.

[0005]

By the way, various inventions have been made regarding the recycling of products from the viewpoint of the recycling rate, the magnitude of the influence on the global environment, or the difficulty of recycling (for example, Japanese Patent Application Laid-Open No. 7-24831). JP-A-11-25064, JP-A-2000-2000
37684, etc.). However, in order to make product recycling a viable business, it is necessary to evaluate the economics of recycling, determine whether it is possible to secure profits from recycling, and take measures to prevent losses from recycling. No.

[0006] Here, when evaluating the economics of recycling, a method that uses an automated line to crush all materials and separate them for each material can easily reduce the disassembly cost and the material price of the material obtained by recycling. Can be calculated. However, if the product being recycled is a small electronic device,
In the method of performing the batch crushing on the automated line and separating the raw materials, the purity of the reusable raw materials cannot be secured. For this reason, a method of separating a reusable material while disassembling a product is used. When recycling using this method, the efficiency of disassembly work varies greatly depending on the assembly state of the product and the mounting state of the parts, so the economics of recycling are similar to the method of crushing the product at once and separating it into individual materials. Cannot be easily evaluated.

Therefore, the present invention provides a recyclability evaluation method and a recyclability evaluation method that can easily evaluate the economics of recycling even when recycling is performed using a method of separating reusable materials while decomposing products. The present invention provides a product design method and a recyclability evaluation device using the same.

[0008]

A recyclability evaluation method according to the present invention sets a disassembly unit operation based on a work unit of a product assembling operation, calculates a disassembly cost for each disassembly unit operation, and calculates a product from the disassembly cost. A first calculation process for calculating a total disassembly cost required for disassembly of the material, and for each material obtained by disassembling the product, a material price is calculated from a material transaction price, and a total material price is calculated from the material price for each material. Economic evaluation for evaluating the occurrence of a profit or loss by comparing the total calculation cost calculated in the second calculation processing with the total disassembly cost calculated in the first calculation processing with the total material price calculated in the second calculation processing. And processing.

In the product design method, a disassembly unit operation is set based on a work unit of an assembly operation of a product, a disassembly cost for each disassembly unit operation is calculated, and a total disassembly cost required for disassembly of the product is calculated from the disassembly cost. A first calculation process of calculating a material price from a material transaction price for each material obtained by disassembling a product, and calculating a total material price from a material price of each material; An economic evaluation process for comparing the total disassembly cost calculated in the first calculation process with the total material price calculated in the second calculation process to evaluate the occurrence of a profit or a loss, and an economic evaluation process. Using the evaluation results,
A change process for changing the material used for the product and changing the workability of the disassembly work so that the total disassembly cost is lower than the total material price.

[0010] Further, the recyclability evaluation device includes disassembly work evaluation information for evaluating the workability of the disassembly work of the product;
Storage means for storing at least transaction price information for each material obtained by disassembling the product, and disassembly unit work based on the work unit of the product assembling work, and disassembly work evaluation information stored in the storage means. Calculate the disassembly cost for each disassembly unit operation by using it, calculate the total disassembly cost required for disassembly of the product from the disassembly cost, and disassemble the product using the transaction price information stored in the storage means. Calculate the obtained material price for each material, calculate the total material price from the material price for each material, compare the total disassembly cost with the total material price, and calculate the profit or loss by calculating means And output means for outputting the evaluation result of the calculation means.

In the present invention, the disassembly unit work is set based on the work unit of the product assembling work. For example, the disassembly time is calculated from the disassembly workability and the number of parts for each disassembly unit work, and the work unit price is included in the disassembly time. The decomposition cost is calculated by multiplication. Further, the total disassembly costs required for disassembly of the product are calculated by summing up the disassembly costs for each disassembly unit operation. Further, for each material obtained by disassembling the product, the material price is calculated from the transaction price of the material, and the material prices for each material are summed to calculate the total material price. The calculated total disassembly cost and the total material price are compared to evaluate the occurrence of a profit or loss. Furthermore, the material used for the product and the disassembly operation are changed so that the total disassembly cost is lower than the total material price by using the economic evaluation result.

[0012] Further, in a storage device such as a hard disk, disassembly work evaluation information for evaluating the workability of disassembly work of the product, transaction price information for each material obtained by disassembling the product, and information on parts used in the product. And information on assembly and the like are stored, and the total disassembly cost and the total material price are calculated using the stored information, and the total disassembly cost and the total material price are compared to determine whether a profit or loss occurs. The evaluation result is output.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a flowchart showing the procedure of recyclability evaluation. First, in step ST1, a list of parts constituting a product, a parts specification, and a procedure manual showing work procedures for assembling the product in which process and how to use the parts are prepared for each assembly unit work. Create a product design information list.

FIG. 2 shows an example of the product design information list. For example, the third assembling unit operation in the operation procedure is a screw tightening operation, and B3 screws which are part A3 are used, and according to the specification of this part "A3", the material of the screw is "Z3" and the weight is "w3". , The product design information as shown in the third row of FIG. 2 is created from these pieces of information. In the product design information list shown in the third row, in the screw tightening operation, B3 parts having a weight of w3 are used, so that the weight W3 is "w3 * B3".

Next, in step ST2, the workability of each assembly unit work in the product design information list created in step ST1 is evaluated using a scoring table for each assembly unit work. FIG. 3 shows an example of an assembling work evaluation score table, which is assembly work evaluation information.

In the scoring table for each assembly unit operation, a scoring item is set for the assembly unit operation from a plurality of viewpoints. For example, FIG. 3 shows a case in which evaluation is performed from the viewpoints of parts, work, and additional conditions, and for the parts, the alignment and supply of the parts are scored as part characteristics. As for the work, the assembling characteristics include the assembling direction, holding, insertion and the like as scoring items. Regarding the additional condition, holding and reversal are graded as posture characteristics.

In the scoring table for each assembly unit operation, scoring according to the difficulty of the operation is performed for the set scoring items. Here, in the case shown in FIG.
It is assumed that a scoring range is set in advance, and scoring according to the difficulty is performed within this scoring range. For example, in the item of the component characteristic alignment, the allocation range is set to “10 to 20”, and within this allocation range, the allocation points are increased with increasing difficulty. Further, in the item of supply, the allocation range is set to “0 to 10”, and the allocation point is increased within this allocation range with increasing difficulty.

Using the scoring table for each assembly unit work created in this way, the work content of each assembly unit work indicated in the product design information list is analyzed, and the score of each scoring item is determined for each assembly unit work. The points are added, and the added points are subtracted from the preset reference points to obtain work points.

The work points "C1 to C10" indicate the workability in each assembly unit work, and indicate that the higher the work points, the easier the assembly. For this reason,
In designing a product, a product can be manufactured efficiently by designing so that the number of work points is increased.

Next, in step ST3, the unit work of the disassembly information list shown in FIG. 4 is set with reference to the assembly unit work of the product design information list shown in FIG. For example, when the supply of the component A1 and the removal of the component A10 are sequentially performed according to the product design information list shown in FIG. 2, the reverse process of this procedure, that is, the process from the supply of the component A10 to the discharge of the component A1 is performed in a disassembly unit operation. And The disassembly unit work of the disassembly information is not limited to the assembly unit work of the product design information list in the reverse order, but the disassembly unit work is set in an order in which the product can be disassembled. That is, the component K
When the assembly is performed after attaching the component K2 after attaching the component 1, if the component K2 cannot be removed without removing the component K1, the disassembly unit operation may not be in the reverse order of the assembly unit operation. In step ST4, the disassembly workability for each disassembly unit operation in the disassembly information list created in step ST3 is evaluated using the disassembly unit operation conversion table.

FIG. 5 shows a conversion table for each disassembly unit operation, which is disassembly work evaluation information. The scoring items in the conversion table for each disassembly unit operation are the scoring items of the scoring table for each assembly unit operation shown in FIG. By setting in accordance with, it is possible to easily set the scoring items. For example, with respect to components, discharging and sorting of components are set as the graded items as component characteristics. As for the work, the separation items, the holding direction, the take-out operation, and the like are set as the marking characteristics as the separation characteristics. Regarding the additional condition, holding and reversal are graded as posture characteristics.

In the scoring table for the disassembly unit work, the set scoring items are assigned in accordance with the difficulty of the work, similarly to the scoring table for the assembly unit work. For example, in the item of discharge of component characteristics, the allocation range is set to “0 to 10”, and within this allocation range, the allocation point is increased with increasing difficulty. Also, in the selection item, set the scoring range to "0-20",
Within this scoring range, the scoring point is increased with increasing difficulty.

Using the scoring table for each disassembly unit created in this way, the number of work points shown in the product design information list of FIG. 2 is converted into the number of disassembly work points, and the number of disassembly work points representing this disassembly workability is calculated. Add to decomposition information list. That is,
Since the scoring items of the conversion table for each disassembly unit operation are set in correspondence with the scoring items of the scoring table for each assembly unit operation, the scoring results of each scoring item in the assembly unit operation are based on the scoring of the disassembly unit operation scoring table. Then, the score is converted into a scoring result in the disassembly unit work, and the score of each scoring item after the conversion is added for each disassembly unit work. Further, the disassembly work points “D10 to D1” are calculated by subtracting the added points from the preset reference points, and are added to the disassembly information list.

In the scoring items, there may be cases where the difficulty of the work at the time of assembly and the difficulty of the work at the time of disassembly do not match. For example, if there is a scoring item that is easily determined in assembly but difficult in disassembly and difficult in assembly but easy in disassembly, adjust the points in the conversion table for each disassembly unit operation. For a scoring item that has been determined to be easy to assemble and has a small number of points, conversion corresponding to actual work can be performed by increasing the points in the disassembly.

In step ST5, a disassembly time is calculated for each disassembly unit operation and added to the disassembly information list. Here, since the disassembly work points representing the disassembly workability for each disassembly unit operation have been calculated in step ST4, the disassembly work points are multiplied by a time coefficient to determine the disassembly time per part, and further, The time obtained by multiplying the numbers is set as the decomposition time. As described above, since the disassembly time is set based on the workability and the number of parts of each disassembly unit operation, the disassembly time can be set accurately without actually measuring the disassembly time for each disassembly unit operation.

In step ST6, the disassembly time calculated in step ST5 is multiplied by the unit cost of work (cost per unit time) to calculate a disassembly cost for each disassembly unit work, and this disassembly cost is added to the disassembly information list. I do. Further, a total disassembly cost ET which is a total value of the disassembly costs is calculated by adding the disassembly costs “E10 to E1” for each disassembly unit operation. In addition, by adding the cost of materials and the like required for each disassembly unit operation to the disassembly cost, it is possible to improve the evaluation accuracy of the recycling economy.

In step ST7, based on the product design information list created in step ST1, the amount of recycled material obtained for each disassembly unit operation and the material price obtained for each disassembly unit operation are obtained from the transaction price of this material. Is calculated and added to the degradability evaluation list. Further, the total material price PT which is the total value of the raw material prices is calculated by adding the raw material prices "P10 to P1" for each disassembly unit operation.

For example, the disassembly unit work on the eighth line of the disassembly evaluation list is a case where the screw attached in the assembly unit work on the third line of the product design information list shown in FIG. When a screw is handed over to a recycler, the three screws obtained by this disassembly unit work become materials to be traded with the recycler. This screw is
Since the material “Z3” and the weight are “W3 (weight of three screws)”, when the transaction price of the material “Z3” is “VA3” per unit weight, the material price “P3” is “P3”.
3 = W3 × VA3 ”.

In the case where a fee is paid when dealing with the material obtained by disassembling the material with a recycler, and when the payment of “VB3” per unit weight is caused in dealing with the material of the material “Z3”, the material price “ "P3" becomes "P3 =-(W3
× VB3) ”. In step ST8, step S
The economical efficiency of recycling is evaluated using the total disassembly cost ET calculated in T6 and the total material price PT calculated in step ST7.

FIG. 6 shows the total disassembly cost ET and the total material price P
It is a figure for evaluating the economical efficiency of recycling from T.
Here, the straight line LS is a so-called break-even line in which the cost required for disassembly and the material price obtained by trading the material to be recycled are equal. In order to prevent the occurrence of loss due to recycling, the total disassembly is performed. The relationship between the cost ET and the total material price PT may be set so that the region above the breakeven line, that is, the total disassembly cost ET is equal to or less than the total material price PT. Therefore, the economy of recycling can be evaluated in advance at the product design stage from the total disassembly cost ET and the total material price PT. Further, it is also possible to predict how much profit and loss will occur each time recycling is performed.

Further, since the disassembly cost is calculated for each disassembly unit operation, it is easy to determine which disassembly unit operation should be improved in order to reduce the disassembly cost, and the disassembly unit operation can be determined by the product design information. Because it is related to the list, it is designed to reduce the disassembly cost for the assembly unit work corresponding to the disassembly unit work with high disassembly cost, so that it is environmentally friendly with excellent recyclability We can design mold products. Furthermore, it is possible to construct a recycling system that assumes that the product will be used and recycled in the future.

By the way, in the assembly unit work, the reference value RA with respect to the average value X of the number of work points in all the assembly unit works
And the reference value RC for the percentage Y of the assembly unit work that is higher than the reference value RB and the reference value RB of the number of work points in the assembly unit work, for example, the average value X
Is greater than or equal to the reference value RA and the ratio Y is greater than or equal to the reference value RC,
The relationship between the total disassembly cost ET and the total material price PT becomes a curve La shown in FIG. 6, and if either the average value X or the ratio Y is equal to or more than the reference value, it becomes a curve Lb. If the curve Lc is obtained when any of them is less than the reference value, the assembly unit work may be designed so that the relationship between the total disassembly cost ET and the total material price PT becomes the curve La. Products can be designed.

Next, FIG. 7 shows the configuration of a recyclability evaluation apparatus for performing the above-described recyclability evaluation method. The recyclability evaluation device 10 includes a CPU (Central Processing Unit)
The CPU 101 has a built-in bus 12.
0, a large-capacity storage device 104 such as a ROM 102, a RAM 103, a hard disk drive, etc., and an input / output interface 105 are connected. Further, an input unit 111, a recording medium drive 112, and an image output unit 113 are connected to the input / output interface 105.

When a command is input from an input unit 111 configured using operation input means such as a keyboard or a mouse or voice input means such as a microphone, the command is supplied to the CPU 101 via the input / output interface 105. You.

In the CPU 101, a ROM 102 and a RAM
A program stored in the storage device 103 or the large-capacity storage device 104 is executed to perform a process according to the supplied instruction. Further, the ROM 102, the RAM 103, or the mass storage device 104 also stores a program for executing the above-described recyclability evaluation shown in FIG. Further, a scoring table for each assembly unit operation, a conversion table for each disassembly unit operation, and transaction price information per unit amount when trading materials are stored in the large-capacity storage device 104 and made into a database.

A program for executing the above-described recyclability evaluation is stored in the ROM 102 or the mass storage device 1.
04, as well as a recording medium utilizing magnetism or light, or a removable information recording / transmission medium, such as a floppy (registered trademark) disk or CD- As an optical disk such as a ROM, a magneto-optical disk such as an MO disk, a tape cartridge, or a semiconductor memory,
The removable information recording transmission medium is mounted on the recording medium drive 112 to read a recorded program, and the read program is read by the input / output interface 1.
05 or the bus 120 may be installed by storing it in the ROM 102 or the mass storage device 104 or the like.

As described above, it is assumed that the recyclability evaluation device 10 stores the scoring table for each assembly unit operation, the conversion table for each disassembly unit operation, and the transaction price information per unit amount when trading materials. For example, by inputting the contents of each item of the product design information list from the input unit 111, the CPU 10
In 1, a disassembly operation based on a product assembly operation is set, and a total disassembly cost required for disassembly of the product is calculated using a conversion table for each disassembly operation stored in the mass storage device 104. At the same time, the total material price of the material obtained by disassembling the product is calculated using the transaction price information stored in the mass storage device 104. Furthermore, the occurrence of a profit or a loss is evaluated based on the total disassembly cost and the total material price, and the contents of the product design information list and the disassembly information list and the evaluation result of the recycling economy are output from the image output unit 113, for example. . Therefore, from the evaluation result output from the image output unit 113, as described above, it is possible to design an environment-friendly product having excellent recyclability.

Also, the CPU 101 creates a conversion table for each disassembly unit operation based on the scoring table for each assembly unit operation stored in the large-capacity storage device 104. It is not necessary to create a conversion table individually, and information required for evaluating the economics of recycling can be easily obtained.

Furthermore, if a list of parts constituting a product, a part specification, a procedure showing work procedures, and the like are also stored in the mass storage device 104, a product design information list can be automatically created. It is not necessary to input the contents of each item, and it is possible to easily output the evaluation result of the economic efficiency of recycling. Further, when the product design is changed from the input unit 111, the product design information list and the disassembly information list can be automatically updated, so that the product design information list and the disassembly information list after the design change are displayed. Since the content and the evaluation result of the economics of recycling can be output quickly from the image output unit 113,
Design changes and material changes can be made efficiently so that the product becomes an environmentally friendly product with improved recyclability.

[0040]

According to the present invention, a disassembly unit operation is set based on a work unit of a product assembling operation, a disassembly cost for each disassembly unit operation is calculated, and the disassembly cost is used to disassemble the product. The required total disassembly cost is calculated. In addition, the material price is calculated for each material obtained by disassembling the product, and the total material price is calculated from the material price for each material, and a profit or loss is generated from the total disassembly cost and the total material price. Be evaluated. For this reason, the economics of recycling can be evaluated in advance at the product design stage, and the profit and loss caused by recycling can be predicted. Further, since the disassembly cost is calculated in the disassembly unit operation, the disassembly unit operation to be improved in order to reduce the total disassembly cost can be easily determined.

In calculating the disassembly cost, the disassembly time is obtained based on the workability of the disassembly work and the number of parts.
Since the decomposition cost is calculated based on this decomposition time,
The disassembly cost can be accurately calculated without actually performing the disassembly work. In addition, using the evaluation results of economics, change processing is performed to change the material used for the product and to change the workability of the disassembly work so that the total disassembly cost is lower than the total material price. It is possible to design an eco-friendly product by improving the recyclability before starting production.

Further, the storage means stores disassembly work evaluation information for evaluating the workability of the disassembly work of the product, transaction price information for each material obtained by disassembling the product, and the like. The total disassembly cost and the total material price are calculated using the information stored in the storage means, and the occurrence of a profit or loss is evaluated by comparing the total disassembly cost and the total material price, so that efficient Evaluate the economics of recycling.

Also, since the assembling work evaluation information is stored in the storage means and the disassembly work evaluation information is created based on the assembling work evaluation information, the economics of recycling can be reduced without having to separately create the disassembly work evaluation information. Can be evaluated. In addition, since information on parts used in products and information on assembly are also stored in the storage means, even if the parts used or assembly work are changed due to a design change, the economics of recycling after the design change can be quickly evaluated. In addition, it is possible to efficiently implement design changes and material changes for environmentally friendly products with improved recyclability.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure of recyclability evaluation.

FIG. 2 is a diagram showing a product design information list.

FIG. 3 is a diagram showing a scoring table for each assembly unit operation.

FIG. 4 is a diagram showing a disassembly information list.

FIG. 5 is a diagram showing a conversion table for each disassembly unit operation.

FIG. 6 is a diagram for explaining evaluation of the economic efficiency of recycling.

FIG. 7 is a diagram illustrating a configuration of a recyclability evaluation device.

[Explanation of symbols]

10: Recyclability evaluation device, 101: CP
U, 104: mass storage device, 105: input / output interface 105, 111: input unit, 112
..Recording medium drive 113... Image output unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toru Negishi 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Mamoru Juokan 6-7-1 Kita Shinagawa, Shinagawa-ku, Tokyo No. 35 Inside Sony Corporation (72) Inventor Naoko Abe 6-7-3 Kita Shinagawa, Shinagawa-ku, Tokyo F-term inside Sony Corporation (reference) 4D004 DA16

Claims (7)

[Claims] A disassembly unit operation is set based on an operation unit of a product assembly operation, a disassembly cost for each disassembly unit operation is calculated, and a total disassembly cost required for disassembly of the product is calculated from the disassembly cost. A second calculation process of calculating a material price from a transaction price of the material for each material obtained by disassembling the product, and calculating a total material price from the material price of each material; An economic evaluation process of comparing the total disassembly cost calculated in the first calculation process with the total material price calculated in the second calculation process to evaluate the occurrence of a profit or a loss. Recyclability evaluation method. 2. In the first calculation processing, a disassembly time is obtained for each disassembly unit operation based on the workability of the disassembly work and the number of parts, and the disassembly cost is calculated using the disassembly time. The method for evaluating recyclability according to claim 1. 3. A disassembly unit operation based on a work unit of a product assembling operation, a disassembly cost for each disassembly unit operation is calculated, and a total disassembly cost required for disassembly of the product is calculated from the disassembly cost. A second calculation process of calculating a material price from a transaction price of the material for each material obtained by disassembling the product, and calculating a total material price from the material price of each material; Comparing the total disassembly cost calculated in the first calculation process with the total material price calculated in the second calculation process to evaluate the occurrence of a profit or loss; and the economic evaluation process. And a change process of changing a material used in the product or changing workability of the disassembling operation so that the total disassembly cost is lower than the total material price using the evaluation result in the above. And product design method. 4. In the first calculation processing, a disassembly time is obtained for each disassembly unit operation based on the workability of the disassembly work and the number of parts, and an disassembly cost is calculated using the disassembly time. The product design method according to claim 3, wherein 5. Storage means for storing at least disassembly evaluation information for evaluating the workability of disassembly of a product, and transaction price information for each material obtained by disassembling the product, and assembly of the product. Set the disassembly unit work based on the work unit of, calculate the disassembly cost for each disassembly unit work using the disassembly work evaluation information stored in the storage means,
The total disassembly cost required for disassembling the product is calculated from the disassembly cost, and the material price for each material obtained by disassembling the product is calculated using the transaction price information stored in the storage means. Calculating means for calculating a total material price from the material prices of the respective materials, comparing the total disassembly cost with the total material price, and evaluating the occurrence of a profit or loss; An output unit for outputting a result. 6. The storage means stores assembly work evaluation information for evaluating the workability of the product assembling work, and the arithmetic means stores the disassembly work evaluation information stored in the storage means. The recyclability evaluation apparatus according to claim 5, wherein the apparatus is created based on the assembly work evaluation information. 7. The storage means stores information on parts used in the product and information on assembly. The arithmetic means uses the stored information on parts and information on the assembly. And setting a disassembly unit operation based on an operation unit of the assembly operation of the product, and calculating the total material price from the stored information on the part and the transaction price information. Recyclability evaluation device.