JP6166946B2 - Profitability determination method, profitability determination device, and profitability determination program - Google Patents

Description

  The present invention relates to a profitability determination method, a profitability determination apparatus, and a profitability determination program for determining the profitability of facility maintenance.

  Conventionally, the profitability of facility maintenance is judged and the abolition or survival of the facility is determined. At the time of this determination, for example, a system that calculates the cost of inspection, repair, repair, etc. of the facility based on the degree of deterioration of the facility to be maintained is used (see, for example, Patent Document 1). Specifically, a decision has been made to calculate the cost of renovation of the facility by this system and to abolish the facility whose cost exceeds the budget.

Japanese Patent Application Laid-Open No. 2002-297811

  However, in the above method, the abolition or survival of the facility will be decided uniformly according to the amount of expenses required for the renovation of the facility, etc., so the constructed facility may be abolished with little use, There was a problem that the facility could not be used effectively.

  Therefore, the present invention has been made in view of these points, and an object thereof is to provide a profitability determination method, a profitability determination apparatus, and a profitability determination program that can effectively use existing facilities.

  The present inventors have found that by maintaining not only the hardware side of the facility but also the software side, as a result, the maintenance cost of the facility may be reduced.

  The function of the building that constitutes the facility deteriorates with the passage of time from the time of new construction, so that the facility may not be used continuously unless the facility is improved. In addition, since the purpose of use of the facility and the business content change with the changing times, it may be necessary to review the usage of the facility.

  As described above, the contents of maintenance necessary for the effective use of facilities are diverse, and in the maintenance of the facilities in the present invention, the interior, exterior, housing, equipment, external structure, etc. of the building are inspected and repaired. Maintenance of the hardware that changes the layout of equipment such as floor plans and shelves, desks, and chairs in the facility, and the maintenance of software that reviews staff assignments and operational procedures. In addition to repairs to remove the finish material and damage, repair equipment, replace equipment, repaint, etc. Also included are refurbishments aimed at restoring some or all of the building's functions to the level at the time of new construction or a level close to this, such as replacement of finishing materials.

  By implementing hardware maintenance, it becomes possible to implement software maintenance more effectively. Specifically, for example, the maintenance of the hardware will improve the working environment of the staff of the facility or shorten the traffic line of the staff, so review the details of the work performed at the facility and arrange the staff Can be changed and the number of staff can be changed. To change the number of employees, it is possible to reduce the number of employees engaged in work by reducing unnecessary work or subcontracting work, or replacing conventional staff with people with cheaper hourly units such as temporary staff or part-time workers included. As described above, since the labor cost can be reduced by changing the number of staff members, the labor cost that can be reduced can be used as funds for implementing the facility.

  In addition, by reviewing staff assignments and work procedures, reducing unnecessary work or subcontracting some work, reducing or consolidating the space required to carry out work, creating free space You can also. If the created empty space is leased to a company, the rent obtained through the lease can be used as funds for the construction of the facility.

  In this way, financial benefits are generated by improving the hardware aspects of the facility as well as the software aspects of the facility. Therefore, even if the cost required for the maintenance of the hardware exceeds the budget, the financial benefit can be added to this budget. In addition, in some cases, the costs for improving the hardware of the facility may be covered. As a result, an old facility may be maintained and operated effectively.

  The profitability determination method according to the first aspect of the present invention is a profitability determination method for determining the profitability of facility maintenance, and stores an estimated maintenance cost that is an estimated value of the maintenance cost required for the maintenance. A process (for example, S1 which will be described later) stored in a part (for example, a storage unit 13 which will be described later), and a current labor cost which is a personnel cost of a staff member who works at the facility before the maintenance is performed. Storing in the storage unit (for example, S3 described later), and storing the planned personnel cost that is the personnel cost of the staff working at the facility after performing the maintenance (for example, S3 described later); Subtracting the scheduled personnel cost from the current personnel cost to calculate a reduced personnel cost indicating a reduction in personnel cost (for example, S4 described later), based on the estimated maintenance cost and the reduced personnel cost To determine the profitability of the maintenance Degree (e.g., S5 will be described later) provided with a.

  Therefore, according to the present invention, in the calculating step, a reduction personnel cost indicating a reduction amount of the personnel cost is calculated by subtracting a future planned personnel cost from the current personnel cost stored in the storage unit. In the determining step, the profitability of the maintenance is determined based on the estimated maintenance cost of the facility and the reduction labor cost. Therefore, according to the present invention, the person who determines whether or not to improve the facility does not determine whether or not to perform the maintenance based only on the estimated maintenance cost of the facility, but considers the benefits generated by the maintenance of the facility. Then, based on the profitability of the facility maintenance, it can be determined whether or not the facility is to be maintained. As a result, existing facilities can be used effectively.

  In the profitability determination method described above, a time when an actual value database storing actual values of facility maintenance costs is constructed and a time when the profitability is determined before the step of storing the estimated maintenance costs in a storage unit And calculating a corrected actual value obtained by correcting the actual value stored in the actual value database, and calculating the estimated maintenance cost based on the corrected actual value.

  According to the present invention, it is possible to calculate a corrected actual value obtained by correcting the actual value stored in the actual value database built in advance, and to calculate the estimated maintenance cost based on the corrected actual value. Therefore, the estimated maintenance cost can be easily calculated based on the past maintenance results without calculating the maintenance cost at the time of judging profitability.

  In the profitability determination method, the step of storing the current labor cost in the storage unit is associated with a type to which a staff member working at the facility belongs before the maintenance is performed, and belongs to each of the types. The process of storing the current unit personnel cost, which is the average personnel cost of the staff, in the storage unit (for example, S21 described later), and the current number of staff working at the facility before the maintenance is performed The current labor cost is calculated by multiplying the current unit labor cost and the current working number for each type by a step (for example, S22 described later) for storing the number of working times in the storage unit for each type and the current unit labor cost for each type. And the step of storing the scheduled labor cost in the storage unit is related to the type to which the staff working at the facility belongs after the maintenance is performed. And storing the scheduled unit personnel cost that is the average personnel cost of the staff belonging to each of the types in the storage unit (for example, S31 described later), and the staff working at the facility after performing the maintenance Storing the scheduled number of workers, which is the number of scheduled workers, in the storage unit for each type (for example, S32 described later), and multiplying the scheduled unit personnel cost and the scheduled number of workers for each type And calculating a labor cost (for example, S33).

  According to the present invention, in the step of calculating, based on the current unit personnel cost, the current number of workers, the scheduled unit personnel cost and the scheduled number of workers stored in the storage unit, the current personnel cost and the planned personnel cost are calculated, By subtracting the planned labor cost from the current labor cost, a reduced labor cost indicating a reduction in the labor cost is calculated. In the determining step, the profitability of the maintenance is determined based on the estimated maintenance cost of the facility and the reduction labor cost. Therefore, according to the present invention, even if the judge who decides whether or not to improve the facility does not understand the current labor cost and the planned labor cost, the current unit labor cost, the current working number, the scheduled unit Profitability can be determined by taking into account labor costs and the planned number of workers.

  Moreover, according to this invention, profitability can be determined using the current unit labor cost and the scheduled unit labor cost associated with the type to which the staff working at the facility belongs. Therefore, in addition to the maintenance of the hardware aspect of the facility, in the case of carrying out a change of the staff and the change in the number of staff members by reviewing the details of the work performed at the facility in detail, a part of the conventional staff The profitability can be determined in consideration of the reduced labor cost, which is a labor cost that can be reduced by replacing with a person with a lower hourly unit price.

  The profitability determination method further includes a step of storing a determination period, which is a period for which the profitability is determined, in the storage unit, and in the step of determining the profitability, the estimated maintenance cost and a unit Based on the reduction labor cost within the period calculated by multiplying the reduction labor cost per period by the determination period, and the profit amount obtained within the determination period by the maintenance, the profitability of the maintenance is determined. When determining that the profitability is negative, it is necessary for the estimated maintenance cost to be less than the determination threshold value by subtracting the total cost of the reduced labor cost and the profit amount within the period. The estimated maintenance cost may be recalculated. In the step of determining the profitability, the profitability of the maintenance may be determined further based on a profit amount obtained by the maintenance.

  According to the present invention, in the determining step, profitability is determined based on the in-period reduction labor cost calculated by multiplying the reduction labor cost per unit period by the determination period and the estimated maintenance cost. Accordingly, since the facility operator can determine the profitability in consideration of the period of use after the facility is developed, the facility can be easily developed and effectively utilized. In addition, if it is determined that profitability is negative, the estimated maintenance cost required for the value obtained by subtracting the total cost of labor cost and revenue reduction within the period from the estimated maintenance cost is less than the threshold. Since it can be obtained by recalculation, it is possible to easily grasp how much the maintenance cost needs to be suppressed in order to ensure the profitability of the maintenance.

  The profitability determination method includes the step of storing a creation area indicating an area of a creation space created by the maintenance in the storage unit, and a unit revenue amount indicating a profit amount obtained from a unit area of the creation space. Storing the storage unit; and dividing the creation area by the unit area and multiplying the unit profit amount to calculate a creation profit amount obtained from the creation space, and further comprising the profit In the step of determining the profitability, the profitability of the maintenance may be determined using the generated revenue amount as the profit amount obtained by the maintenance.

  According to this invention, in the determining step, profitability is determined based on the estimated maintenance cost and the amount of profit obtained by the maintenance. Therefore, if revenue is gained from the development of the facility, the substantial expenditure for the development of the facility will be reduced, making it easier for the operator of the facility to make a decision to improve the facility. It becomes easier to use the facilities more effectively.

  The profitability determination method includes the step of storing the current use area, which is the use area per person of the staff before carrying out the maintenance, in the storage unit, and the staff planned after carrying out the maintenance. Storing a planned usage area that is a used area per person in the storage unit, and calculating the creation area based on at least the current usage area and the planned usage area .

  According to this invention, in the calculating step, the reduced labor cost or the amount of profit is calculated based on the detailed information, and in the determining step, the profitability by area is determined or the time when the profitability becomes positive is determined. You can do it. Therefore, the facility operator can make a more accurate determination based on the profitability of each area and the time when profitability is positive.

  The profitability determination device according to the second aspect of the present invention is a profitability determination device (for example, the profitability determination device 1 described later) for determining the profitability of facility maintenance, and is required for the maintenance. Estimated maintenance costs, which are estimated costs, current personnel costs, which are personnel costs of staff working at the facility before implementation of the maintenance, and personnel of staff working at the facility after implementation of the maintenance A storage control unit (for example, a storage control unit 143 to be described later) that stores the planned personnel cost, which is a cost, and a subtraction of the planned personnel cost from the current personnel cost, thereby reducing the reduction in personnel cost A calculation unit (for example, a calculation unit 144 described later) that calculates a reduction labor cost to be shown, and a determination unit that determines the profitability of the maintenance based on the estimated maintenance cost and the reduction labor cost (for example, determination described later) Part 145).

  The profitability determination program according to the third aspect of the present invention is a program for causing a computer to determine the profitability of facility maintenance, and is an estimated value of the maintenance cost required for the maintenance by the computer. The process of storing the estimated maintenance cost in the storage unit, the step of storing the current personnel cost, which is the personnel cost of the staff working at the facility, before the maintenance is performed, and the maintenance were performed. Reducing personnel costs indicating the amount of reduction in personnel costs by subtracting the estimated personnel costs from the current personnel costs, and a step of storing the expected personnel costs, which are personnel costs of staff who will work at the facility later, in the storage unit And a step of determining the profitability of the maintenance based on the estimated maintenance cost and the reduced labor cost.

  According to the present invention, there is an effect that the facility operator can determine the profitability of the facility maintenance in consideration of the profit generated by the facility maintenance.

It is a figure which shows the structure of the profitability determination apparatus which concerns on 1st Embodiment. It is an operation | movement flowchart of profitability determination in the profitability determination apparatus which concerns on 1st Embodiment. It is a figure which shows the example of the information which the profitability determination apparatus which concerns on 1st Embodiment uses for determination of profitability. It is an operation | movement flowchart of the profitability determination apparatus which concerns on 2nd Embodiment. It is a figure which shows the example of the information memorize | stored in a memory | storage part, when the profitability determination apparatus which concerns on 2nd Embodiment calculates the present labor cost. It is a figure which shows the example of the information memorize | stored in a memory | storage part, when the profitability determination apparatus which concerns on 2nd Embodiment calculates a plan labor cost. It is an operation | movement flowchart of the profitability determination apparatus which concerns on 5th Embodiment.

<First Embodiment>
[Basic configuration of profitability determination apparatus 1]
FIG. 1 is a diagram illustrating a configuration of a profitability determination apparatus 1 according to the first embodiment. The profitability determination apparatus 1 includes an input unit 11, a display unit 12, a storage unit 13, and a control unit 14. The profitability determination apparatus 1 is, for example, a computer, a tablet terminal, or a smartphone, and can determine the profitability of facility maintenance based on information input by a user.

The input unit 11 acquires information according to a user operation. The input unit 11 is, for example, a computer keyboard, a tablet terminal, or a smartphone touch panel.
The display unit 12 includes, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display. The display unit 12 displays characters, graphics, and the like under the control of the control unit 14.

  The storage unit 13 is configured by, for example, a ROM and a RAM. The storage unit 13 stores a profitability determination program for causing the profitability determination device 1 to function, various information input from the input unit 11 by the user, and various data generated by the control unit 14. The storage unit 13 may read and store a profitability determination program stored in a storage medium such as an external memory or a CD-ROM, or store a profitability determination program downloaded from an external device via a network. May be.

  The control part 14 is comprised by CPU, for example. The control unit 14 performs overall control of functions related to the profitability determination device 1 by executing the profitability determination program stored in the storage unit 13. Specifically, the control unit 14 functions as an input control unit 141, a display control unit 142, a storage control unit 143, a calculation unit 144, and a determination unit 145 by executing a profitability determination program.

[Configuration of Control Unit 14]
The input control unit 141 performs control for acquiring various types of information input by the user through the input unit 11. Specifically, the input control unit 141 stores various information acquired through the input unit 11 in accordance with the profitability determination program in the storage unit 13 through the storage control unit 143, or calculates the calculation unit 144 and the determination unit. Or output to 145.

  The display control unit 142 performs control for causing the display unit 12 to display character or graphic data. Specifically, the display control unit 142 causes the display unit 12 to display various types of information input by the user through the input unit 11, and causes the display unit 12 to display the results determined by the determination unit 145.

  The storage control unit 143 performs control for writing data to the storage unit 13 and reading data stored in the storage unit 13. For example, the storage control unit 143 receives various information input by the user from the input control unit 141 and writes the information in the storage unit 13. Further, the storage control unit 143 reads various information stored in the storage unit 13 in response to a request from the calculation unit 144 and outputs the various information to the calculation unit 144.

The calculation unit 144 calculates various data used by the profitability determination device 1 to determine profitability based on various information input by the user through the input unit 11. For example, the calculation unit 144 calculates a labor cost that is reduced by facility maintenance.
The determination unit 145 determines the profitability of facility maintenance based on various data calculated by the calculation unit 144.
Detailed functions and operations of the calculation unit 144 and the determination unit 145 will be described later.

[Flow chart of profitability judgment]
FIG. 2 is an operational flowchart of profitability determination in the profitability determination apparatus 1 according to the first embodiment. FIG. 3 is a diagram illustrating an example of information used by the profitability determination apparatus 1 for determination of profitability. Hereinafter, the operation of the profitability determination apparatus 1 determining profitability will be specifically described with reference to FIGS. 2 and 3.

  When the profitability determination program starts, first, the display control unit 142 estimates the cost required for facility maintenance (hereinafter referred to as estimated maintenance cost), the number of staff working at the facility before carrying out the maintenance. The display unit 12 displays a screen for inputting the current labor cost, which is the cost, and the planned labor cost, which is the labor cost of the staff working at the facility after the maintenance is performed. When the user inputs the estimated maintenance cost through the input unit 11, the storage control unit 143 stores the estimated maintenance cost acquired through the input control unit 141 in the storage unit 13 (S1). Here, the estimated maintenance cost is a predicted value of maintenance cost in the year for judging profitability. For example, the interior, exterior, housing, equipment, exterior, etc. of the building are inspected / refurbished, the floor plan, It is at least one of the cost required for the maintenance of hardware, such as changing the arrangement of equipment such as shelves, desks, chairs, etc., and the cost required for the maintenance of software, which reviews the arrangement of staff and work procedures.

  Specifically, the facility maintenance cost includes the cost required for extension and renovation of the building, which is the maintenance of the hardware, as well as the changes in the window work necessary for dealing with the outpatients, which are carried out together with the maintenance of the hardware, the staff Costs required for software development such as change of office flow, change of office room layout by improving document storage methods such as centralization of storage and sharing of documents, etc. including. For example, on the floor for outpatients, on the premise that the building after extension and renovation will be used, seats are arranged based on the flow line according to the work procedures such as receptionist, search / printing officer, payment officer, document issuer, etc. It is possible to improve the software to decide.

  In addition, the provision of a general window on the outpatient service floor to efficiently guide outpatients to the department in charge of the business is also included in the software development. Employees' office desks should be placed in “project units” instead of the conventional “linear island layout”, and cardboard spaces and dead spaces that are unattended should be avoided as much as possible. Software maintenance includes not fixing the desk or making it a free address so that it can accommodate personnel changes.

  The estimated maintenance cost is, for example, an estimated value of the cost required for maintenance of a facility composed of facility construction / repair costs, maintenance costs, and utility costs. Before the storage control unit 143 stores the estimated maintenance cost in the storage unit 13 in S1, the calculation unit 144 sets the maintenance cost actual value database, the construction cost actual value database construction time (for example, the construction year), You may calculate an estimated maintenance cost based on the time (for example, profitability determination year) which determines profitability. Specifically, the calculation unit 144 calculates a corrected actual value obtained by correcting the actual value of the maintenance cost based on the difference between the construction year and the profitability determination year and the correction coefficient associated with the length of time. The estimated maintenance cost can be calculated based on the corrected actual value. The maintenance cost actual value database is, for example, a real estate market database of the Ministry of Land, Infrastructure, Transport and Tourism, which is a public institution, and stores survey information such as revenue and expense survey data of rental properties that are regularly updated. .

The real estate market database is divided into 1 m ² units of rental business revenue and rental business expenses for each office, store, residence, and logistics facility building. (1) By region (nationwide, central Tokyo 5 wards, 5 Tokyo metropolitan area except for the ward, Chubu, Kinki, and other government-designated cities), (2) by total floor area (3,000m less than ^2, less than 3,000~10,000m ^2, 10,000~30,000m ² Less than 30,000 m ² ) and (3) stored by age (less than 10 years, less than 10 to 20 years, less than 20 to 30 years, more than 30 years).

The estimated maintenance cost of the profitability determination year is a prediction of the maintenance cost in the profitability determination year based on the actual value of the maintenance cost in the database construction year stored in the actual value database. Specifically, as shown in the following equation, the estimated maintenance cost SD1 uses the real economic growth rate (hereinafter referred to as GDP) as an indicator of economic trends, and determines the profitability based on the GDP of the database construction year. The accumulated GDP value up to the year is obtained as a correction coefficient, and is obtained by multiplying the maintenance cost actual value database SD0 by the correction coefficient KSD. The GDP in the following formula is a value obtained by dividing the value expressed in percentage by 100. i indicates the construction year of the database, and j indicates the profitability determination year. GDP is survey information that is regularly updated by the Statistics Bureau of the Ministry of Internal Affairs and Communications, and is available from the public database of the Statistics Bureau of the Ministry of Internal Affairs and Communications.

  When the user inputs the current labor cost through the input unit 11, the storage control unit 143 stores the current labor cost acquired via the input control unit 141 in the storage unit 13 (S2). In the example shown in FIG. 3A, information indicating that the current labor cost is 180,000,000 yen is stored in the storage unit 13.

  Further, when the user inputs the planned labor cost through the input unit 11, the storage control unit 143 stores the planned labor cost acquired through the input control unit 141 in the storage unit 13 (S3). In the example shown in FIG. 3A, information indicating that the scheduled labor cost is 135,000 thousand yen is stored in the storage unit 13.

  Subsequently, the calculation unit 144 acquires the current labor cost and the planned labor cost stored in the storage unit 13 via the storage control unit 143. The calculation unit 144 calculates a reduction labor cost indicating a reduction amount of the labor cost by subtracting the scheduled labor cost from the current labor cost (S4).

  In the case of the example shown in FIG. 3A, the calculation unit 144 calculates the reduction labor cost as 180,000,000 yen—135,000,000 = 45,000,000. That is, in the case of this example, it is shown that the labor cost of 45 million yen is expected to be reduced by improving the facilities. In the case of the example shown in FIG. 3B, the calculation unit 144 calculates the reduction labor cost as 15,000 thousand yen.

  Subsequently, the determination unit 145 determines the maintenance profitability based on the estimated maintenance cost stored in the storage unit 13 in S1 and the reduced labor cost calculated by the calculation unit 144 (S5). Specifically, the determination unit 145 compares the estimated maintenance cost stored in S1 with the reduced labor cost calculated in S4, and the value obtained by subtracting the reduced labor cost from the estimated maintenance cost is less than the determination threshold. If it is determined that the profitability is positive. The determination unit 145 determines that the profitability is negative if the value obtained by subtracting the reduction labor cost from the estimated maintenance cost is equal to or greater than the determination threshold. The determination threshold corresponds to, for example, a budget amount that can be secured for facility maintenance.

  For example, it is assumed that the estimated maintenance cost is 50,000 thousand yen and the determination threshold is 10,000 thousand yen. In the case of the example shown in FIG. 3A, since the 5,000 thousand yen obtained by subtracting the reduced labor cost of 45,000 thousand yen from the estimated maintenance cost of 50,000 thousand yen is less than the determination threshold, the determination unit 145 determines the profitability. Is determined to be positive. In the case of the example shown in FIG. 3B, since the 35,000 thousand yen obtained by subtracting the 150,000 thousand reduction labor cost from the estimated maintenance cost of 50,000 thousand yen is equal to or greater than the determination threshold, the determination unit 145 determines the profitability. Is determined to be negative.

  The determination unit 145 outputs and displays the determination result on the display unit 12 via the display control unit 142 (S6). The user can use the determination result displayed on the display unit 12 to determine whether or not the facility should be maintained.

  In the above description, the storage control unit 143 has been described as causing the storage unit 13 to store the current personnel cost and the planned personnel cost input in the input unit 11. However, the storage control unit 143 is not limited to other methods. The current labor cost and the planned labor cost acquired by the above may be stored in the storage unit 13. For example, the storage control unit 143 may acquire information indicating the current labor cost and the planned labor cost stored in a server that can communicate with the profitability determination apparatus 1 and store the information in the storage unit 13. Further, in response to an operation of registering in the input unit 11 after the current labor cost and the planned labor cost are input, the storage control unit 143 stores the current labor cost and the planned labor cost in the storage unit 13. Also good.

<Effect in the first embodiment>
As described above, according to the first embodiment, the calculation unit 144 subtracts the scheduled labor cost from the current labor cost stored in the storage unit 13, thereby obtaining a reduction labor cost indicating a reduction in labor cost. calculate. Then, the determination unit 145 determines the profitability of the maintenance based on the estimated maintenance cost of the facility and the reduction labor cost. Therefore, according to the profitability determination apparatus 1 according to the present embodiment, the user who determines whether or not to maintain the facility does not determine whether or not to perform maintenance based only on the estimated maintenance cost of the facility. Whether or not the maintenance is to be performed can be determined based on the profitability of the maintenance of the facility determined in consideration of the profit generated by the maintenance of the facility. At that time, the database on facility maintenance costs, etc. is not constructed by the user, but if it refers to the survey information regularly updated by public institutions, it is almost free of cost and is reliable. It can be used as a highly objective database. As a result, it is possible to perform a quantitative examination in a short time, and there is an effect that the existing facilities can be effectively utilized rationally.

<Second Embodiment>
[Determining profitability using unit cost and number of staff]
In the profitability determination apparatus 1 according to the first embodiment, the profitability is determined by receiving the labor cost required before the facility maintenance and the labor cost expected to be required after the facility maintenance. However, in the profitability determination apparatus 1 according to the second embodiment, the profitability is determined after calculating the current personnel cost and the planned personnel cost based on the unit cost of personnel costs and the number of employees. Different.

  FIG. 4 is an operational flowchart of profitability determination in the profitability determination apparatus 1 according to the second embodiment. FIG. 5 is a diagram illustrating an example of information stored in the storage unit 13 when the profitability determination device 1 calculates the current labor cost. FIG. 6 is a diagram illustrating an example of information stored in the storage unit 13 when the profitability determination device 1 calculates the scheduled labor cost. Hereinafter, an operation of determining profitability by the profitability determination apparatus 1 according to the second embodiment will be specifically described with reference to FIGS. 4, 5, and 6.

  When the profitability determination program starts, first, the display control unit 142 causes the display unit 12 to display a screen for inputting the estimated maintenance cost. When the user inputs the estimated maintenance cost through the input unit 11, the storage control unit 143 stores the estimated maintenance cost acquired through the input control unit 141 in the storage unit 13 (S1).

  Subsequently, the storage control unit 143 stores the current labor cost in the storage unit 13 (S2). Specifically, first, the display control unit 142 associates with the type to which the staff working at the facility belongs before the maintenance is performed, and calculates the current unit labor cost that is the average labor cost of the staff belonging to each type. A screen for input is displayed on the display unit 12. In addition, the display control unit 142 causes the display unit 12 to display a screen for inputting the current working number, which is the number of employees working at the facility, for each type before performing maintenance.

  The type to which the employee belongs is paid to the employee, for example, the employee type indicating whether the employee is a full-time employee or a temporary employee, the working hours indicating whether the employee is working full-time or part-time, or the length of service. It is the information which shows the attribute of the staff member who influences remuneration. The current unit personnel cost is, for example, the average annual salary, average monthly salary, or average hourly wage of the staff corresponding to each type. The current number of employees is the total number of employees working in the facility, or the total number of employees in the departments belonging to the area affected by the maintenance of the facility among the employees working in the facility.

  When the user inputs the current unit labor cost for each type of staff in the input unit 11, the storage control unit 143 associates the current unit labor cost acquired through the input control unit 141 with the type of staff in the storage unit 13. (S21). In the example shown in (A) of FIG. 5, the current unit labor cost of the first type of staff is 6 million yen (6,000,000 yen) on average, and the current unit labor cost of the second type of staff is average Information indicating that the annual income is 3 million yen (3,000,000 yen) is stored in the storage unit 13.

  Further, when the user inputs the current working number for each type of staff in the input unit 11, the storage control unit 143 associates the current working number acquired via the input control unit 141 with the type of staff and stores the storage unit 13. (S22). In the example shown in FIG. 5A, information indicating that the current working number of the first type of staff is 30 and the current working number of the second type of staff is 0 is stored in the storage unit 13. Remembered.

  Subsequently, the calculation unit 144 acquires the current unit labor cost and the current number of workers stored in the storage unit 13 via the storage control unit 143. The calculation unit 144 calculates the current labor cost, which is the labor cost required before maintenance, by multiplying the current unit labor cost by the current number of workers (S23). In the example shown in FIG. 5A, the calculation unit 144 calculates the current labor cost as 6,000,000 yen × 30 persons = 180,000,000 yen. The storage control unit 143 stores the current labor cost calculated by the calculation unit 144 in the storage unit 13.

  Subsequently, the storage control unit 143 stores the scheduled labor cost in the storage unit 13 (S3). Specifically, first, the display control unit 142 inputs the scheduled unit personnel cost that is the average personnel cost of the staff belonging to each type in association with the type to which the staff working at the facility belongs after carrying out the maintenance. Is displayed on the display unit 12. In addition, the display control unit 142 causes the display unit 12 to display a screen for inputting the planned number of employees who are the number of employees working at the facility after the maintenance is performed for each type.

  When the user inputs the scheduled unit personnel cost for each type of staff in the input unit 11, the storage control unit 143 associates the scheduled unit personnel cost acquired via the input control unit 141 with the type of staff in the storage unit 13 (S31). In the example shown in (A) of FIG. 6, the scheduled unit personnel cost of the first type of staff is 6 million yen (6,000,000 yen) on average, and the scheduled unit labor cost of the second type of staff is average Information indicating that the annual income is 3 million yen (3,000,000 yen) is stored in the storage unit 13. For example, the core work that is handled by a staff member who has a prescribed job authority is performed by a first-class employee, and non-core work such as office work and window work that does not require a given job authority is outsourced. Therefore, it is performed by the second type staff whose planned unit labor cost is lower than that of the first type staff.

  Further, when the user inputs the scheduled work number for each type of staff in the input unit 11, the storage control unit 143 associates the scheduled work number acquired via the input control unit 141 with the type of staff in the storage unit 13. (S32). In the example shown in FIG. 6A, information indicating that the first type of staff is 20 scheduled workers and the second type of staff is 5 is stored in the storage unit 13. Remembered. In the example of Fig. 5 and Fig. 6 (A), due to the maintenance of the facility, work is carried out by a second type of staff whose planned unit labor cost is lower than that of the first type of staff instead of the first type of staff. It is assumed that the total number of staff can be reduced.

  Subsequently, the calculation unit 144 acquires the scheduled unit personnel cost and the scheduled number of workers stored in the storage unit 13 via the storage control unit 143. The calculation unit 144 multiplies the scheduled unit personnel cost by the planned number of workers to calculate a scheduled personnel cost that is a labor cost required before maintenance (S33). In the example shown in FIG. 6A, the calculation unit 144 calculates the planned labor cost as 6,000,000 yen × 20 people + 3,000,000 yen × 5 people = 135,000,000 yen. The storage control unit 143 stores the scheduled labor cost calculated by the calculation unit 144 in the storage unit 13.

  Subsequently, the calculation unit 144 calculates a reduction labor cost indicating a reduction amount of the labor cost by subtracting the scheduled labor cost from the current labor cost (S4). In the case of the example shown in FIG. 5 and FIG. 6A, the calculation unit 144 calculates the reduction labor cost as 180,000 thousand yen−135,000 thousand yen = 45,000 thousand yen. That is, in the case of this example, it is shown that the labor cost of 45 million yen is expected to be reduced by improving the facilities. In the case of the example shown in FIG. 5 and FIG. 6B, the calculation unit 144 calculates 170,000 thousand yen−159,000 thousand yen = 11,000 thousand yen.

  Subsequently, the determination unit 145 determines the maintenance profitability based on the relationship between the estimated maintenance cost stored in the storage unit 13 in S1 and the reduced labor cost calculated by the calculation unit 144 (S5). Specifically, the determination unit 145 compares the estimated maintenance cost stored in S1 with the reduced labor cost calculated in S4, and the value obtained by subtracting the reduced labor cost from the estimated maintenance cost is less than the determination threshold. If it is determined that the profitability is positive. The determination unit 145 determines that the profitability is negative if the value obtained by subtracting the reduction labor cost from the estimated maintenance cost is equal to or greater than the determination threshold.

  For example, it is assumed that the estimated maintenance cost is 50,000 thousand yen and the determination threshold is 10,000 thousand yen. In the case of the example shown in FIG. 5 and FIG. 6A, since the 5,000 thousand yen obtained by subtracting the reduced labor cost of 45,000 thousand yen from the estimated maintenance cost of 50,000 thousand yen is less than the determination threshold, the determination unit 145 It is determined that the profitability is positive. In the case of the example shown in FIGS. 5 and 6B, since 39,000 thousand yen obtained by subtracting 11,000 thousand yen in reduced labor costs from 50 thousand yen in estimated maintenance costs is equal to or greater than the judgment threshold, It is determined that the profitability is negative.

  When the determination unit 145 determines that the profitability is negative, the calculation unit 144 calculates the amount of estimated maintenance cost necessary for the value obtained by subtracting the reduced labor cost from the estimated maintenance cost to be less than the determination threshold. It can be obtained by recalculation.

<Effect in 2nd Embodiment>
As described above, according to the second embodiment, the calculation unit 144 performs the current labor cost based on the current unit labor cost, the current working number of people, the scheduled unit personnel cost, and the scheduled working number stored in the storage unit 13. Then, the estimated personnel cost is calculated, and the reduced personnel cost indicating the reduction in the personnel cost is calculated by subtracting the estimated personnel cost from the current personnel cost. Then, the determination unit 145 determines the profitability of the maintenance based on the estimated maintenance cost of the facility and the reduction labor cost. Therefore, according to the profitability determination apparatus 1 according to the present embodiment, even if the user who determines whether or not to improve the facility cannot grasp the current labor cost and the planned labor cost, the current unit There is an effect that profitability can be determined while adjusting the labor cost, the current working number, the scheduled unit personnel cost, and the planned working number.

<Third Embodiment>
[Judge profitability within a specified period]
In the second embodiment, the current labor cost is calculated by multiplying the current unit labor cost input by the user and the current working number, and the planned personnel is multiplied by the planned unit labor cost and the scheduled working number. Expenses were calculated. Therefore, when the current unit labor cost or the scheduled unit labor cost input by the user is annual income, the determination unit 145 can determine the profitability when the facility is used for one year.
On the other hand, in the third embodiment, when the determination unit 145 uses the facility for a period longer than the period for which the current unit labor cost or the scheduled unit labor cost input by the user is calculated. This is different from the first embodiment in that the profitability is determined. This embodiment is suitable, for example, when the profitability is determined by recording the estimated labor cost required at the time of business consignment on the premise of placing an order over a plurality of years.

  Specifically, the display control unit 142 causes the display unit 12 to display a screen for inputting a determination period that is a period for which profitability is to be determined. The determination period corresponds to a period that is used when the determination unit 145 determines the profitability of the facility and is used continuously after the facility is maintained. When the user inputs a determination period at the input unit 11, the storage control unit 143 stores the determination period acquired via the input control unit 141 in the storage unit 13.

  The calculation unit 144 calculates an in-period reduction labor cost by multiplying the reduction labor cost per unit period calculated by the calculation unit 144 by the determination period. The determination unit 145 determines the profitability of the maintenance based on the estimated maintenance cost and the in-period reduction labor cost stored in the storage unit 13 in S1. That is, the determination unit 145 determines that the profitability is positive if the value obtained by subtracting the in-period reduction labor cost from the estimated maintenance cost is less than the determination threshold, and if the value is equal to or greater than the determination threshold, the profitability is negative. Judge that there is.

  In the example shown in FIG. 5 and FIG. 6B, in the second embodiment, the profitability is determined to be negative. Here, when the determination period is five years, the calculation unit 144 calculates the in-period reduction labor cost as 11,000 thousand yen × 5 = 55,000 thousand yen. Since the estimated maintenance cost of 50,000,000 yen minus the reduced labor cost of 55,000,000 yen is less than the judgment threshold of 10,000,000 yen, the judgment unit 145 has a positive profitability. Is determined.

  When the determination unit 145 determines that the profitability is negative, the calculation unit 144 subtracts the in-period reduction labor cost from the estimated maintenance cost to be less than the determination threshold value. An amount may be calculated.

<Effect in the third embodiment>
As described above, according to the third embodiment, the determination unit 145 determines the reduction labor cost per unit period and the estimated maintenance cost during the period calculated by multiplying the above determination period by the above-described determination period. Profitability is determined based on this. Therefore, since the facility operator can determine the profitability in consideration of the period of use after the facility is developed, the facility is easily developed and effectively utilized.

<Fourth Embodiment>
[Determining profitability considering the amount of revenue after maintenance]
In the above embodiment, the amount of profit generated by improving the facility has not been used for profitability determination. On the other hand, the fourth embodiment is different from the above-described embodiment in that the determination unit 145 determines profitability based on the profit amount generated by maintaining the facility.

  When a facility is developed, a space that is not used for work (hereinafter referred to as a creation space) may be created due to a layout change. By utilizing such a creation space, the facility operator can make a profit.

  An operator of the facility can earn revenue by renting the creation space, for example. The facility operator can also make a profit by reducing the area of the space used for business, and reducing the maintenance cost of the facility from before the maintenance.

  Therefore, in the profitability determination apparatus 1 according to the present embodiment, the display control unit 142 causes the display unit 12 to display a screen for inputting the amount of revenue obtained through maintenance. When the user inputs the amount of revenue through the input unit 11, the storage control unit 143 causes the storage unit 13 to store the amount of revenue acquired via the input control unit 141. The determination unit 145 determines profitability based on at least the profit amount and the estimated maintenance cost. Specifically, the determination unit 145 determines that the profitability is positive if the value obtained by subtracting the amount of revenue from the estimated maintenance cost is less than the determination threshold, and determines the value obtained by subtracting the amount of revenue from the estimated maintenance cost. If it is more than a threshold value, it will determine with profitability being negative.

  When the determination unit 145 determines profitability based on the profit amount obtained from the creation space, the display control unit 142 displays a screen for inputting the creation area indicating the area of the creation space created by the maintenance. 12 is displayed. When the user inputs the creation area at the input unit 11, the storage control unit 143 stores the creation area in the storage unit 13.

  In addition, the display control unit 142 causes the display unit 12 to display a screen for inputting the unit revenue amount indicating the revenue amount obtained from the unit area of the creation space. When the user inputs the unit revenue amount at the input unit 11, the storage control unit 143 stores the unit revenue amount in the storage unit 13.

  Subsequently, the calculation unit 144 calculates the amount of generated revenue obtained from the created space by dividing the created area by the unit area and multiplying by the unit revenue. For example, when the area of the creation space is 100 square meters and the unit revenue per month per square meter is 5,000 yen, the calculation unit 144 sets the generated revenue per month to 100 square meters x 5,000 yen. = 500 thousand yen. The calculation unit 144 can calculate the amount of generated revenue obtained from the created space within the period to be determined by multiplying the calculated amount of generated revenue by the determination period input by the user. The determination unit 145 determines profitability using the generated revenue amount calculated by the calculation unit 144 as the revenue amount obtained by the maintenance. The determination unit 145 may determine profitability based on the reduction labor cost used in the first embodiment, together with the amount of generated revenue and the estimated maintenance cost. For example, the determination unit 145 determines that the profitability is positive if the value obtained by subtracting the reduction labor cost and the amount of generated revenue from the estimated maintenance cost is less than the determination threshold, and the reduction labor cost and the generated revenue from the estimated maintenance cost. If the value obtained by subtracting the amount is equal to or greater than the determination threshold, it is determined that the profitability is negative.

  When the determination unit 145 determines that the profitability is negative, the calculation unit 144 subtracts the combined cost of the reduction labor cost during the period and the amount of revenue obtained during the determination period from the maintenance from the estimated maintenance cost. It is also possible to determine the amount of estimated maintenance costs necessary for the value to be less than the determination threshold. By doing in this way, the user can easily grasp how much the maintenance cost needs to be suppressed in order to ensure the maintenance profitability.

  In the above description, it has been described that the user inputs the creation area, but the calculation unit 144 can also calculate the creation area. Specifically, the display control unit 142 inputs the current usage area per person of the staff before maintenance, and the expected usage area per person of the staff expected after maintenance. A screen for displaying is displayed on the display unit 12. When the user inputs the current usage area at the input unit 11, the storage control unit 143 stores the current usage area in the storage unit 13. When the user inputs the planned usage area at the input unit 11, the storage control unit 143 stores the planned usage area in the storage unit 13.

  The calculation unit 144 calculates the creation area based on at least the current usage area and the planned usage area. For example, it is assumed that the area per employee used by the staff before the maintenance of the facility is 25 square meters, and the area per person planned to be used by the staff after the maintenance of the facility is 20 square meters. In the case of the example shown in FIG. 5A, since the first type staff of 30 people use the facility before maintenance, the current use area is 25 square meters × 30 people = 750 square meters. On the other hand, after maintenance, 25 first-class staff and second-class staff use the facilities, so the planned usage area is 20 square meters × 25 people = 500 square meters. Therefore, the calculation unit 144 calculates the creation area as 750 square meters−500 square meters = 250 square meters.

  The calculation unit 144 calculates the generated revenue amount by multiplying the calculated generated area by the revenue amount per unit area. When the unit revenue per month per square meter is 5,000 yen, the calculation unit 144 calculates the generated revenue per month as 250 square meters × 5,000 yen = 750 thousand yen. . Subsequently, the calculation unit 144 calculates the amount of generated revenue in the period for which profitability is to be determined by multiplying the amount of generated revenue per month by the determination period described in the third embodiment. The determination unit 145 can determine the profitability using the estimated maintenance cost and the amount of generated revenue.

  The calculation unit 144 uses, for example, a “floor area database per person” that stores information indicating the floor area per person, which is periodically issued by the Japan Building Association, a public organization. It is also possible to calculate the area used per employee. Therefore, the calculation unit 144 calculates the planned reduction number of persons by subtracting the current number of work persons from the planned work number, and multiplies the calculated planned reduction number by the use area per person obtained from the “floor area database per person”. Thus, the creation area may be calculated.

  In addition, as "Floor area database per person", (1) By industry (manufacturing and non-manufacturing), (2) By region (Tokyo, Tokyo, Nagoya, Osaka, Kinki, others), (3) Buildings By size (small building, medium building, large building), (4) by building age (completed before Showa 40, completed 41-50, Showa 51-60, completed Showa 61-1995 Databases classified into “completed, completed in 1996-2005, completed after 2006” are known.

  Further, the calculation unit 144 may calculate the generated revenue amount based on the net profit amount obtained by subtracting the rental business expenses from the revenue amount. In this case, the calculation unit 144 has a database of rental business performance values including information on rent revenue per unit area, common service revenue, and utility bill revenue, and maintenance management per unit area. Created by multiplying the amount of net income per unit area obtained by using the actual value database of rental business expenses including information on costs, utilities, and repair costs to maintain the function, and the creation area It is possible to calculate the amount of revenue.

<Effect in the fourth embodiment>
As described above, according to the fourth embodiment, the determination unit 145 determines profitability based on the estimated maintenance cost and the profit amount obtained by the maintenance. Therefore, when a profit is obtained by the improvement of the facility, the substantial expenditure due to the maintenance of the facility is reduced, which makes it easier for the operator of the facility to make a decision to improve the facility. As a result, existing facilities can be used more effectively.

<Fifth Embodiment>
[Examination of profitability in more detail according to profitability judgment results]
FIG. 7 shows an operation flowchart of the profitability determination apparatus 1 according to the fifth embodiment.
In said embodiment, the determination part 145 determined profitability using the average annual income of the staff as the current personnel expenses and the scheduled personnel expenses of the staff. In addition, the profitability was determined on the assumption that the current working number and the planned working number do not change with the passage of time.
On the other hand, the profitability determination apparatus 1 according to the fifth embodiment differs from the above-described embodiment in that the determination unit 145 determines profitability based on more detailed information.

  Specifically, as illustrated in S <b> 7 of FIG. 7, when the determination unit 145 determines that the profitability is positive, the profitability determination apparatus 1 determines the profitability based on more detailed information. The process proceeds to S8, and if the determination unit 145 determines that the profitability is negative, the profitability determination apparatus 1 ends the profitability determination.

  If it is determined in S7 that “profitability is positive”, the display control unit 142 causes the display unit 12 to display a screen for inputting detailed information. The detailed information is, for example, estimated maintenance costs for each area constituting the facility, personnel data for each area, used area for each area, revenue amount for each area, monthly personnel data, and personnel costs for each staff member. When the user inputs detailed information at the input unit 11, the storage control unit 143 stores the detailed information in the storage unit 13 (S8).

  The determination unit 145 determines profitability based on the detailed information stored in the storage unit 13 in S10 (S9). For example, the determination unit 145 determines the profitability of each area based on the estimated maintenance cost of each area, the reduction labor cost of each area, and the amount of income obtained in each area by the maintenance, and the display control unit 142 Then, the determination result is displayed on the display unit 12. In this way, the facility operator can easily identify areas with poor profitability and consider ways to improve profitability.

  Further, the calculation unit 144 calculates, for example, a reduction labor cost and a profit amount obtained by maintenance every month that has passed since the maintenance. The determination unit 145 determines profitability for each elapsed period since the maintenance based on the cumulative monthly amount of reduced labor costs and revenues, determines when the profitability is positive, and displays the control unit 142. The determination result is displayed on the display unit 12. The display unit 12 may display the monthly cumulative amount of reduced labor costs and profits.

<Effect in 5th Embodiment>
As described above, according to the fifth embodiment, the calculation unit 144 calculates the reduction labor cost or the amount of income based on the detailed information, and the determination unit 145 determines the profitability by area or determines the profitability. Can determine when will be positive. Therefore, the facility operator can make a more accurate determination based on the profitability of each area and the time when profitability is positive.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

For example, in the second embodiment, the storage control unit 143 stores the scheduled unit labor cost input by the user after calculating the current labor cost, but before calculating the current labor cost, The storage unit 13 may receive the input of the scheduled unit labor cost from the user.
In the first embodiment, the correction coefficient KSD is calculated by adding GDP. However, the real economic growth rate from the construction year of the database to the year for judging the profitability is sequentially multiplied. The correction coefficient KSD may be calculated as follows.

DESCRIPTION OF SYMBOLS 1 ... Profitability determination apparatus, 11 ... Input part, 12 ... Display part, 13 ... Memory | storage part, 14 ... Control part, 141 ... Input control part, 142 ... Display Control unit, 143 ... storage control unit, 144 ... calculation unit, 145 ... determination unit

Claims (3)

A profitability determination method for an information processing device to determine the profitability of facility maintenance,
Executed by the information processing apparatus;
Real economic growth rate GDP of the construction year in which the actual value database SD0 of the maintenance cost in which the actual value of the facility maintenance cost is stored and the real economic growth rate from the construction year to the profitability judgment year for judging the profitability Calculating a correction coefficient KSD based on a difference from the accumulated value of GDP, multiplying the correction coefficient KSD by the actual value database SD0 of the maintenance cost, and calculating an estimated maintenance cost SD1 in the profitability determination year;
Storing the estimated maintenance cost SD1 in a storage unit;
Storing the current personnel cost, which is the personnel cost of the staff working at the facility, before carrying out the maintenance in the storage unit;
Storing the planned personnel cost, which is the personnel cost of the staff working at the facility after carrying out the maintenance, in the storage unit;
Subtracting the scheduled labor cost from the current labor cost to calculate a reduced labor cost indicating a reduction in labor cost;
Storing a determination period, which is a period for which the profitability is determined, in the storage unit;
Determining the profitability of the maintenance based on the estimated maintenance cost, the reduced labor cost , and the amount of profit obtained within the determination period by the maintenance of the facility ,
If i is the database construction year and j is the profitability determination year,
In the step of calculating the estimated maintenance cost SD1 in the profitability determination year, the correction coefficient KSD is calculated by the following equation:

In the step of determining profitability, the estimated maintenance cost is obtained by subtracting the reduction labor cost within a period calculated by multiplying the reduction labor cost per unit period by the determination period, and the amount of revenue. If the amount is equal to or greater than the determination threshold, it is determined that the profitability is negative, and a value obtained by subtracting the total cost of the in-period reduction labor cost and the revenue amount from the estimated maintenance cost is less than the determination threshold. A profitability determination method characterized by repeatedly recalculating the estimated maintenance cost necessary for the improvement and improving profitability.
A profitability judging device for judging the profitability of facility maintenance,
Real economic growth rate GDP of the construction year in which the actual value database SD0 of the maintenance cost in which the actual value of the facility maintenance cost is stored and the real economic growth rate from the construction year to the profitability judgment year for judging the profitability A correction coefficient KSD is calculated based on a difference from the cumulative value of GDP, and the correction coefficient KSD is multiplied by the maintenance cost actual value database SD0 to calculate an estimated maintenance cost SD1 in the profitability determination year , By subtracting the planned personnel cost , which is the personnel cost of the staff working at the facility after carrying out the maintenance, from the current personnel cost, which is the personnel cost of the staff working at the facility before carrying out the maintenance, A calculation unit that calculates a reduction labor cost indicating a reduction in labor cost,
A storage control unit that stores the estimated maintenance cost, the current personnel cost, the scheduled personnel cost, and the profitability determination period in a storage unit;
A determination unit that determines the profitability of the maintenance based on the estimated maintenance cost, the reduced labor cost , and the amount of revenue obtained within the determination period by the maintenance of the facility ,
If i is the database construction year and j is the profitability determination year,
When calculating the estimated maintenance cost SD1 in the profitability determination year, the correction coefficient KSD is calculated by the following equation .

A program for making a computer judge the profitability of facility maintenance,
In the computer,
Real economic growth rate GDP of the construction year in which the actual value database SD0 of the maintenance cost in which the actual value of the facility maintenance cost is stored and the real economic growth rate from the construction year to the profitability judgment year for judging the profitability A step of calculating a correction coefficient KSD based on a difference from the accumulated value of GDP and storing the estimated maintenance cost SD1 in the profitability determination year obtained by multiplying the correction coefficient KSD by the actual value database SD0 of the maintenance cost in the storage unit. When,
Storing the current personnel cost, which is the personnel cost of the staff working at the facility, before carrying out the maintenance in the storage unit;
Storing the planned personnel cost, which is the personnel cost of the staff working at the facility after carrying out the maintenance, in the storage unit;
Subtracting the scheduled labor cost from the current labor cost to calculate a reduced labor cost indicating a reduction in labor cost;
Storing the profit amount obtained within the determination period for determining the profitability after carrying out the maintenance in the storage unit;
Determining the profitability of the maintenance based on the estimated maintenance cost, the reduced labor cost , and the profit amount ,
If i is the database construction year and j is the profitability determination year,
When calculating the estimated maintenance cost SD1 in the profitability determination year, the correction coefficient KSD is calculated by the following equation .

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