Estimation system

Abstract

To provide a system that facilitates creation of an estimate by a craftsman or a building firm or the like.SOLUTION: An estimation system comprises: a craftsman side device 4 used by a craftsman or the like; a commodity order acceptance side device 5 proving materials; and a management server 2 connected to the craftsman side device 4 and the commodity order acceptance side device 5 via a network. In the management server 2, a database related to material information held by the commodity order acceptance side device 5 is implanted. The craftsman side device 4 is capable of browsing the material information by accessing the management server 2. In addition, the craftsman side device 4 can create an estimate necessary for construction, on the basis of the browsed material information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention is a system for matching users who wish to remodel with contractors. The estimation system used in Regarding. [Background technology]

[0002] The renovation intermediation system described in Patent Document 1 is a system for acting as an intermediary between renovation requesters who request renovations related to real estate properties online and renovation contractors.

[0003] The renovation intermediation system described in Patent Document 1 has a means for registering a request for a renovation estimate, an output means for outputting the contents of the request for a renovation estimate to a registered renovation contractor, a means for registering estimates from renovation contractors in response to the request for a renovation estimate, and a means for registering order information in response to a renovation contractor being selected from among the renovation contractors who have registered estimates.

[0004] In addition, the remodeling intermediary system can be configured to output the contents of the remodeling estimate request only to registered remodeling contractors who can carry out the remodeling specified in the remodeling estimate request. In addition, since the remodeling estimate request expresses the client's image of the construction, the remodeling intermediary system can be configured to include information on remodeling examples to be referred to. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. WO01 / 048644 Summary of the Invention [Problem to be solved by the invention]

[0006] The conventional renovation intermediation system of Patent Document 1 is capable of matching users who wish to renovate with contractors. However, after matching, the contractors must arrange for the materials to be used in the renovation themselves. For this reason, contractors are often corporations, such as construction companies or lumber stores, that can easily obtain materials.

[0007] However, in actual renovations, construction companies often outsource work to individual carpenters and craftsmen of various kinds. For small-scale renovations, it may be cheaper to order directly from a craftsman. However, craftsmen may have difficulty obtaining materials.

[0008] However, some users may find it difficult to place orders with construction companies, so it would be good if construction companies had a system that made it easy for users to place orders directly with them.

[0009] Yu A system that allows users to directly request renovation work from craftsmen (carpenters, various craftsmen, individuals who are good at DIY, etc.; the same applies below) and construction companies. It would be ideal if such a system existed, but in that case, it would be a hassle for craftsmen, construction companies, etc. to prepare estimates. Therefore, an object of the present invention is to provide a system that makes it easy for craftsmen, construction companies, etc. to create estimates. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention has the following features. The present invention is an estimate system for linking a construction contractor and a material provider, and includes a contractor-side device used by the contractor, a product order-receiving device that provides materials, and a management server connected to the contractor-side device and the product order-receiving device via a network. A database related to material information held by the product order-receiving device is installed in the management server. The contractor-side device can access the management server and view the material information. The contractor-side device can create an estimate required for the construction based on the viewed material information. This specification also includes the following inventions. The present invention is a renovation matching system for matching construction clients with construction contractors, and includes a user-side device used by the client, a contractor-side device used by the contractor, a product order-receiving device that receives orders for materials, and a management server connected to the user-side device, contractor-side device, and product order-receiving device via a network. The user device can input the details of the work to be requested to the management server and request an estimate. The management server can allow the contractor's device to view the request for estimate. In response to the request for an estimate, the contractor's device can transmit an estimate for the work to the management server. The user device can view the estimate submitted to the management server. The user side device can select a contractor to be commissioned to carry out the construction work from among the submitted estimates. The management server notifies the selected installer's device of the selection. The builder side device can place an order for materials to be used in the construction work to the product order receiving side device via the management server based on the material information applied by the client side device.

[0011] Preferably, the builder-side devices are craftsman-side devices used by carpenters, craftsmen, and individuals, or enterprise-side devices used by enterprises.

[0012] Preferably, the user-side device and the installer-side device are capable of communicating with each other through chat or video calling via the management server.

[0013] Preferably, the user device is capable of registering an evaluation of the installer in the management server.

[0014] Preferably, the contractor's device is capable of registering the construction results of the construction work in the management server.

[0015] Preferably, the contractor's device is capable of designating a recipient of the ordered materials.

[0016] Preferably, the receiving location is a home improvement store.

[0017] Preferably, the management server is capable of grasping the contents of the quotation request input from the user-side device, selecting a contractor suited to the requested contents, and proposing the contractor to the user-side device.

[0018] Preferably, the management server is capable of understanding the details of the quotation request input from the user side device and creating a provisional quotation based on past performance.

[0019] Preferably, the management server has the contractor's device register a schedule, grasps the details of the request for quotation input from the user's device, calculates the number of days for construction from the grasped details of the request for quotation, and suggests contractors with available schedules to the user's device based on the calculated number of days for construction. Effect of the Invention

[0020] According to the present invention, This will provide a system that makes it easy for craftsmen, construction companies, etc. to create estimates. In addition, other According to the invention, since a user requests an estimate and a builder responds with an estimate accordingly, it is possible to provide a system in which the user can directly request renovation work from a construction company, craftsman, etc. Also, since the builder side device can order materials to be used in the work from the product order side device via the management server based on the material information applied by the client side device, it is possible to provide a system in which construction companies, craftsmen, etc. can easily obtain materials.

[0021] If users can connect with contractors via chat or video calls, they can hold detailed discussions about the details of the work.

[0022] If a user evaluates a builder, this serves as a reference for other users when placing orders with the builder.

[0023] If a contractor can register their construction record in the management server, users can refer to it when placing an order.

[0024] By allowing the contractor to specify the location where the materials are to be received, they can receive them at a location that is convenient for them.

[0025] By having a home improvement store as the receiving destination, the materials can be mixed into regular logistics, which reduces costs.

[0026] The management server selects a contractor based on the contents of the estimate, eliminating the user's confusion about who to request.

[0027] By having the management server create a provisional estimate, the user or contractor can know the market price, making it possible to conduct a transaction at a fair price.

[0028] The management server optimizes the schedule, so that work can be assigned to available workers. This also leads to faster construction, which is beneficial for users.

[0029] These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a diagram showing the overall concept of a reform matching system according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a flow chart showing the operations from initial registration to receipt of a quote in the user side device 1. [Diagram 3] FIG. 3 is a flowchart showing the operations from the initial registration to the submission of an estimate in the company-side device 3 or the craftsman-side device 4. [Figure 4] FIG. 4 is a flow chart showing the operation of the user device 1 from receipt of a quotation to placing an order. [Diagram 5] FIG. 5 is a flow chart showing the operation from the submission of an estimate to the receipt of an order in the company device 3 or the craftsman device 4. [Figure 6] FIG. 6 is a flow chart showing the operation of the company side device 3 or the craftsman side device 4 from ordering materials to completing the work. [Figure 7]FIG. 7 is a flow chart showing the operation of the goods order receiving device 5 from ordering materials to shipping the materials. [Figure 8] FIG. 8 is a flowchart showing the operation of the user side device 1 for evaluation after the completion of the work. [Figure 9] FIG. 9 is a flowchart showing the operation from quotation to settlement in the management server 2. [Figure 10] FIG. 10 is a flowchart showing the operation of the management server 2 for optimizing matching. [Figure 11] FIG. 11 is a flowchart showing the operation of automating quotation in the management server 2. [Figure 12] FIG. 12 is a flowchart showing the operation of optimizing a schedule in the management server 2. [Figure 13] FIG. 13 is a flowchart showing the operation of the management server 2 for collecting big data. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Referring to FIG. 1, in one embodiment of the present invention, Includes quotation system The overall concept of the renovation matching system will now be described. Note that the renovation referred to in this specification is not limited to major renovations, but also includes simple renovations such as installing shelves and handrails, plumbing, and partial painting.

[0032] In Figure 1, the renovation matching system includes one or more user-side devices 1, one or more management servers 2, one or more company-side devices 3, one or more craftsman-side devices 4, one or more product order-receiving devices 5, one or more receiving stores 6, and one or more construction sites 7, all interconnected via a wired or wireless network not shown. The craftsman side device 4 and the product order receiving side device 5 constitute an estimate system.

[0033] These devices may be computer devices such as personal computers, server devices, smartphones, tablet devices, information processing terminals, etc., and the form is not limited. These devices are equipped with the basic elements of a computer device, that is, a control unit, a storage unit, an input unit, an output unit, and a communication unit. The system of this embodiment is realized by installing a computer program for realizing the operations described below in each computer device.

[0034] A user who wishes to remodel can operate the user-side device 1 to browse registered contractors, input details of the work and photos of the desired part, input a desired schedule for the work, request an estimate, select a contact, negotiate using chat and / or video calling functions, make a contract, place an order, make a payment, receive a report of the completion of the work, evaluate the contractor, etc. These operations may be realized by the user-side device 1 by installing a dedicated application on an information processing terminal, or may be realized by being provided in the form of a web application, or may be realized by other well-known methods.

[0035] The enterprise device 3 is a computer device used by contractors who undertake renovation work as part of corporate organizations, such as construction companies, lumber stores, and various specialized businesses (hereinafter collectively referred to as "construction companies, etc."). The enterprise device 3 will be referred to as Type A here. Type A does not require that a business have legal personality, but businesses registered in the system as Type A often do have legal personality.

[0036] The craftsman-side device 4 is a computer device used by carpenters, various craftsmen, individuals skilled in DIY (hereinafter collectively referred to as "craftsmen, etc."), etc. The craftsman-side device 4 will be referred to as Type B here. Note that, in order to include individuals skilled in DIY, Type B does not require that a personal business notification has been filed for tax purposes.

[0037] The reason for dividing the work into type A and type B is as follows. Craftsmen usually work on commission from construction companies and the like. However, if there are no requests from construction companies and the like, the craftsmen will have no work. Therefore, when there is no work, the system of this embodiment is used to directly connect with users who wish to remodel, so that work can be distributed to the craftsmen of type B.

[0038] In this specification, "construction companies, etc." and "craftsmen, etc." will collectively be referred to as "businesses."

[0039] The construction company etc. and the craftsmen etc. can operate the company side device 3 and the craftsman side device 4 to view the construction request details entered by the user, research materials, submit estimates, negotiate using chat function and / or video call function, make contracts, receive orders, order materials, make payments, create construction completion reports, etc. These operations may be realized by installing a dedicated app on the information processing terminal of the company side device 3 and the craftsman side device 4, or may be realized by being provided in the form of a web app, or may be realized by other well-known methods.

[0040] The management server 2 has a function of mediating between the user side device 1 and the company side device 3 and the craftsman side device 4. In addition, the management server 2 can provide material information, issue ordering instructions, shipping instructions, settlement, etc., between the product order receiving device 5 and the management server 2.

[0041] The product order receiving device 5 is a computer device used, for example, by a major building material manufacturer, the headquarters of a home improvement store, etc. The product order receiving device 5 receives an order for materials (materials means products, building materials, etc.) in response to instructions from the management server 2, and delivers the materials to a specified delivery destination.

[0042] The shipping destination is a location designated by the construction company or the like (the construction site 7 or the location of the construction company) or a receiving store 6 designated by the craftsman or the like (such as a nearby home improvement store).

[0043] Based on the above system overview, the flow from matching a user with a construction company or the like and craftsmen or the like to settlement will be described with reference to FIGS.

[0044] 2, the user-side device 1 installs a dedicated application (S101) and initially registers various personal information of the user (S102). Note that if the system is provided by a web application, there is no need to install the application.

[0045] Next, the user side device 1 transmits the details of the work input by the user and a photo of the work site to the management server 2 (S103). The details of the work request should be in an easy-to-understand selection format such as wallpaper replacement, kitchen replacement, bathtub replacement, shelf installation, etc., so that the user can easily understand. It is also preferable that information such as the area and size can be input.

[0046] Next, the user side device 1 obtains various information from the management server 2 in response to the user's browsing of the registered traders, and displays it so that it can be browsed (S104). Next, the user side device 1 prompts the user to select whether to request a quote from type A, type B, or both (S105).

[0047] In addition, the range of selection can be limited by various criteria, such as years in business, number of construction projects completed in the past, or individuals who are good at carpentry or DIY.

[0048] Then, the user side device 1 transmits a request for quotation to the management server 2 based on the result of the selection made in S105 (S106).

[0049] When the request for quotation is sent, the management server 2 notifies the selected trader (selected traders of type A or type B, or selected traders of type A and type B) that a request for quotation has been received, so there is a possibility that the trader may ask questions prior to the quotation. For this reason, the management server 2 allows chat or video call communication between the user side device 1 and the trader until the quotation is submitted (S107), but this is not essential.

[0050] Next, the user side device 1 receives the estimate sent from the business and allows the user to view it (S108).

[0051] In FIG. 3, the company side device 3 or the craftsman side device 4 (if both the company side device 3 and the craftsman side device 4 are used, it would be "and" instead of "either", but since the system will at least operate if either one of them is participating in the system, it is written as "or" here. The same applies below.) is used by the construction company etc. or craftsman etc. to initially register various information (location, contact information, past performance, price list, profile, self-promotion, whether they have qualifications, past training performance, past accident status, etc.) (S201).

[0052] Next, the company-side device 3 or the craftsman-side device 4 displays the contents of the quotation request submitted by the user so that the contents can be viewed (S202).

[0053] Next, the company side device 3 or the craftsman side device 4 allows the construction company or craftsman to select the construction for which they wish to submit an estimate (S203). Of course, if there is no construction for which they wish to submit an estimate, the process ends with the viewing in S202.

[0054] After S203, the company side device 3 or the craftsman side device 4 can communicate with the user side device 1 by chat or video call to ask various questions until the quotation is submitted (S204). However, this function is optional because the user may be overwhelmed by communicating with many businesses.

[0055] The company side device 3 or the craftsman side device 4 can search and investigate the materials and prices provided by the product order receiving device 5 (S205).

[0056] After the above operations, the construction company or craftsman determines the estimated price. The company side device 3 or craftsman side device 4 has the construction company or craftsman input the estimate, and transmits the determined estimate to the management server 2 (S206).

[0057] 2 causes requests for quotation to accumulate in the management server 2, and by the operation of Fig. 3, quotations corresponding to the requests for quotation are accumulated in the management server 2. The management server 2 collects these requests for quotation and the corresponding quotations.

[0058] 4, the user-side device 1 receives an estimate stored in the management server 2 (S301). The user-side device 1 allows the user to view various information such as the track record of the company that submitted the estimate (S302).

[0059] Next, the user side device 1 prompts the user to select a vendor and asks whether or not to place an order (S303).

[0060] After the inquiry, the user-side device 1 communicates with the company-side device 3 or the craftsman-side device 4 by chat or video call via the management server 2 (S304). However, this operation is optional.

[0061] Finally, when the user has decided on an ordering company, the user side device 1 notifies the management server 2 of the decided ordering company (S305).

[0062] Then, after communication between the user and the contractor, the user-side device 1 determines the construction date and specific order contents (such as specifications and price), and transmits the determined construction date and order contents to the management server 2 (S306).

[0063] Then, by using a general-purpose or dedicated electronic contract system, the user device 1 concludes a contract with the vendor through the management server 2 or through another server (S307), and notifies the management server 2 of the intention to place an order with the vendor (S308).

[0064] 5, the enterprise side device 3 or the craftsman side device 4 receives an inquiry from the user side device 1 (S401). In response to this, and also as an optional operation, the enterprise side device 3 or the craftsman side device 4 can communicate with the user side device 1 by chat or video call via the management server 2 (S402).

[0065] When the user decides to place an order with the trader, the management server 2 sends an order decision notification to the trader's company device 3 or craftsman device 4. The company device 3 or craftsman device 4 receives the order decision notification (S403).

[0066] After that, the company-side device 3 or the craftsman-side device 4 communicates with the user-side device 1 through chat or video call to determine the construction date and order contents (S404).

[0067] Then, by using a general-purpose or dedicated electronic contract system, the company device 3 or the craftsman device 4 concludes a contract with the user through the management server 2 or through another server (S405), and notifies the management server 2 that it has received an order from the user (S406).

[0068] Through the operations shown in FIGS. 4 and 5, the order placement and receipt are finalized.

[0069] In Fig. 6, after the trader checks the site (S501), the company side device 3 or the craftsman side device 4 has the trader select the final materials (S502). The material selection is made by browsing the material information registered by the product order side device 5.

[0070] Once the selection of materials has been completed, the company side device 3 or the craftsman side device 4 causes the materials to be ordered (S503), confirms the order (S504), and uses the management server 2 or another server to execute payment using various payment methods such as credit card, other electronic payment, direct debit, account transfer, etc. (S505).

[0071] The company side device 3 or the craftsman side device 4 receives the order confirmation notification from the management server 2 (S506). After that, when the product order receiving side device 5 transmits a notification to the management server 2 that the product has been shipped, the management server 2 notifies the company side device 3 or the craftsman side device 4 of the product shipment, and the company side device 3 or the craftsman side device 4 also receives the product shipment notification (S507).

[0072] Thereafter, when the materials arrive at the specified delivery destination, the product order-receiving device 5 uses a dedicated or existing system to send an arrival notification to the management server 2, and the management server 2 sends an arrival notification to the company-side device 3 or the craftsman-side device 4, which also receives the arrival notification (S508).

[0073] The contractor receives the materials at the specified delivery address (S509) and carries out the work at the location specified by the user.

[0074] After the work is completed, the company-side device 3 or the craftsman-side device 4 causes the contractor to post the work results to the management server 2 (S510). However, this operation is optional.

[0075] The operation of the product order receiving device 5 will be described with reference to Fig. 7. After initially registering company information and the like (S601), the product order receiving device 5 registers information on materials held by the company in the management server 2 (S602). This registration may be performed manually, but when there are a large number of items, this is difficult. Therefore, it is preferable to perform registration by porting the existing database held by the product order receiving device 5 to the management server 2.

[0076] In addition, here, product registration is performed in the management server 2, but the management server 2 may also be linked to an online shopping site operated by the product order receiving device 5, so that material orders can be placed and received.

[0077] After the materials are registered, the product order receiving device 5 receives an order from the company side device 3 or the craftsman side device 4, and notifies the management server 2 of the order receipt (S603).

[0078] The settlement in S604 may be performed directly between the product order receiving device 5 and the company device 3 or the craftsman device 4, or may be performed via the management server 2.

[0079] Then, the product order receiving side device 5 sends the materials and notifies the sending of the materials to the company side device 3 or the craftsman side device 4 via the management server 2 (S605).

[0080] The product order receiving device 5 notifies the company device 3 or the craftsman device 4 of arrival at the specified location via the management server 2 (S606, S607).

[0081] As shown in FIG. 8, after the construction is completed, the user device 1 executes payment settlement to the contractor via the management server 2 (S701), and evaluates the construction work by the contractor using the number of stars and comments (S702).

[0082] The user may make payment in multiple installments, such as before work begins and after completion.

[0083] In the above explanation, the operation of the management server 2 has been explained where appropriate. With reference to FIG. 9, the operation of the management server 2 from quotation to settlement will be explained, focusing on the information to be stored.

[0084] First, the management server 2 stores the initial registration of the user and the vendor (S801). The management server 2 stores the material information from the product order receiving device 5 (S802). The management server 2 stores the contents of the quotation request (S803). The management server 2 stores the quotation (S804).

[0085] In this way, the management server 2 appropriately stores information. Needless to say, when storing information, the management server 2 stores various pieces of information in association with users, vendors, and product order vendors.

[0086] The management server 2 then provides chat or video calling to enable communication between the user-side device 1 and the enterprise-side device 3 or the craftsman-side device 4 (S805).

[0087] In addition, the management server 2 provides an electronic contract system to the user side device 1 and the company side device 3 or the craftsman side device 4 so that the electronic contract system can mediate the conclusion of the contract (S806). However, the electronic contract system may utilize an external system.

[0088] The management server 2 also provides a settlement system between the user side device 1 and the company side device 3 or the craftsman side device 4 (S807). The management server 2 receives payment from the user side device 1 according to the estimated amount. The management server 2 then deducts a commission fee from the amount received and pays the remaining amount to the trader. However, it is optional whether or not to deduct the commission fee. The management server 2 may also collect a commission fee at the time of settlement for the purchase and sale of materials. Furthermore, the system operation costs may be covered by a fixed registration fee from the trader.

[0089] The management server 2 stores the evaluation information of the contractor input by the user side device 1 (S808). The management server 2 also stores the construction results input by the company side device 3 or the craftsman side device 4 (S809).

[0090] The above-described operations of the user-side device 1, the company-side device 3, the craftsman-side device 4, the management server 2, and the product order-receiving device 5 make it possible to provide a renovation matching system.

[0091] According to this system, the participation of construction companies and the like is permitted, but it may also be possible to restrict the participation of construction companies and the like and allow only craftsmen and the like to participate. In either case, since craftsmen and the like can directly accept orders for renovations from users, it is expected that users will be able to order renovations at a relatively reasonable price while checking the capabilities of craftsmen and the like, excluding the commission fee acquired by this system. It also becomes easier for craftsmen, construction companies, and other contractors to make estimates.

[0092] Next, a modified example of the operation of the management server 2 will be described.

[0093] As shown in FIG. 10, the management server 2 can perform matching optimization.

[0094] When the management server 2 receives a request for quotation (S901), it grasps the contents of the request for quotation (S902). For example, if the user is allowed to select a certain number of options when inputting the request for quotation, such as wallpaper replacement, kitchen replacement, bathroom replacement, shelf installation, area, size, etc., it is possible to grasp the contents of the request for quotation.

[0095] Then, the management server 2 selects a contractor that is suitable for the contents of the quotation request based on past performance (S903). The selection method can be realized by determining selection criteria based on accumulated data, such as contractors with a lot of performance in the construction of the contents of the quotation request that have been grasped, contractors close to the user's location, contractors with high evaluations, contractors with low prices, etc.

[0096] In this way, the management server 2 proposes the recommended business operators selected by the management server 2 to the user side device 1 (S904).

[0097] In this way, optimal matching may be performed by the management server 2. Optimal matching may also be performed using artificial intelligence.

[0098] Next, the automation of quotation will be described.

[0099] 11, a request for creating a provisional estimate is sent to the management server 2 from the user device 1, company device 3, or craftsman device 4 (S1001). The management server 2 comprehends the contents of the estimate request (S1002). This comprehension can be realized by allowing the user or contractor to select, to a certain extent, when inputting the estimate request, whether the request is for wallpaper replacement, kitchen replacement, bathroom replacement, installation of shelves, area, size, region, etc.

[0100] Then, the management server 2 extracts estimates for similar work content, area, etc. based on the results of past estimates, creates a tentative estimate (S1003), and transmits it to the user side device 1, the company side device 3, or the craftsman side device 4 (S1004).

[0101] In this way, the management server 2 can create provisional estimates in response to requests from users and contractors. Therefore, a user can obtain a provisional estimate before requesting an estimate from a contractor, understand the market price, and use the information to secure a budget and determine the necessity of construction. Also, a contractor can view the provisional estimate to understand the market price and determine the amount of the estimate he or she will submit.

[0102] The creation of provisional estimates may be achieved using artificial intelligence.

[0103] Next, schedule optimization will be described.

[0104] The management server 2 causes the company side device 3 or the craftsman side device 4 to register the schedule (S1101). This allows the management server 2 to grasp the availability of the contractor.

[0105] Next, the management server 2 grasps the contents of the estimate request from the user (S1102), and calculates the number of days for construction from the contents (S1103). As mentioned repeatedly above, when the contents of the estimate are grasped, the number of days for construction can be roughly calculated from past results.

[0106] Then, the management server 2 recognizes a contractor who has availability based on the calculated number of days for construction (S1104).Then, the management server 2 suggests a contractor who has availability in the schedule to the user side device 1, or notifies the company side device 3 or craftsman side device 4 who has availability in the schedule that a quote request has been received.

[0107] Schedule optimization can also be achieved using artificial intelligence.

[0108] Next, the collection of big data will be described.

[0109] The management server 2 stores the order history in association with the attributes of the user, the vendor, etc. (S1201).

[0110] The management server 2 stores the construction history in association with the attributes of the user, contractor, etc. (S1202).

[0111] The management server 2 stores the estimate history of the construction work (S1203).

[0112] The management server 2 stores the history of the work and the history of the ordered materials (S1204).

[0113] The management server 2 stores the accident history (complaints, construction errors, etc.) (S1205).

[0114] The management server 2 may use this stored information to improve the system's functions in the future, or may provide it to third parties as big data in a form in which private information is not identified.

[0115] In addition, the users described above are clients, and contractors such as construction companies and craftsmen are builders, so we will express them conceptually in that way.

[0116] In addition, since it is difficult to define what constitutes a renovation, we will conceptualize renovation as construction work.

[0117] In addition, in the above embodiment, the device used by the builder is the company-side device 3 or the craftsman-side device 4, but it will be conceptually expressed as the builder-side device.

[0118] It should be noted that all or part of the control described above may be controlled by blockchain technology.

[0119] Although the present invention has been described in detail above, the above description is merely illustrative of the present invention in every respect and is not intended to limit the scope of the present invention. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. Each of the constituent elements of the invention disclosed in this specification is considered to be an independent invention. Inventions in which each of the constituent elements is combined in any combination method are also included in the present invention. [Industrial Applicability]

[0120] The present invention relates to Quotation The present invention is a system and can be industrially applied. [Explanation of symbols]

[0121] 1. User device 2 Management Server 3 Company equipment 4. Craftsman's equipment 5. Product order receiving equipment 6. Pick-up store 7 Construction site

Claims

[Claim 1] An estimate system for linking construction contractors and material suppliers, comprising: A constructor-side device used by the constructor; A product order receiving device that provides the material; A management server is provided which is connected to the constructor device and the product order receiving device via a network, The management server is provided with a database of material information held by the product order receiving device, The contractor-side device is capable of accessing the management server and viewing the material information, An estimate system, characterized in that the builder's device is capable of creating an estimate required for construction work based on the viewed material information.

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