Appraisal device of construction machine, appraisal method of construction machine, and appraisal program of construction machine

Abstract

To provide an appraisal device of a construction machine capable of obtaining information for appropriately determining whether or not, when a construction machine fails and the construction machine needs to be repaired, the construction machine should be repaired or replaced.SOLUTION: In an appraisal device 1 of a construction machine, an appraisal calculation part 5 appraises a construction machine buyback value which is a buyback appraisal value of an appraised construction machine being a construction machine to be appraised, and calculates a construction machine repair cost being a repair cost of the appraised construction machine, and a display part 3 displays the construction machine buyback value appraised by the appraisal calculation part 5 and the construction machine repair cost calculated by the appraisal calculation part 5 together. Further, the appraisal calculation part 5 appraises the construction machine buyback value on the basis of construction machine body information regarding the body of the appraised construction machine and construction machine repair information regarding an area of the appraised construction machine which needs to be repaired, and past information read out from a transaction information database.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a construction machine appraisal device, a construction machine appraisal method, and a construction machine appraisal program for appraisal of a construction machine. [Background technology]

[0002] Conventionally, there has been known a construction machinery appraisal system for calculating the purchase appraisal price of used construction machinery (see, for example, Patent Document 1). The appraisal system described in Patent Document 1 calculates the purchase appraisal price of, for example, a hydraulic excavator. In this appraisal system, operation information and the like detected by the hydraulic excavator can be transmitted to the construction machinery manufacturer via a communication satellite. Also, in this appraisal system, the appraisal results of the hydraulic excavator obtained by a service technician through visual inspection can be transmitted to the construction machinery manufacturer via a mobile phone.

[0003] In the appraisal system described in Patent Document 1, a history database containing information on past repairs, part replacements, etc. of hydraulic excavators, and an operation database containing operation information of the hydraulic excavator transmitted via a communication satellite are installed at a construction machinery manufacturer. In this appraisal system, the purchase appraisal price of the hydraulic excavator is automatically calculated based on the appraisal information of the service personnel transmitted to the construction machinery manufacturer by mobile phone, the history information read from the history database, and the operation information read from the operation database. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-324121 A Summary of the Invention [Problem to be solved by the invention]

[0005] A user who owns a construction machine may consider replacing the machine when the machine breaks down and must be repaired. In this case, the user may be unsure whether it is better to repair the machine or to replace it. By using the appraisal system described in Patent Document 1, it is possible to know the purchase appraisal price of the construction machine. However, it is difficult to appropriately judge whether the construction machine should be repaired or replaced based only on the purchase appraisal price of the construction machine.

[0006] Therefore, an object of the present invention is to provide a construction machinery appraisal device that can obtain information for appropriately determining whether a construction machinery should be repaired or replaced when the construction machinery breaks down and needs to be repaired.Another object of the present invention is to provide a construction machinery appraisal method and construction machinery appraisal program that can obtain information for appropriately determining whether a construction machinery should be repaired or replaced when the construction machinery breaks down and needs to be repaired. [Means for solving the problem]

[0007] In order to solve the above problems, the construction machinery appraisal device of the present invention is a construction machinery appraisal device for appraisal of construction machinery, and includes an information input unit for inputting construction machinery machine information, which is information on the machine body of the appraisal construction machinery that is the construction machinery to be appraised, and construction machinery repair information, which is information on parts of the appraisal construction machinery that require repair, an appraisal calculation unit for appraising the construction machinery purchase price, which is the appraisal value of the appraisal construction machinery, and calculating the construction machinery repair price, which is the repair cost of the appraisal construction machinery, and a display unit for displaying the construction machinery purchase price assessed by the appraisal calculation unit and the construction machinery repair price calculated by the appraisal calculation unit together, and further includes a display unit for displaying the construction machinery purchase price assessed by the appraisal calculation unit and the construction machinery repair price calculated by the appraisal calculation unit together, and a display unit for displaying the construction machinery machine purchase price assessed by the appraisal calculation unit and the construction machinery repair price calculated by the appraisal calculation unit, and further includes a display unit for displaying the construction machinery machine purchase price assessed by the appraisal calculation unit together with the construction machinery machine purchase price calculated by the appraisal calculation unit, and a display unit for displaying the construction machinery machine purchase price of construction machinery of the same type as the appraisal construction machinery that has been purchased in the past. If the machine is a traded construction machine, the system is provided with a memory unit in which a transaction information database in which a plurality of transaction information including traded construction machine body information, which is information about the body of the traded construction machine, and the purchase price of the traded construction machine, is stored, and a repair amount information database in which information about the repair amount of the construction machine is stored, and the appraisal calculation unit calculates the construction machine repair amount based on the construction machine repair information inputted by the information input unit and information read out from the repair amount information database, and assesses the purchase price of the construction machine based on the construction machine body information and construction machine repair information inputted by the information input unit and the information read out from the transaction information database.

[0008] In the construction machine appraisal device of the present invention, the appraisal calculation unit appraises the construction machine purchase price, which is the appraisal value of the appraised construction machine, and calculates the construction machine repair price, which is the repair value of the appraised construction machine, and the display unit displays the construction machine purchase price appraised by the appraisal calculation unit and the construction machine repair price calculated by the appraisal calculation unit together. That is, in the present invention, in addition to automatically appraising the construction machine purchase price and displaying the construction machine purchase price on the display unit, the construction machine repair price is automatically calculated and displayed on the display unit. Therefore, in the present invention, when a construction machine breaks down and needs to be repaired, it is possible to obtain information for appropriately determining whether the construction machine should be repaired or replaced.

[0009] In addition, in the present invention, the assessment calculation unit assesses the purchase price of the construction machine based on the construction machine body information and construction machine repair information inputted in the information input unit and the information read out from the transaction information database. That is, in the present invention, the assessment calculation unit assesses the purchase price of the construction machine taking into consideration the construction machine repair information inputted in the information input unit by the user of the assessed construction machine, etc. Therefore, in the present invention, it is possible to more appropriately assess the purchase price of the construction machine.

[0010] In the present invention, it is preferable that the information input unit further inputs construction machine operation information, which is information regarding the operation time of the assessed construction machine, and the assessment calculation unit assesses the purchase price of the construction machine based on the construction machine body information, construction machine repair information, and construction machine operation information inputted in the information input unit and the information read out from the transaction information database. With this configuration, when assessing the purchase price of the construction machine, the construction machine operation information inputted in the information input unit by the user of the assessed construction machine or the like is also taken into consideration, so that it is possible to more appropriately assess the purchase price of the construction machine.

[0011] In the present invention, it is preferable that the assessment calculation unit assesses the purchase price of the construction machine using an artificial intelligence algorithm. With this configuration, it is possible to more appropriately assess the purchase price of the construction machine.

[0012] In order to solve the above problems, the method for assessing a construction machine of the present invention is a method for assessing a construction machine for causing an assessment device to perform an assessment, and includes an information acquisition step of acquiring construction machine body information, which is information on the machine body of the assessed construction machine, which is the construction machine to be assessed, and construction machine repair information, which is information on parts of the assessed construction machine that require repairs, an assessment calculation step of assessing the construction machine purchase price, which is the purchase appraisal value of the assessed construction machine, and calculating the construction machine repair price, which is the repair cost of the assessed construction machine, and a display step of displaying the construction machine purchase price assessed in the assessment calculation step and the construction machine repair price calculated in the assessment calculation step together, and further includes a display step of displaying the construction machine purchase price assessed in the assessment calculation step together with the construction machine repair price calculated in the assessment calculation step, and displaying the construction machine repair price calculated in the assessment calculation step together with a construction machine of the same type as the assessed construction machine that has been purchased in the past. If the construction machinery thus set up is regarded as a traded construction machinery, the appraisal device pre-stores a transaction information database in which a plurality of transaction information including traded construction machinery body information, which is information regarding the body of the traded construction machinery, and the purchase price of the traded construction machinery, is stored, and a repair amount information database in which information regarding the repair amount of the construction machinery is stored, and the appraisal calculation step calculates the construction machinery repair amount based on the construction machinery repair information acquired in the information acquisition step and information read from the repair amount information database, and assesses the purchase price of the construction machinery based on the construction machinery body information and construction machinery repair information acquired in the information acquisition step and the information read from the transaction information database.

[0013] Furthermore, in order to solve the above-mentioned problems, the construction machine appraisal program of the present invention is a construction machine appraisal program for causing a computer to execute the following steps: an information acquisition step of acquiring construction machine machine information, which is information on the machine of the appraisal construction machine that is the construction machine to be appraised, and construction machine repair information, which is information on parts of the appraisal construction machine that need repair; an appraisal calculation step of assessing the purchase price of the appraisal construction machine, which is the appraisal value, and calculating the construction machine repair price, which is the repair price of the appraisal construction machine; and a display step of displaying the construction machine purchase price assessed in the appraisal calculation step and the construction machine repair price calculated in the appraisal calculation step together, and the construction machine appraisal program is a construction machine of the same type as the appraisal construction machine that has been purchased in the past. The construction machinery thus acquired is defined as a transacted construction machinery, a database in which a plurality of transaction information including transacted construction machinery body information, which is information relating to the body of the transacted construction machinery, and the purchase price of the transacted construction machinery is compiled is defined as a transaction information database, and a database in which information regarding the repair costs of the construction machinery is compiled is defined as a repair amount information database. In the appraisal calculation step, the construction machinery repair amount is calculated based on the construction machinery repair information acquired in the information acquisition step and the information read from the repair amount information database, and the purchase price of the construction machinery is appraised based on the construction machinery body information and construction machinery repair information acquired in the information acquisition step and the information read from the transaction information database.

[0014] In the present invention, in the assessment calculation step, an assessment is made of the construction machine purchase price, which is the assessed purchase price of the assessed construction machine, and a construction machine repair price, which is the repair price of the assessed construction machine, is calculated, and in the display step, the construction machine purchase price assessed in the assessment calculation step and the construction machine repair price calculated in the assessment calculation step are displayed together. That is, in the present invention, in addition to the assessment of the construction machine purchase price being automatically performed and the construction machine purchase price being displayed, the construction machine repair price is automatically calculated and displayed.

[0015] Therefore, by performing an appraisal using the construction machinery appraisal method of the present invention, when a construction machinery breaks down and needs to be repaired, it becomes possible to obtain information for appropriately determining whether the construction machinery should be repaired or replaced. Also, by executing the construction machinery appraisal program of the present invention on a computer, it becomes possible to obtain information for appropriately determining whether the construction machinery should be repaired or replaced when a construction machinery breaks down and needs to be repaired.

[0016] In addition, in the present invention, in the assessment calculation step, the purchase price of the construction machine is assessed based on the construction machine body information and construction machine repair information acquired in the information acquisition step and information read from the transaction information database. That is, in the assessment calculation step, the purchase price of the construction machine is assessed taking into account the construction machine repair information. Therefore, if an assessment is performed using the construction machine assessment method of the present invention, or if the construction machine assessment program of the present invention is executed by a computer, it becomes possible to more appropriately assess the purchase price of the construction machine. Effect of the Invention

[0017] As described above, with the construction machinery appraisal device of the present invention, when a construction machinery breaks down and needs to be repaired, it is possible to obtain information for appropriately determining whether the construction machinery should be repaired or replaced. Furthermore, by performing an appraisal with the construction machinery appraisal method of the present invention, or by executing the construction machinery appraisal program of the present invention on a computer, it is possible to obtain information for appropriately determining whether the construction machinery should be repaired or replaced when the construction machinery breaks down and needs to be repaired. [Brief description of the drawings]

[0018] [Figure 1] 1 is a block diagram for explaining a configuration of an assessment device for a construction machine according to an embodiment of the present invention. [Diagram 2] 2 is a diagram showing an example of a display screen of a display unit shown in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] (Configuration of the construction machinery assessment device) Fig. 1 is a block diagram for explaining the configuration of a construction machine assessment device 1 according to an embodiment of the present invention. Fig. 2 is a diagram showing an example of a display screen of the display unit 3 shown in Fig. 1.

[0021] The construction machinery appraisal device 1 of this embodiment (hereinafter referred to as "appraisal device 1") is a device for appraising used construction machinery (construction machines) such as hydraulic excavators, cranes, bulldozers, and wheel loaders. Specifically, the appraisal device 1 is a device for appraising construction machinery that is broken down and in need of repair. The appraisal device 1 is, for example, a dedicated computer. The appraisal device 1 is equipped with an information input unit 2 for inputting information, and a display unit 3 on which information is displayed. The information input unit 2 is a keyboard and a mouse. The display unit 3 is a display.

[0022] The information input unit 2 inputs construction machine body information, which is information about the machine body of the ACM to be assessed, which is the construction machine to be assessed, and construction machine repair information, which is information about parts of the ACM to be assessed that require repair. The information input unit 2 also inputs construction machine operation information, which is information about the operation time of the ACM to be assessed. The construction machine body information includes, for example, the manufacturer name of the ACM to be assessed, the model of the ACM to be assessed, the vehicle number of the ACM to be assessed, the year of manufacture of the ACM to be assessed, and information about the specifications of the ACM to be assessed. The construction machine repair information includes defective parts that require repair and symptoms of the defective parts. For example, "hydraulic cylinder" is input as the defective part. The construction machine operation information includes the operation time of the ACM to be assessed.

[0023] Information is input into the information input unit 2, for example, by a user who owns the construction machine ACM to be assessed. Information may also be input into the information input unit 2, for example, by a used construction machine dealer. Each piece of information is input, for example, on a screen displayed on the display unit 3 (see FIG. 2). Before the construction machine body information, construction machine repair information, and construction machine operation information are input, the construction machine type, which is the type of the construction machine ACM to be assessed, is input into the information input unit 2. For example, "hydraulic excavator" is input as the construction machine type.

[0024] If a construction machine of the same type as the assessed construction machine ACM and for which a purchase transaction has been concluded in the past is defined as a transacted construction machine TCM, the assessment device 1 is provided with a storage unit 4 in which a transaction information database in which a plurality of transaction information including transacted construction machine body information, which is information on the body of the transacted construction machine TCM, and the purchase price of the transacted construction machine TCM, is stored, and a repair cost information database in which information on the repair cost of the construction machine is stored. That is, the assessment device 1 stores the transaction information database and the repair cost information database in advance.

[0025] The already traded construction machine information includes, for example, the manufacturer name of the already traded construction machine TCM, the model of the already traded construction machine TCM, the body number of the already traded construction machine TCM, the year of manufacture of the already traded construction machine TCM, the operating hours of the already traded construction machine TCM, information on the specifications of the already traded construction machine TCM, and the purchase date of the already traded construction machine TCM. The already traded construction machine information also includes, for example, information on the world economy on the purchase date of the already traded construction machine TCM.

[0026] The information on the world economy includes, for example, exchange rate information, stock price information, and futures trading information on the purchase date of the already traded construction machine TCM. The exchange rate information includes, for example, the exchange rate of the US dollar and the exchange rate of the euro. The stock price information includes, for example, the Nikkei Stock Average, the Tokyo Stock Price Index, the New York Dow Jones Industrial Average, and the Nasdaq Composite Index. The futures trading information includes, for example, the trading price of WTI crude oil futures and the trading price of gold futures. The information on the repair cost of the construction machine includes, for example, the unit price of the replaced parts and the labor costs for replacing the parts. Note that the already traded construction machine equipment information does not need to include the manufacturer name of the already traded construction machine TCM.

[0027] The assessment device 1 also includes an assessment calculation unit 5 that assesses the construction machine purchase price, which is the assessed purchase price of the assessed construction machine ACM, and calculates the construction machine repair price, which is the repair price of the assessed construction machine ACM. The assessment calculation unit 5 calculates the construction machine repair price based on the construction machine repair information inputted by the information input unit 2 and information read out from the repair price information database. The assessment calculation unit 5 also assesses the construction machine purchase price based on the construction machine body information, construction machine repair information and construction machine operation information inputted by the information input unit 2, and information read out from the transaction information database. In this embodiment, the assessment calculation unit 5 assesses the construction machine purchase price using an artificial intelligence algorithm (machine learning algorithm).

[0028] The display unit 3 displays the construction machine purchase price assessed by the assessment calculation unit 5 and the construction machine repair price calculated by the assessment calculation unit 5 together. For example, the display unit 3 displays the construction machine purchase price and the construction machine repair price together on the screen shown in FIG.

[0029] (Method of assessing construction machinery) The appraisal device 1 appraises the appraised construction machine ACM as follows. That is, the appraisal device 1 first acquires construction machine body information, construction machine repair information, and construction machine operation information (information acquisition step). After that, the appraisal device 1 appraises the purchase price of the construction machine and calculates the construction machine repair price (appraisal calculation step). In the appraisal calculation step, the appraisal device 1 calculates the construction machine repair price based on the construction machine repair information acquired in the information acquisition step and information read from the repair price information database. Also, in the appraisal calculation step, the appraisal device 1 appraises the purchase price of the construction machine based on the construction machine body information, construction machine repair information, and construction machine operation information acquired in the information acquisition step and information read from the transaction information database. After that, the appraisal device 1 displays the construction machine purchase price assessed in the appraisal calculation step and the construction machine repair price calculated in the appraisal calculation step together (display step).

[0030] A construction machine appraisal program for executing an information acquisition step, an appraisal calculation step, and a display step is pre-installed in the appraisal device 1. The appraisal device 1 executes the information acquisition step, the appraisal calculation step, and the display step in accordance with this appraisal program.

[0031] (Main effects of this form) As described above, in this embodiment, the assessment calculation unit 5 assesses the purchase price of the construction machine and calculates the repair price of the construction machine, and the display unit 3 displays both the purchase price of the construction machine assessed by the assessment calculation unit 5 and the repair price of the construction machine calculated by the assessment calculation unit 5. That is, in this embodiment, in addition to the assessment of the purchase price of the construction machine being automatically performed and the purchase price of the construction machine being displayed on the display unit 3, the repair price of the construction machine is automatically calculated and displayed on the display unit 3. Therefore, in this embodiment, when the construction machine breaks down and needs to be repaired, it is possible to obtain information for appropriately determining whether the construction machine should be repaired or replaced.

[0032] In this embodiment, the assessment calculation unit 5 assesses the purchase price of the construction machine based on the construction machine body information, construction machine repair information, and construction machine operation information inputted in the information input unit 2, and the information read out from the transaction information database. That is, in this embodiment, the assessment calculation unit 5 assesses the purchase price of the construction machine taking into consideration the construction machine repair information inputted in the information input unit 2 by the user of the assessed construction machine ACM. Therefore, in this embodiment, it is possible to more appropriately assess the purchase price of the construction machine. In addition, in this embodiment, when assessing the purchase price of the construction machine, the construction machine operation information inputted in the information input unit 2 by the user of the assessed construction machine ACM is also taken into consideration, so that it is possible to more appropriately assess the purchase price of the construction machine. In addition, in this embodiment, the assessment calculation unit 5 assesses the purchase price of the construction machine using an artificial intelligence algorithm, so that it is possible to more appropriately assess the purchase price of the construction machine.

[0033] (Other embodiments) In the above-described embodiment, other information related to the ACM to be assessed, such as information related to the repair history of the ACM to be assessed, may be inputted by the information input unit 2. In this case, the assessment calculation unit 5 assesses the purchase price of the construction machine based on the construction machine body information, construction machine repair information and construction machine operation information inputted by the information input unit 2, other information related to the ACM to be assessed inputted by the information input unit 2, and information read out from the transaction information database.

[0034] In the above-mentioned embodiment, image data of the construction machine ACM to be assessed may be input into the appraisal device 1. In this case, the appraisal calculation unit 5 assesses the purchase price of the construction machine based on the construction machine body information, construction machine repair information, and construction machine operation information inputted in the information input unit 2, information read out from the transaction information database, and image data of the construction machine ACM to be assessed. Also, in the above-mentioned embodiment, for example, when a construction machine ACM to be assessed from a foreign country is handled, an exchange rate may be inputted in the information input unit 2. In this case, the exchange rate is also taken into consideration when assessing the purchase price of the construction machine.

[0035] In the above-mentioned embodiment, the construction machine operation information does not have to be input by the information input unit 2. In this case, the assessment calculation unit 5 assesses the purchase price of the construction machine based on the construction machine body information and construction machine repair information input by the information input unit 2 and information read from the transaction information database. In addition, in the above-mentioned embodiment, the assessment device 1 may be a PC (personal computer). In addition, the assessment device 1 may be a smartphone or a tablet. Furthermore, in the above-mentioned embodiment, the assessment calculation unit 5 may assess the purchase price of the construction machine using an algorithm other than an artificial intelligence algorithm. [Explanation of symbols]

[0036] 1. Assessment device (assessment device for construction machinery) 2 Information input section 3 Display section 4 Storage section 5. Valuation and Calculation Department

Claims

1. A construction machine assessment device for assessing a construction machine, comprising: an information input section for inputting construction machine body information, which is information about the machine body of the construction machine to be assessed, which is the construction machine to be assessed, and construction machine repair information, which is information about parts of the construction machine that need repair; an appraisal calculation unit that appraises a purchase price of the appraised construction machine and calculates a repair price of the appraised construction machine; a display unit that displays the construction machine purchase price assessed by the assessment calculation unit and the construction machine repair price calculated by the assessment calculation unit together; The system includes a storage unit that stores in advance a transaction information database in which a plurality of transaction information including information on the body of the previously traded construction machine, which is information on the body of the previously traded construction machine, and the purchase price of the previously traded construction machine, is stored, and a repair cost information database in which information on the repair cost of the construction machine is stored, where the previously traded construction machine is defined as a previously traded construction machine, and The appraisal calculation unit calculates the construction machinery repair amount based on the construction machinery repair information inputted by the information input unit and information read out from the repair amount information database, and appraises the construction machinery purchase price based on the construction machinery body information and the construction machinery repair information inputted by the information input unit and information read out from the transaction information database.

2. In the information input unit, construction machine operation information, which is information regarding the operation time of the assessed construction machine, is further input, The construction machinery appraisal device according to claim 1, characterized in that the appraisal calculation unit appraises the purchase price of the construction machinery based on the construction machinery body information, the construction machinery repair information, and the construction machinery operation information inputted in the information input unit, and information read out from the transaction information database.

3. 3. The construction machine appraisal device according to claim 1, wherein the appraisal calculation unit appraises the purchase price of the construction machine using an artificial intelligence algorithm.

4. A method for assessing a construction machine for causing an assessment device of the construction machine to perform an assessment, comprising the steps of: An information acquisition step of acquiring construction machine body information, which is information about the machine body of the assessed construction machine that is the construction machine to be assessed, and construction machine repair information, which is information about parts of the assessed construction machine that require repair; an assessment calculation step of assessing a construction machine purchase price, which is a purchase assessment value of the assessed construction machine, and calculating a construction machine repair price, which is a repair cost of the assessed construction machine; a display step of displaying the construction machine purchase price assessed in the assessment calculation step and the construction machine repair price calculated in the assessment calculation step together, If a construction machine of the same type as the assessed construction machine and for which a purchase transaction has been concluded in the past is defined as a traded construction machine, the assessment device prestores a transaction information database in which a plurality of transaction information including traded construction machine body information, which is information about the body of the traded construction machine, and the purchase price of the traded construction machine, is stored, and a repair cost information database in which information about the repair cost of the construction machine is stored, A construction machinery appraisal method characterized in that, in the appraisal calculation step, the construction machinery repair amount is calculated based on the construction machinery repair information acquired in the information acquisition step and information read from the repair amount information database, and the purchase price of the construction machinery is appraised based on the construction machinery body information and the construction machinery repair information acquired in the information acquisition step and information read from the transaction information database.

5. An information acquisition step of acquiring construction machine body information, which is information about the machine body of the assessed construction machine that is the construction machine to be assessed, and construction machine repair information, which is information about parts of the assessed construction machine that require repair; an assessment calculation step of assessing a construction machine purchase price, which is a purchase assessment value of the assessed construction machine, and calculating a construction machine repair price, which is a repair cost of the assessed construction machine; a display step of displaying the construction machine purchase price assessed in the assessment calculation step and the construction machine repair price calculated in the assessment calculation step together, A construction machine of the same type as the assessed construction machine and for which a purchase transaction has been concluded in the past is defined as a traded construction machine, a database in which multiple pieces of transaction information including traded construction machine machine body information, which is information about the body of the traded construction machine, and the purchase price of the traded construction machine, are stored as a transaction information database, and a database in which information about the repair costs of construction machines is stored as a repair cost information database. A construction machinery appraisal program characterized in that, in the appraisal calculation step, the construction machinery repair amount is calculated based on the construction machinery repair information acquired in the information acquisition step and information read from the repair amount information database, and the purchase price of the construction machinery is appraised based on the construction machinery body information and the construction machinery repair information acquired in the information acquisition step and information read from the transaction information database.

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