Soil-purification work managing system

Abstract

To solve a problem that there is, in soil-purification work, a risk that it is impossible to determine a purification method unless digging is performed and an initial budget is exceeded if an unexpected contaminant is found in the process of work.SOLUTION: A land purification-work managing system has: a contract managing section that, if there are an insurer who compensates for a difference between an initial estimate and a total amount of implementation, a financial operator who lends cost for every work, a client and a constructor, confirms a contract with the client at an initially-estimated total amount agreed between the insurer and the constructor; an investigation managing section that replaces an initially-estimated investigation cost with an actual investigation cost according to a progress of investigation work and, if a total amount of payment seems to become greater than the initially-estimated total amount, makes notification to the insurer; a construction managing section that replaces an initially-estimated construction cost with an actual construction cost according to the progress of investigation work for purification work and, if a supposed cumulative amount of implementation seems to become greater than the initially-estimated total amount, makes notification to the insurer; and a settlement managing section that notifies the client of a final amount of payment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a system for managing the flow of funds related to the progress of soil remediation work among four parties: the client who requests the work, the contractor who undertakes the work, the financier who lends funds to the client, and the insurer who compensates for the difference if the actual cost of the work is higher than the total amount originally estimated. [Background technology]

[0002] If the soil of a piece of land is contaminated, it cannot be traded as is, and the landowner must clean up the soil. Patent Document 1 provides a system for evaluating contaminated land to calculate the cost of soil cleanup and to evaluate the subsequent selling price of the land. This system evaluates the soil contamination of the target land based on the information stored in the evaluation database and the soil contamination information.

[0003] However, soil contamination also penetrates in the depth direction. Therefore, soil remediation of contaminated land requires an on-site survey and an estimate of the necessary remediation work. Furthermore, when remediation work is actually carried out, a contaminated layer that was not detected in the survey is discovered, and the owner's funds may not be sufficient to cover the costs.

[0004] To solve this problem, in recent years, soil remediation has been carried out in some cases with the cooperation of not only the client and construction company, but also financial companies that raise funds and insurance companies that provide compensation if construction work is required beyond the planned funds. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-016232 Summary of the Invention [Problem to be solved by the invention]

[0006] Soil remediation work is divided into two stages: investigation work and remediation work. In other words, the three stages - the initial estimate before work begins, the construction estimate after investigation work is completed, and the actual costs incurred during the actual work - can fluctuate as the work progresses. Therefore, even if the insurance company guarantees the maximum amount, the client may have doubts that the work was completed at a total cost less than the funds prepared.

[0007] On the other hand, insurance companies were concerned about whether actual costs would exceed the initial estimated funds. In other words, there was a strong demand to clarify the difference between the initial funds and the final actual costs as the construction progressed. [Means for solving the problem]

[0008] The present invention was conceived in light of the above-mentioned demands, and provides a soil remediation work management system that visualizes the comparison between the initial estimated total cost and the estimated actual cost (provided as the estimated total implementation cost) as the soil remediation work progresses, and presents this information to the client, construction company, financial company, and insurance company.

[0009] More specifically, the soil remediation work management system according to the present invention includes: A soil remediation work management system is provided in which a client CL, who has an insurer IN that compensates for the maximum amount of soil remediation work consisting of an investigation process in which investigation work PSk is performed on land L before soil remediation and a construction process in which remediation work PCk is performed, and a financier FN that lends the cost of the soil remediation work, manages the soil remediation work that the client CL requests from a contractor AG, A contract management department that calculates an initial total estimate EΣ consisting of an initial estimated survey cost EvSk and an initial estimated construction cost EvCk from the contractor estimate Ect calculated based on the contractor database AGDB held by the contractor AG and the insurer estimate Ein calculated based on the insurer database INDB held by the insurer IN, and confirms the contract for the construction work with the client CL; The estimated total cost CEΣ is calculated by replacing the initial estimated survey cost EvSk in the initial estimated total cost ES with the actual survey cost RSk of the survey work PSk, Based on the results of the survey work PSk, the initial estimated construction cost EvCk in the estimated total construction cost CEΣ is replaced with the revised estimated construction cost ECk to update the estimated total construction cost CEΣ, The actual survey cost RSk is added to the estimated implementation amount XE, An investigation management department that reports the investigation process and notifies the client CL of at least the estimated total cost CEΣ; The estimated total construction cost CEΣ is updated by replacing the revised estimated construction cost ECk in the estimated total construction cost CEΣ with the actual construction cost RCk, The implementation cost RCk is added to the estimated implementation amount XE, A construction management department that reports the construction process and notifies the client CL of at least the estimated total construction cost CEΣ; an insurance management unit that notifies at least the insurer IN when the estimated total construction cost CEΣ in the survey management unit and the construction management unit becomes larger than the initial estimated total cost ES; The system is characterized by having a settlement management unit that notifies the client CL of the smaller of the initial estimated total amount EΣ and the accumulated implementation amount XE that has become equal to the estimated implementation total amount CEΣ as the final billing amount TR. [Effects of the Invention]

[0010] The soil remediation work management system of the present invention makes up the initial total estimate EΣ, which is the estimate of the investigation cost EvSk and the initial estimated construction cost EvCk, which are estimates for the investigation work and remediation work, and as the work progresses, the estimated amount is replaced with the actual cost, thereby visualizing the total actual cost at the end of the work.This allows the client to always know whether the work is progressing as planned and whether there is a surplus in the budget.

[0011] In addition, insurance companies and financial companies can learn information as the construction progresses, such as whether they need to prepare insurance money and how much money they will need to lend until the construction is completed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing the relationship between the client, the contractor, the financier, and the insurer surrounding the soil remediation construction management system according to the present invention. [Figure 2] This is a diagram showing the schedule for soil remediation work. [Figure 3] FIG. 2 is a diagram showing the internal configuration of a soil remediation work management system. [Figure 4] FIG. 2 is a flow chart showing the overall processing of the soil remediation work management system. [Figure 5] FIG. 10 is a flow diagram showing the processing of a contract management step. [Figure 6] This is a diagram showing the change from the initial estimated total amount to the expected actual total amount using an equation. [Figure 7] This is a graph showing the change from the initial estimated total amount to the expected actual total amount. [Figure 8] FIG. 10 is a flow chart showing the processing of the investigation management step. [Figure 9] FIG. 10 is a flow chart showing the initial setting process of the investigation management step. [Figure 10] FIG. 10 is a flow chart showing other calculation processes in the investigation management process. [Figure 11] FIG. 10 is a flow diagram showing processing of expense-related notifications in the investigation management process. [Figure 12] 10 is a graph showing the transition of the estimated total implementation amount to the accumulated implementation amount. [Figure 13] FIG. 10 is a flow chart showing the processing of the construction management process. [Figure 14] FIG. 10 is a flowchart showing the process of calculating other items in the construction management process. [Figure 15] FIG. 10 is a flow diagram showing processing of cost-related notifications for a construction management process. [Figure 16] FIG. 10 is a flowchart showing the processing of a settlement management step. DETAILED DESCRIPTION OF THE INVENTION

[0013] The soil remediation work management system according to the present invention will be described below with reference to drawings and examples. Note that the following description illustrates one embodiment and one example of the present invention, and the present invention is not limited to the following description. The following description can be modified within the scope of the present invention.

[0014] Figure 1 shows the surrounding relationship of a soil remediation work management system 1 according to the present invention. A client CL owns land L. Or, they may be an agent for the owner of land L. However, this land L has soil contamination. If the client CL wishes to resell this land L, they will have to remediate the soil of this land L before reselling it.

[0015] The contractor AG is a business operator capable of carrying out soil remediation. It is usually a construction company. It is requested by the client CL to carry out soil remediation work, and carries out the work. The soil remediation work management system 1 (hereinafter simply referred to as the "management system 1") is built on a server 50 owned by the contractor AG. The contractor AG receives interim costs from the client CL as the work progresses.

[0016] Generally, such work is very expensive, and there is a possibility that unexpected contaminants will be discovered and additional costs will be incurred for remediation if the soil remediation work is actually carried out. From the client's perspective, if there is a possibility that such a situation may occur, it will be difficult to proceed with soil remediation work.

[0017] When such a situation occurs, the insurer IN is responsible for compensating for any amount exceeding the original total estimate EΣ. In other words, the insurer IN receives the insurance premium from the client CL and pays the insurance claim for any amount exceeding the original total estimate EΣ. The insurer IN usually corresponds to an insurance company. The original total estimate EΣ is the amount agreed upon between the contractor AG and the insurer IN, presented to the client CL, and contracted by the client CL for the soil remediation work. In other words, it is an estimate prepared before the soil remediation work begins.

[0018] The financier FN also plays a role in providing loans to cover the costs incurred during the soil remediation work. The financier FN will receive repayment of the loan from the client CL with the proceeds from the sale of the land L. The financier FN is usually a financial company.

[0019] The server 50 is owned by the contractor AG, but it can also be owned by the insurer IN or the financier FN. It is connected to the client CL, the insurer IN, and the financier FN via communication lines, and can send and receive various notifications. Specifically, it sends information to the insurer IN using a transmission signal SIN and receives information using a reception signal RIN. It also sends information to the financier FN and the client CL using transmission signals SFN and SCL, respectively, and receives information using reception signals RFN and RCL.

[0020] The insurer IN, financier FN, and client CL each possess terminals capable of sending and receiving these transmission and reception signals. The soil remediation work management system 1 transmits information regarding the contents and results of the investigation work, the contents and results of the remediation work, the original estimated total amount EΣ, and any deviations from the original estimated total amount EΣ as the work progresses to the insurer IN, financier FN, and client CL. Hereinafter, the client CL, insurer IN, and financier FN will be collectively referred to as "each member."

[0021] Figure 2 shows the general process of soil remediation work. Details will be explained in the flow chart below, but soil remediation work begins with a construction contract being concluded between at least the client CL and the contractor AG, with an agreement on costs (contract process). Note that the contract may also be a two-, three-, or four-party contract between the client CL, the contractor AG, the insurer IN, and the financier FN. The work is divided into an investigation process, which includes investigation work, and a construction process, which includes remediation work. The contamination status of land L is investigated in advance, and then the actual remediation work is carried out. Once the construction process is completed, the soil on land L is remediated.

[0022] The land L is then sold. During this time, the financier FN lends the construction costs to the client CL, and the insurer IN receives the premiums, and if the final amount is higher than the initial estimated total ES, the insurer compensates for the difference (P21). The survey and construction processes can be divided into several stages. Then, settlement takes place in the settlement process (P22). The financier FN receives repayment of the loan from the proceeds of the sale of the land (P23).

[0023] 3 shows a configuration diagram of a management system 1 according to the present invention. The management system 1 is built on a server 50. In terms of hardware, it is composed of a CPU (Central Processing Unit) 10 and memory 12, and although it operates almost entirely as software, it can be considered to be composed of "units" that perform apparent processing.

[0024] In other words, the management system 1 is composed of a contract management unit 20, an investigation management unit 22, a construction management unit 24, and a settlement management unit 26, which can be considered to perform the processes of the contract management process, investigation management process, construction management process, and settlement management process, respectively. In addition, the investigation management unit 22 and the construction management unit 24 are provided with an insurance management unit 30.

[0025] The management system 1 also has a receiving end 52 that receives communications from the client CL, the insurer IN, and the financier FN, a transmitting end 54 that transmits communications to the client CL, the insurer IN, and the financier FN, and an insurance transmitting end 56 that sends insurance notifications when insurance coverage is possible.

[0026] <Main flow step 100> Figure 4 shows the main flow of the management system 1. An outline of the processing flow will be explained below. Note that the actual flow of soil remediation work is shown in Figure 2, so the explanation will also refer to Figure 2.

[0027] The management system 1 is started when a request application (P1) is made by the client CL as shown in Figure 2. When the management system 1 is started (step S100), a contract management process (step S102) is carried out. In the contract management process (step S102), after receiving a request from the client CL, the contractor AG and the insurer IN create an "initial estimate total amount ES" and reach an agreement on a soil remediation work contract with the client CL. The management system 1 determines that an agreement has been reached when the contractor AG inputs the agreement, or when the intention of the contracting parties to consent is input to the management system 1 via a line.

[0028] If the construction request contract is not agreed upon (N branch in step S104), the management system 1 stops (step S112). The management system 1 determines that the contract has not been concluded if either of the contracting parties inputs their intention to disagree.

[0029] Once an agreement is reached (Y branch in step S104), the investigation process begins, and the investigation management process (step S106) is carried out. In the investigation process, investigation work for soil remediation is carried out. In addition to the investigation work, other tasks such as reporting, billing, and payment are also carried out. The investigation work investigates the degree of contamination of the soil on the land, and obtains information to determine how the actual remediation work will be carried out.

[0030] The survey management process (step S106) of the management system 1 mainly manages the difference between the initial estimated survey cost EvSk and the actual survey cost RSk, changes in the initial estimated construction cost EvCk for the construction process (revised estimated construction cost ECk), and changes in the initial estimated total cost EΣ due to the progress of the survey work.

[0031] Survey work is usually carried out in multiple stages, such as investigating the surface and deeper parts of the land. For example, this may involve partially digging up the surface of the land or boring. In other words, survey work is often carried out in multiple stages. Therefore, the survey management process (step S106) may be carried out for each of the multiple stages of survey work.

[0032] Therefore, whether or not the inspection process has been completed is determined in the management system 1. The management system 1 knows that the inspection process has been completed by the end or repeat command input by the builder AG.

[0033] If the investigation process is not completed, the investigation process is repeated, and the investigation management process (step S106) is also repeated. Furthermore, the investigation contents are input into the soil remediation work management system 1 at each stage of the investigation work and reported to each member.

[0034] When the investigation process is completed and the investigation management process (step S106) is completed, the process moves to the next step. Note that the stages of the investigation work may be not only the division of the work but also the division of time. For example, each member may be reported every week.

[0035] As the construction process begins, the management system 1 starts the construction management process (step S108). The construction process is the process of actually carrying out the soil remediation work. In addition to the remediation work, other tasks such as reporting, billing, and payment may also be carried out. The construction management process (step S108) of the management system 1 mainly manages the difference between the revised estimated construction cost ECk and the actual construction cost RCk according to the progress of the remediation work, and the resulting change in the original estimated total amount ES.

[0036] The construction process may also involve multiple stages of purification work. In the construction management process (step S108) of the management system 1, results are entered at each stage of the purification work or at regular intervals and reported to each member. Therefore, the management system 1 determines whether the construction process has ended. The management system 1 is aware of the end of the construction process when the contractor AG completes the construction process or inputs a repeat command.

[0037] If the construction process is not completed, the purification work is repeated, and therefore the construction management process (step S108) is also repeated. If the construction process is completed, the management system 1 also terminates the construction management process (step S108) and moves the process to the next settlement management process (step S110).

[0038] In the settlement management process (step S110), the final cost (estimated implementation amount XE) is compared with the initial total estimate EΣ, and the lower of the two is notified to the client CL as an invoice. The process then ends (step S112). The estimated implementation amount XE is initialized at the beginning of the investigation management process (step S106) and refers to the amount obtained by accumulating the actual costs incurred thereafter.

[0039] As actual construction work, such as the investigation work in the investigation phase and the purification work in the construction phase, progresses, it is possible that the estimated total cost of construction CEΣ will exceed the initial estimated total cost ES, requiring the application of insurance. Therefore, the management system 1 is provided with an insurance notification process (step S184 (Fig. 11) and step S224 (Fig. 15) described below) that notifies each member, including the insurer IN, of this. The estimated total cost of construction CEΣ refers to the amount obtained by correcting the initial estimated total cost ESΣ by, for example, replacing estimated costs with actual costs as the actual construction work progresses. The estimated total cost of construction CEΣ will ultimately be the same as the estimated total cost of construction XE.

[0040] In addition, in the investigation management process (step S106) and the construction management process (step S108), the difference between the estimated total implementation amount CEΣ and the original estimated total amount ESΣ is calculated and notified to each member. In addition, the contract management process (step S102) and contract establishment (step S104) are performed by the contract management unit 20 in Figure 3, the investigation management process (step S106) is performed by the investigation management unit 22, the construction management process (step S108) is performed by the construction management unit 24, the settlement management process (step S110) is performed by the settlement management unit 26, and the insurance notification process is performed by the insurance management unit 30. Each step in the flow in Figure 4 will be explained in detail below.

[0041] <Contract management process step S102> Figure 5 shows the processing flow of the contract management process. When control is transferred to the contract management process (step S102), the contractor's estimate Ect is input (step S120), and the insurer's estimate Ein is input (step S122). The contractor AG estimates the cost of soil remediation work for the target land L (the contractor's estimate Ect) from the client CL based on the contractor database AGDB (see Figure 1), which is an accumulation of the contractor AG's past construction experience. In other words, the contractor's estimate Ect is an estimate prepared by the contractor AG.

[0042] The insurer IN also estimates the cost of soil remediation work (insurer estimate Ein) for the target land L from the client CL based on the insurer database INDB (see Figure 1), which is an accumulation of past insurance contract experience. In other words, the insurer estimate Ein is an estimate created by the insurer IN. The contractor estimate Ect is input into the management system 1 by the contractor AG. The insurer estimate Ein is input into the management system 1 by the insurer IN via the received signal RIN. Note that it is not excluded for the contractor AG to input the insurer estimate Ein into the management system 1.

[0043] The contractor database AGDB held by the contractor AG is primarily based on the contractor AG's past construction experience. Other information, such as the geological history of the land L for which soil remediation is requested, is also used as reference.

[0044] On the other hand, the insurer database INDB held by insurer IN is mainly based on the insurer IN's past compensation experience. It goes without saying that insurer IN also checks the geographical history of land L that is the subject of soil remediation.

[0045] The contractor AG wants to estimate the cost of soil remediation work for the client CL as low as possible while still making a profit. This is because there is price competition among contractors. On the other hand, the insurer IN will compensate for the difference if the final total construction cost is higher than the estimate, so a higher estimate is preferable. Therefore, it is necessary to calculate an estimate that both the contractor AG and the insurer IN can agree on.

[0046] In the calculation of the initial total estimate (step S124), the initial total estimate EΣ is calculated from the builder estimate Ect and the insurer estimate Ein. The calculation of the initial total estimate EΣ is not particularly limited as long as it is a calculation method that can be agreed upon by the builder AG and the insurer IN. For example, a calculation method such as the formula (1) can be preferably used.

[0047]

number

[0048] ES is the total initial estimate, Ect is the contractor's estimate, and Ein is the insurer's estimate. The coefficients a and b may be determined in advance between the contractor AG and the insurer IN, or they may be determined through discussion between the contractor AG and the insurer IN for this project only.

[0049] Next, it is determined whether the contractor AG and the insurer IN agree on the total initial estimate EΣ calculated by equation (1) (step S126). If the contractors cannot agree (N branch in step S126), the process returns to inputting the contractor estimate (step S120). If the contractors agree (Y branch in step S126), the construction schedule is determined (step S128).

[0050] The initial total estimate EΣ is composed of the sum of the initial estimated investigation cost EvSk and the initial estimated construction cost EvCk (see equation (2)). It is composed in this way because the procedure involves conducting investigation work in areas where remediation work is required, deciding on the method of remediation work, and then calculating the estimated amount. In other words, the initial estimated construction cost EvCk, which is the estimate for the kth construction, is determined based on the results of the kth investigation.

[0051] The initial estimated investigation costs EvSk are the estimated costs for each stage of the investigation process prepared before soil remediation work begins. The initial estimated construction costs EvCk are the estimated costs for each stage of the construction process prepared before soil remediation work begins.

[0052]

number

[0053] Therefore, when the contractors agree on the initial total estimate EΣ, the initial estimated survey costs EvSk and the initial estimated construction costs EvCk are also agreed upon, and as a result, the construction schedule for the survey schedule and construction schedule is decided. The schedule determination (step S128) can also be said to be decided once the initial total estimate EΣ is agreed upon.

[0054] In addition, if the investigation and construction are divided into multiple stages, the "k" in the initial investigation cost estimate EvSk and the initial construction cost estimate EvCk is an index for each stage. For example, it is expressed as the initial investigation cost estimate EvS1 for the first stage. Equation (2) means adding up the i-th initial investigation cost estimate EvSi and the i-th initial construction cost estimate EvCi, and then summing them from i 1 to i k. In this specification, a specific number or variable "i" is used in the processing steps, and the variable "k" is used for general explanations.

[0055] Next, the initial total estimate EΣ is presented to the client CL (step S130). The presentation is made from the management system 1 to the client CL via a communication line. However, the presentation may also be made by actually creating an estimate, presenting it to the client CL, and entering that fact into the management system 1. Thereafter, the process returns to the main routine (step S132).

[0056] Referring again to the main routine in Figure 4, in the contract management process (step S102), when the initial total estimate EΣ is calculated (P2 in Figure 2) and the initial total estimate EΣ is presented to the client CL (P3 in Figure 2), a decision is made as to whether the client CL agrees with the presented initial total estimate EΣ (step S104). As already explained, the management system 1 knows whether there is agreement or not through input from the contractor AG, etc.

[0057] In step S104, if the client CL is satisfied with the initial estimated total amount EΣ presented by the contractor AG and the insurer IN, a contract for soil remediation work is concluded. In actual construction, the agreement of not only the client CL but also the financier FN, who will lend the initial estimated total amount EΣ, is required, but the management system 1 can simply input that agreement has been obtained from the client CL.

[0058] Referring to Figure 2, in the actual contract formation, the client CL enters into a construction contract with the contractor AG, enters into a loan contract with the financier FN, concludes an insurance contract with the insurer IN (P4), and pays the insurance premium to the insurer IN (P5). Although the insurance premium will not be mentioned hereafter, it will be paid at the time in accordance with the insurance contract.

[0059] Referring again to the main routine in Figure 4, if the contract is not concluded (N branch in step S104), the management system 1 itself stops (step S112). The soil remediation work management system 1 waits for the next request (P1 in Figure 2) to be input from the client CL.

[0060] <Investigation management process step S106> After the contract is signed, the contractor AG will carry out investigation work (P6 in Figure 2). The investigation work is a field survey of the land L where soil remediation will be carried out. Investigation work is usually carried out in multiple stages, including a surface investigation, an individual investigation in which the surface area where contamination was detected is investigated in even smaller sections, and a deep investigation in which the areas where contamination was detected in the individual investigation are investigated more deeply. At each stage of the investigation work, processing is carried out by the investigation management process (step S106).

[0061] The investigation process will be further explained with reference to Figure 2. Once the investigation work has actually been carried out at a predetermined stage (P6), an investigation report is entered into the management system 1 and sent to each member (P7). Then, a cost-related notification is issued for the investigation work that has been carried out (P8). The cost-related notification includes the cost of the investigation carried out (actual investigation cost RSk), as well as the revised estimated construction cost ECk, which is an estimate of the construction that will be revised as a result of the investigation work, and the estimated total construction cost CEΣ, which will be revised from the original estimated total ESΣ.

[0062] Figure 6 shows the relationship between the initial total estimate EΣ and the estimated total implementation cost CEΣ. The initial total estimate EΣ is composed of the initial estimated investigation cost EvSk and the initial estimated construction cost EvCk, as shown in equation (2). In the following explanation, we will assume that the investigation and remediation work will be carried out in three stages: surface investigation of land L, individual investigation, and deep investigation. These investigation works will be referred to as PS1, PS2, and PS3, respectively. Furthermore, the corresponding remediation work will be referred to as PC1, PC2, and PC3.

[0063] Since the investigation and purification work will be carried out in three stages, the initial investigation cost estimate will consist of three stages: EvS1, EvS2, and EvS3, and the initial construction cost estimate will consist of three stages: EvC1, EvC2, and EvC3. This can be written explicitly as equation (3) (see Figure 6).

[0064] When the first survey work PS1 is carried out, the actual survey cost RS1, which is the actual cost of the survey work, is determined. In other words, the initial estimated survey cost EvS1 is replaced by the actual survey cost RS1, which is the cost of survey work PS1. The same applies to survey work PS2 and survey work PS3 (see Figure 6: equation (4)).

[0065] Furthermore, the investigation work PS1 will also reveal the actual situation of the remediation work PC1, and the cost of the remediation work PC1 will be revised depending on whether it is as originally expected or not. In other words, the original estimated construction cost EvC1 will be revised to the revised estimated construction cost EC1 (see Figure 6: (5)). As a result, the original estimated total amount EΣ will be revised to the expected total implementation amount CEΣ (see Figure 6: (6)).

[0066] Figure 7 shows this relationship in a graph. Referring to Figure 7, in both Figure 7(a) and Figure 7(b), the horizontal axis represents each stage of the investigation work and remediation work, and the vertical axis represents the amount. Figure 7(a) shows the initial estimated total amount EΣ. Initial estimated investigation costs EvS1 to EvS3 and initial estimated construction costs EvC1 to EvC3 have been estimated for investigation work PS1 to investigation work PS3 and remediation work PC1 to remediation work PC3. These total amounts are shown as lines, and the cumulative total is represented by the initial estimated total amount EΣ. Note that the vertical axis of the initial estimated total amount EΣ is on a different scale from the amount of each investigation work and each remediation work. The same is true for Figure 7(b).

[0067] Figure 7(b) shows the state after investigation works PS1 to PS3 have been carried out. Investigation works PS1 to PS3 replace the initial estimated investigation costs EvS1 to EvS3 with actual investigation costs RS1 to RS3. In addition, investigation works PS1 to PS3 have revised the estimates for purification works PC1 to PC3 to revised estimated construction costs EC1 to EC3, which are more detailed than the initial estimates.

[0068] The difference between the initial estimated survey cost EvSk and the actual survey cost RSk is referred to as the survey difference ΔSk. Furthermore, the difference between the initial estimated construction cost EvCk and the revised estimated construction cost ECk is referred to as the revised estimate construction difference ΔECk. Figure 7(b) shows the survey difference ΔS2 and the revised estimate construction difference ΔEC2 for the survey work PS2 and the purification work PC2.

[0069] By comparing the estimated total implementation cost CEΣ with the initial total estimate ES, the client CL can check as the construction progresses whether the costs of soil remediation will be within the initial total estimate ESΣ or whether costs beyond the initial total estimate ESΣ will be required.

[0070] Referring back to Figure 2, if the estimated total cost CEΣ exceeds the original estimated total cost ESΣ, an insurance notice (P9) is sent. This is an important notice, especially for the insurer IN, as they must start preparing for insurance coverage. The investigation report (P7), cost-related notice (P8) and insurance notice (P9) are processed by the management system 1.

[0071] In the practical aspects of the investigation process, the financier FN lends the payment to the client CL in response to the invoice for the investigation work PSk that the contractor AG has made to the client CL (P10), and the client CL pays the contractor AG (P11). The exchange of information regarding this may also be included in the management system 1.

[0072] 8 shows the processing flow of the investigation management process (step S106). When the investigation management process (step S106) starts, initial setting is performed, including a process of setting the estimated total cost CEΣ to the initial estimated total cost ESΣ (step S140).

[0073] Figure 9 shows the contents of the initial setting (step S140). The initial setting includes a process of setting the estimated total implementation amount CEΣ to the original estimated total amount ES, as well as a process of initializing (setting the values ​​to zero) the estimated balance ER, the estimated implementation amount XE, and the estimated construction amount ΣC (step S160). Once these initial settings are complete, the process returns to the survey management process (step S140) (step S162).

[0074] Referring again to Figure 8, during the initial setup (step S140), survey work is carried out at the site (P6 in Figure 2), and a survey report (P7 in Figure 2) is created. This survey report is entered into the management system 1, which then notifies each member of the team (step S142). Next, the actual survey cost RSi for the survey work PSi is calculated (step S144). This is calculated by having the contractor AG enter all the costs incurred in the survey work PSi into the management system 1 and adding them up.

[0075] Next, the initial estimated survey costs EvSi and the actual survey costs RSi are swapped for the estimated total implementation amount CEΣ (step S146). This is done by subtracting the initial estimated survey costs EvSi from the estimated total implementation amount CEΣ and adding the actual survey costs RSi. The construction costs revised by this survey work PSi are also swapped (step S148). Specifically, the initial estimated construction costs EvCi are subtracted from the estimated total implementation amount CEΣ and the revised estimated construction costs ECi are added. Other amounts are then calculated.

[0076] Although the investigation work PSi is assumed to revise the remediation work PCi here, revisions may also be made to remediation work other than the remediation work PCi. For example, the implementation of investigation work PS2 may require budget revisions for remediation works PC2 and PC3.

[0077] The remediation works PCi are multiple consecutive works that are completed sequentially from the surface layer to the deeper layers. In other words, the remediation works PCi in the deeper layers cannot be carried out until the remediation works PCi in the shallower layers are completed. The investigation works PSi are set for each corresponding remediation work PCi, but budget adjustments may also affect the remediation works PCi that are carried out after the remediation works PCi corresponding to the investigation works PSi. The management system 1 also makes such budget adjustments possible.

[0078] Next, other calculations (step S150) are performed. Figure 10 shows the flow of the process for calculating other (costs) (step S150). Specific processes include calculating the survey difference ΔSi, which is the difference between the original estimated survey cost EvSi and the actual survey cost RSi, and the revised estimated construction difference ΔECi, which is the difference between the original estimated construction cost EvSi and the revised estimated construction cost ECi, for the surveyed work PSi (step S170), updating the estimated balance ER (step S172), and updating the estimated implementation amount XE (step S174).

[0079] The estimated balance ER is the sum of the survey difference ΔSi and the revised estimated construction difference ΔECi, etc., and is the amount that will remain in the hands of the client CL if the current estimated amount is carried out as is.

[0080] The client CL plans to spend the total amount of the initial estimate ES. However, if the actual construction costs are lower than the total amount of the initial estimate ES, the client CL will keep the difference. Therefore, for the client CL, looking at the trend in the estimated balance ER can be useful information for managing the funds for the new project. Also, for the insurer IN, if the estimated balance ER becomes negative, insurance payments will be required, so the trend can be useful information for the insurance business. In other words, presenting the estimated balance ER to each member at each stage of the investigation work and purification work can be useful information for each member.

[0081] The estimated implementation cost XE is the sum of the actual costs incurred for each stage of the investigation work and the purification work. After these calculations are completed, the process returns to the investigation management step (step S150) routine (step S176).

[0082] Referring again to Figure 8, once the other calculations (step S150) are completed, the process moves to cost-related notification (step S152).

[0083] 11 shows the flow of processing for the expense-related notification (step S152). When the expense-related notification processing (step S152) begins, each member is notified of the estimated total implementation amount CEΣ calculated in steps S148 and S150, the actual investigation costs RSi incurred for the investigated work PSi, the estimated balance ER, and the accumulated implementation amount XE (step S180). The actual investigation costs RSi incurred for the investigated work PSi can also include an invoice for these costs.

[0084] Next, the estimated total cost CEΣ is compared with the original estimated total cost EEΣ (step S182). If the original estimated total cost EEΣ is greater than the estimated total cost CEΣ (branch N in step S182), the process returns to the routine for the investigation management step (step S152) (step S186).

[0085] On the other hand, if the initial estimated total amount EΣ is smaller than the expected total implementation amount CEΣ (Y branch in step S182), this means that construction costs exceeding the initial estimated total amount EΣ will be required, so insurance notification is made (step S184). The insurance notification is always notified to the insurer IN. Then, the process returns to the investigation management process routine (step S152) (step S186). The insurance notification process (step S184) corresponds to the insurance management unit 30 in Figure 3.

[0086] Referring again to FIG. 8, once the cost-related notification (step S152) is completed, it is confirmed whether the survey process has been completed (step S154). In this case, it is determined whether surveyed work PS1, surveyed work PS2, and surveyed work PS3 have been completed. If the surveyed work has not been completed (N branch in step S154), the process moves on to the next surveyed work. In this case, the subscript "i" is incremented. The management system 1 waits in the survey report (step S142) until the next survey result is available and information that can be reported is entered. If the survey has been completed (Y branch in step S154), the process returns to the main routine (step S156).

[0087] <Construction management process step S108> Once the investigation process is complete, the contractor AG will carry out the actual remediation work for soil purification. The construction process will be explained with reference to Figure 2. Once the investigation process is complete, the construction process (remediation work) will be carried out (P12). Once the remediation work is complete, a construction report will be made (P13). Here, the details of the remediation work and the extent to which the soil has been remediated as a result of the remediation work will be reported.

[0088] Next, a cost-related notification is sent (P14). Here, the revised estimated construction cost ECk is replaced with the actual construction cost RCk, and the estimated total cost CEΣ is updated. This is then compared with the original estimated total cost ESΣ, and if the estimated total cost CEΣ is higher than the original estimated total cost ESΣ, an insurance notification is sent (P15).

[0089] The estimated total implementation cost CEΣ approaches the estimated implementation cost XE by replacing it with the actual survey cost RSk and the implementation cost RCk. When all the purification work PCk is completed, the estimated total implementation cost CEΣ will be the same as the estimated implementation cost XE.

[0090] If the cost-related notice includes an invoice for the remediation work carried out, the financier FN will pay the loan to the client CL (P16), and the client CL will pay the construction costs RCk to the contractor AG (P17).

[0091] Figure 12(b) shows the situation when the revised estimated construction cost ECk is replaced with the actual construction cost RCk. Figure 12(a) is a reprint of Figure 7(b). In both Figures 12(a) and 12(b), the horizontal axis shows each stage of the investigation work and purification work, and the vertical axis shows the cost amount. Note that the broken line shows the estimated implementation amount XE, and the costs of the investigation work and purification work stages are reduced on the vertical axis. Figure 12(b) shows the state at the time purification work PC1 to purification work PC3 are completed.

[0092] Furthermore, the "EΣ" arrow shown in Figure 12(a) represents the initial estimated total amount (see Figure 7(a)), and the "CEΣh" arrow represents the estimated total implementation amount CEΣ at the time the investigation is completed. In Figure 12(b), the "EΣ" and "CEΣh" arrows have the same meaning as in Figure 12(a). In Figure 12(b), "CEΣf" represents the estimated total implementation amount CEΣ when construction PCi is completed to the end (in this case, purification work PC3 is completed). As explained above, the estimated total implementation amount CEΣf is the same as the estimated implementation amount XE.

[0093] When the cleanup work is completed, the revised estimated construction cost ECk is replaced by the actual construction cost RCk. In this example, when the investigation work PSk was completed, it was assumed that the cost of the cleanup work would be higher than originally planned, so the estimated total construction cost CEΣ was higher than the original estimated total cost ESΣ (Figure 12(a)). When this fact is discovered, an insurance notice is sent (step S184 in Figure 11).

[0094] However, when construction actually began, the soil was found to be less contaminated than expected at the investigation stage, and the remediation work was only minor, resulting in the actual construction cost RCi being less than the revised estimated construction cost ECi in Figure 12(a), as shown in Figure 12(b). Specifically, the revised estimated construction cost EC1 and the actual construction cost RC1 were the same, but the actual construction costs RC2 and RC3 were lower than the revised estimated construction costs EC2 and EC3.

[0095] As a result, although the insurer IN prepared the insurance money when the survey work PSk was completed, ultimately no insurance money was paid. In addition, the client CL will be left with the difference between the original estimated total amount ES and the estimated implementation amount XE (= the estimated implementation total CEΣ) (which is the same as the estimated balance ER).

[0096] 13 shows the processing flow of the construction management process (step S108) in the construction process described above by the management system 1. Once the processing of the construction management process (step S108) has started, a construction report is made after the completion of the purification work at the implementation stage (step S190: P13 in FIG. 2).

[0097] Note that the variables that were initialized in the initial setting (step S140) of the investigation management process (step S104: Figure 8) are not initialized. The cost-related variables for investigation work and purification work are variables to be accumulated, so if they are initialized at the beginning of the investigation management process (step S106), there is no need to initialize them in subsequent processes.

[0098] Next, each cost is calculated. First, the construction cost RCi for the purification work PCi is calculated (step S192). This is calculated by the contractor AG inputting the costs incurred in the purification work PCi and adding them up. Next, the estimated total construction cost CEΣ is updated by replacing the revised estimated construction cost ECi with the actual construction cost RCi (step S194). Specifically, the revised estimated construction cost ECi is subtracted from the estimated total construction cost CEΣ and the actual construction cost RCi is added.

[0099] Then, calculations are also made for other variables (step S196). Figure 14 shows the process of other calculations (step S198). The actual construction cost RCi is added to the estimated construction cost ΣC and updated (step S210). The estimated construction cost ΣC is a variable that calculates the total of the actual construction costs RCi for the purification work PCi. If payment for construction costs is made at each construction stage, as shown on page 17 of Figure 2, there is no need to use the estimated construction cost ΣC. The estimated construction cost ΣC is used when the actual construction costs are billed collectively in the settlement process.

[0100] Next, the construction difference ΔCi, which is the difference between the revised estimated construction cost ECi and the actual construction cost RCi, is calculated (step S212). Then, the construction difference ΔCi is added to the estimated balance ER (step S214). The construction difference ΔCi is a positive value when the revised estimated construction cost ECi is greater than the actual construction cost RCi, and is a negative value when the revised estimated construction cost ECi is less than the actual construction cost RCi. As a result of adding the construction difference ΔCi, the estimated balance ER is revised and indicates the difference from the original estimated total amount ES. If the estimated balance ER is positive, the client CL will have some money left in their hands, and if it is negative, the client CL will have no money left in their hands. If the estimated balance ER ultimately becomes negative, an insurance claim will be paid. The construction difference ΔCi is generally called the construction difference ΔCk.

[0101] Next, the actual construction cost RCi is added to the estimated construction cost XE (step S216). In the construction management process (step S108), the estimated construction cost XE is the sum of the actual survey cost RSi and the actual construction cost RCi. Then, when all construction is completed and the final actual construction cost RCi is added, it becomes the same as the estimated total construction cost CEΣ. This is because the revised estimated construction cost ECi was replaced with the actual construction cost RCi in step S194 of Figure 13. Then, the process returns to the construction management process (step S196) (step S218).

[0102] Referring again to Figure 13, when the process returns from other calculations (step S196), cost-related notification (step S198) is carried out next. Figure 15 shows the flow of the cost-related notification (step S198) process. When cost-related notification (step S198) starts, the estimated total implementation amount CEΣ, the implementation cost RCi for the purification work PCi at this stage, the estimated balance ER, and the accumulated implementation amount XE are reported to each member (step S220).

[0103] Next, the estimated total implementation amount CEΣ is compared with the initial estimated total amount ES (step S222). If the estimated total implementation amount CEΣ is greater than the initial estimated total amount ES (Y branch in step S222), an insurance notice is issued (step S224). This is because there is a possibility that the accumulated implementation amount XE will exceed the initial estimated total amount ES.

[0104] If the estimated total cost CEΣ is not greater than the initial estimated total cost ESΣ (N branch in step S222), the insurance notification (step S224) is not performed, and the process returns to the construction management process (step S226). The insurance notification (step S224) corresponds to the processing of the insurance management unit 30 in FIG. 3.

[0105] <Payment Management Process Step S110> Referring back to Figure 2, in the settlement process, first a report of the completion of work is made (P18). Then a final cost notification is made (P19). If payment has been made for each investigation work PSk and cleanup work PCk, the final cost notification will only report the amount. After that, any unpaid costs are settled (P20-P22).

[0106] Referring again to Figure 4, in the above settlement process, the management system 1 shifts processing from the construction management process (step S108) to the settlement management process (step S110). Figure 16 shows the processing flow of the settlement management process (step S110). When processing shifts to the settlement management process (step S110), a construction completion report is made (step S250). Next, the final billing amount TR is calculated as shown in equation (7) (step S252). The final billing amount TR is determined by selecting the smaller of the estimated implementation amount XE and the original total estimated amount ES.

[0107]

number

[0108] Here, MIN() is a function that selects and outputs the smaller of the two values ​​in parentheses. In this way, the soil remediation work management system 1 according to the present invention bills the client CL for the estimated implementation amount XE if the estimated implementation amount XE is lower than the original total estimate EΣ, and bills only the original total estimate EΣ if the estimated implementation amount XE is greater than the original total estimate EΣ. In other words, the client CL will not incur expenses that exceed the original total estimate EΣ.

[0109] Next, the insurance compensation amount TIN is calculated (step S254). The insurance compensation amount TIN is the value obtained by subtracting the initial estimated total amount EΣ from the estimated implementation amount XE. Therefore, if the estimated implementation amount XE is lower than the initial estimated total amount EΣ, the insurance compensation amount TIN will be a negative value, and if the estimated implementation amount XE is higher than the initial estimated total amount EΣ, the insurance compensation amount TIN will be a positive value. If the insurance compensation amount TIN is a negative value, the client CL will have funds remaining on hand. If the insurance compensation amount TIN is a positive value, the client CL will have paid the full amount of the initial estimated total amount EΣ that was prepared before the start of construction work, and the insurance compensation amount TIN will be compensated by the insurer IN.

[0110] Next, the estimated implementation cost XE, the total initial estimate EΣ, the final billing amount TR, and the insurance compensation amount TIN are notified to each member (step S256). This corresponds to the final cost notification (P19) in Figure 2. Note that if construction costs are received for each construction stage in the construction process, only the amount is notified. If the costs incurred in the construction process are billed collectively in the settlement management process, the estimated construction cost ΣC is included in step S256. Once the reporting in step S256 is complete, the process returns to the main routine in Figure 4 (step S258).

[0111] Referring again to Figure 4, when the processing of the settlement management step (step S110) is completed, the soil remediation work management system 1 is terminated (step S112).

[0112] Refer back to Figure 2. After that, for the soil remediation work, if the final cost notice P19 from the contractor AG includes an invoice to be paid by the client CL, the financier FN will lend the funds to the client CL (P20). Also, if there is an insurance payment, the insurer IN will pay the insurance money to the client CL (P21). Then, the client CL will make the final payment to the contractor AG (P22). This concludes the contract for the soil remediation work between the client CL and the contractor AG.

[0113] After that, the client CL sells the land L after soil purification and uses the profits to repay the loan to the financier FN (P23).

[0114] As described above, the soil remediation work management system 1 of the present invention can provide useful information to each of the four parties, the client CL, the contractor AG, the financier FN, and the insurer IN, by informing them of fluctuations in the estimated implementation amount XE from the initial total estimated amount EΣ according to the progress of the investigation work PSk and the remediation work PCk. [Industrial Applicability]

[0115] The soil remediation work management system according to the present invention can be suitably used in the construction of buildings, facilities, etc. by replacing soil remediation work on land with the construction of buildings, facilities, etc. [Explanation of symbols]

[0116] 1. Soil remediation construction management system (management system) 10 CPU 12 Memory 20 Contract Management Department 22 Research Management Department 24 Construction Management Department 26 Payment Management Department 30 Insurance Management Department 50 servers 52 Receiving end 54 Transmitting end 56 Insurance sending end CL Client L land AG Contractor IN Insurer EΣ Initial estimated total amount FN Financier SIN Transmit signal RIN Received signal SFN, SCL transmission signal RFN, RCL received signal EvSk Initial estimated survey costs RSk Actual survey costs EvCk Initial construction cost estimate ECk revised estimated construction cost RCk Construction cost XE Accumulated Amount CEΣ Estimated total cost Ect builder estimate Ein Insurer Quote AGDB Constructor Database INDB Insurer Database ΔSk Survey difference ΔECk Revised estimate construction difference ER expected balance ΣC Estimated construction cost ΔCi construction difference ΔCk Construction difference TR Final billing amount TIN Insurance Coverage

Claims

1. A soil remediation work management system is provided in which a client CL, who has an insurer IN that compensates for the maximum amount of soil remediation work consisting of an investigation process in which investigation work PSk is performed on land L before soil remediation and a construction process in which remediation work PCk is performed, and a financier FN that lends the cost of the soil remediation work, manages the soil remediation work that the client CL requests from a contractor AG, a contract management unit that calculates an initial estimated total amount ES consisting of an initial estimated survey cost EvSk and an initial estimated construction cost EvCk from a contractor estimate Ect calculated based on the contractor database AGDB held by the contractor AG and an insurer estimate Ein calculated based on the insurer database INDB held by the insurer IN, and confirms the contract for the construction work with the client CL; The initial estimated survey cost EvSk in the initial estimated total cost EΣ is replaced with the actual survey cost RSk of the survey work PSk to calculate the estimated total cost CEΣ. Based on the results of the survey work PSk, the initial estimated construction cost EvCk in the estimated total construction cost CEΣ is replaced with the revised estimated construction cost ECk to update the estimated total construction cost CEΣ, The actual investigation cost RSk is added to the estimated amount XE, An investigation management department that reports the investigation process and notifies the client CL of at least the estimated total cost CES; The estimated total construction cost CEΣ is updated by replacing the revised estimated construction cost ECk in the estimated total construction cost CEΣ with the actual construction cost RCk, The actual construction cost RCk is added to the estimated construction cost XE, A construction management department that reports the construction process and notifies the client CL of at least the estimated total construction cost CES; an insurance management unit that notifies at least the insurer IN when the estimated total construction cost CEΣ in the investigation management unit and the construction management unit becomes larger than the initial estimated total cost ES; A soil remediation work management system characterized by having a settlement management unit that notifies the client CL of the smaller of the initial estimated total amount EΣ and the accumulated implementation amount XE, which becomes equal to the estimated implementation total amount CEΣ, as the final billing amount TR.

2. The investigation management department The difference between the initial estimated research cost EvSk and the actual research cost RSk, that is, the research difference ΔSk, is added to the estimated balance ER. Notify the client CL of the survey difference ΔSk, The construction management department The construction difference ΔCk, which is the difference between the revised estimated construction cost ECk and the actual construction cost RCk, is added to the estimated balance ER, The soil remediation construction management system according to claim 1, wherein the construction difference ΔCk is notified to the client CL.

3. The contract management department calculates the initial estimated total amount EΣ as follows: The contractor estimate Ect; The insurer estimate Ein; 2. The soil remediation work management system according to claim 1, wherein the calculation is based on equation (1) using coefficients a and b determined between the contractor AG and the insurer IN. [Number 100] ES is the total initial estimate, Ect is the builder's estimate, and Ein is the insurer's estimate.

4. The construction process includes a plurality of purification works that are completed sequentially, The investigation step includes investigation works corresponding to the plurality of purification works, The implementation of the investigation work will change the cost of the cleanup work to be carried out after the corresponding cleanup work, 2. The soil remediation work management system according to claim 1, wherein the initial estimated construction cost EvCk of the construction process is revised to a revised estimated construction cost ECk.

5. 5. The soil remediation work management system according to claim 1, wherein the surveying process and the construction process are carried out in three stages: a surface layer, a middle layer, and a deep layer of the land L.

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