Abstract:
The present invention relates to an environmental load assessment system, which is capable of efficiently and simply assessing an environmental load of a building in all stages (e.g., a planning stage, a design stage, a construction stage, and a use stage after construction) in doing executing a business by subdividing an assessment process, such as simple assessment in the design stage, detailed assessment in the start stage, and site assessment in the construction stage according to the progress of a construction project. The system of the present invention includes a DB server for storing material information, environmental load information, and itemized material information about a construction work and storing environmental load information about an energy source; a management server for assessing environmental loads based on simple assessment, a detailed assessment, and site assessment according to the progress of a target assessment construction project; and a UI server for providing user terminals with an execution environment so that the management server can be operated.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    Priority to Korean patent application number 10-2011-0004344 filed on Jan. 17, 2011, the disclosure of which is incorporated by reference herein, is claimed. 
       FIELD OF THE INVENTION 
       [0002]    The present invention relates to an environmental load assessment system of a building, including energy consumption and CO 2  emissions, during the life cycle and, more particularly, to an environmental load assessment system, which is capable of efficiently and simply assessing an environmental load of a building in all stages (e.g., a planning stage, a design stage, a construction stage, and a use stage after construction) in doing executing a business by subdividing an assessment process, such as simple assessment in the design stage, detailed assessment in the start stage, and site assessment in the construction stage according to the progress of a construction project. 
       BACKGROUND OF THE RELATED ART 
       [0003]    International Environmental Agreement in preparation for global warming has been consistently developed up to now since the 1970&#39;s. In order to conserve the earth that has faced a worldwide environmental crisis, there was Declaration of the United Nations Conference on the Human Environment in Stochholm on June, 1972. A Sustainable Development concept that the current development must fairly satisfy the need of the current generation and future generations was declared as an official object of United Nations in Rio Summit on June, 1992. The international environment agreements are expanding towards the enforcement execution of a reduction in carbon dioxide emissions. 
         [0004]    The construction industry belongs to a large-scale consumption field which occupies 40% or higher of natural resources consumption, 30% or higher of energy consumption, and 30% or higher of carbon dioxide emissions. The construction industry is becoming one of the major international arguing points in countermeasures for global environmental issues. Accordingly, in environmentally advanced countries, a variety of researches have been made on the assessment of carbon dioxide during the life cycle of a building in a nation level since the early part of the 1990&#39;s. 
         [0005]    In Korea, in order to actively deal with the Climatic Change Convention and enhance sustainable development and international environment competitiveness, a variety of eco-friendly construction technologies are being developed. However, researches on the assessment of carbon dioxide emissions of a building have not yet been relatively active, as compared with the development speed of the eco-friendly construction technologies. Researches on the assessment of carbon dioxide emissions of a building have recently been attempted. One of the researches is Korean Patent Registration No. 10-0934979 entitled ‘Method for Assessment Environment Impact during Life Cycle of Sustainable Building’. 
         [0006]    Programs developed so far, including the above patent 10-0934979, are chiefly based on a method of assessing carbon dioxide emissions by simply inputting a material calculation document written after 5 months since the start of a building, but do not suggest the assessment of building planning and basic design stages of a building, carbon dioxide reduction technology/eco-friendly technology for an eco-unfriendly building, and the reflection of the suggested technologies in the design stage. Furthermore, the construction format of the programs is chiefly based on Microsoft&#39;s Excel program, and the programs are used for only simple assessment on apartment houses and are difficult to analyze and update a database (DB) based on a result of the assessment. 
       SUMMARY OF THE INVENTION 
       [0007]    Accordingly, the present invention has been made to overcome the limits of a conventional system for assessing an environmental load, and it is an object of the present invention to provide an environmental load assessment system, which is capable of simply assessing an environmental load during the life cycle of a building and of updating the database of the assessment system in real time based on an assessment history and functions of accumulating and analyzing data, not only in the design stage (e.g., a building planning stage and a basic design stage) (i.e., the initial business stage of a building), but also in any stage (e.g., a planning stage, a design stage, a construction stage, or a use stage after construction) of a business execution stage. 
         [0008]    To achieve the above object, the present invention provides a system connected to one or more user terminals and configured to assess an environmental load, including energy consumption and carbon dioxide emissions, of an building during the life cycle according to the progress of a construction project. The system includes a DB server for storing material information, environmental load information, and itemized material information about a construction work and storing environmental load information about an energy source; a management server for assessing environmental loads based on simple assessment, a detailed assessment, and site assessment according to the progress of a target assessment construction project; and a UI server for providing user terminals with an execution environment so that the management server can be operated. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which: 
           [0010]      FIG. 1  is a diagram showing an overview of an environmental load assessment system according to an embodiment of the present invention; 
           [0011]      FIG. 2  shows the construction of a management server of the environmental load assessment system according to an embodiment of the present invention; 
           [0012]      FIGS. 3A and 3B  are diagrams showing an overview of a project creation module and an execution screen thereof in a management server according to the construction diagram of  FIG. 2 ; 
           [0013]      FIGS. 4A to 4I  are diagrams showing an overview of a simple assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 ; 
           [0014]      FIGS. 5A to 5I  are diagrams showing an overview of a detailed assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 ; 
           [0015]      FIGS. 6A to 6G  are diagrams showing an overview of a site assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 ; 
           [0016]      FIG. 7  is a diagram showing an overview of a completion assessment module in the management server according to the construction diagram of  FIG. 2 ; 
           [0017]      FIGS. 8A to 8H  are diagrams showing an overview of an assessment analysis module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 ; and 
           [0018]      FIGS. 9A to 9C  are diagrams showing execution screens of a system management module in the management server according to the construction diagram of  FIG. 2 . 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0019]    Some exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 
         [0020]      FIG. 1  is a diagram showing an overview of an environmental load assessment system according to the present invention. The environmental load assessment system according to the embodiment of the present invention is connected to one or more user terminals and is configured to include a DB server, a management server, and a User Interface (UI) server in order to assess an environmental load, including energy consumption and CO 2  emissions, during the life cycle of a construction project according to the progress of the project. 
         [0021]    The DB server is configured to store material information, environmental load information, and itemized material information about a construction work and to store environmental load information about an energy source. Furthermore, the DB server may store a variety of building laws, a variety of calculation equations, and so on. The DB server may employ data that has already been constructed in other system pertinent to construction. The DB server may be updated using data when the data is accumulated according to the active utilization of the system according to the present invention. The various data stored in the DB server may be changed by tasks, such as the modification, addition, and deletion of a system administrator. 
         [0022]    The management server is configured to perform simple assessment based on simple material calculation, detailed assessment based on detailed material calculation, and site assessment based on site material calculation for a target assessment construction project. More particularly, the management server is configured to include a project creation module, a simple assessment module, a detailed assessment module, a site assessment module, a completion assessment module, an assessment analysis module, and a system management module. Here, the term ‘˜module’ is an element implemented using hardware or software in order to process one or more functions or operations, and a detailed function or operation of each module is described in detail later with reference to  FIG. 3A . 
         [0023]    The UI server is a UI environment (i.e., input and output environments) which provides an execution environment to the user terminals in order to perform the operation of the management server. 
         [0024]    Users who use the assessment system according to the present invention may be classified into administrators who have server management rights to a change of the contents and forms in the DB server, the management server, and the UI server and to user management and into assessors who have assessment rights to access the management server and perform a substantial assessment work. Access of the users to the servers may be restricted according to use rights. The administrator may also serve as an assessor, and the assessor may be classified into upper and lower assessors. 
         [0025]      FIG. 2  shows the construction of the management server of the environmental load assessment system according to an embodiment of the present invention, and Figures following  FIG. 3A  show execution screens which are implemented by the management server according to the construction of  FIG. 2 . As shown, the management server is configured to include the project creation module, the simple assessment module, the detailed assessment module, the site assessment module, the completion assessment module, and the assessment analysis module. The management server is also configured to include a user certification module and a system management module for system management. Hereinafter, the construction state of the management server, and data and interface environments provided through the DB server and the UI server are described through a process of the assessor, also serving as the administrator, accessing the assessment system according to the present invention and performing an environmental load assessment work for an apartment house project. 
         [0026]      FIGS. 3A and 3B  are diagrams showing an overview of the project creation module and an execution screen thereof in a management server according to the construction diagram of  FIG. 2 . 
         [0027]    The project creation module is implemented to create an assessment model for each assessment method, including simple assessment based on simple material calculation, detailed assessment based on detailed material calculation, and site assessment based on site material calculation for a target assessment construction project. Furthermore, the project creation module is implemented to create a completion assessment model. In  FIG. 3B , each assessment model is created by inputting a project business name to a project creation window which is created by a ‘Project Creation (         )’ key in an ‘Assessment LIST (          LIST)’ menu, and the created assessment model is configured to perform a relevant assessment work while operating in conjunction with the assessment modules. Furthermore, in  FIG. 3B , the progress of assessment for each assessment model for each construction project which is created through the ‘Assessment LIST (          LIST)’ menu, and the assessment modules for respective assessment models are accesses step by step according to a time-series relationship of data. 
         [0028]      FIGS. 4A to 4I  are diagrams showing an overview of the simple assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 . The simple assessment module may be accessed through a ‘Simple Assessment (         )’ menu which is created through the project creation module as in  FIG. 3B . 
         [0029]    The simple assessment module is implemented to assess an environmental load of a target assessment construction project according to the simple assessment model while operating in conjunction with the DB server and the project creation module. Accordingly, the simple assessment module performs simple assessment for the environmental load on the basis of simple material calculation in relation to a planning design plan of the target assessment construction project. That is, the simple assessment module is implemented to perform simple assessment for an environmental load of a building during the life cycle by approximately estimating the amounts of major materials used according to the characteristic of the building, when the building is planned and design. The environmental load assessed by the simple assessment module may be used to determine a planning design plan to a construction project. A reduction proposal of an environmental load and environmental load reduction technology/eco-friendly technology can be applied in the building design stage through such decision-making with consideration taken of the assessment results. The simple assessment module may be configured to include substructures, such as a design information setting unit, a construction stage assessment unit, an operation/management stage assessment unit, a demolition/disposal stage assessment unit, and an assessment result analysis unit. 
         [0030]    The design information setting unit of the simple assessment module is configured to receive planning design information about a target assessment construction project in the project design stage. The planning design information is information about a design plan of the target assessment construction project, and it may include pieces of basic information, such as a project name (         ), a site location (         ), a regional district (         ), a use (         ), a structure (         ), plottage (         ), a building area (         ), a floor space index (         ), an architectural construction (         ), and a gross floor area (         ), and pieces of detailed information, such as a new generation energy production plan (         ) and a ground floor design plan (         ). The planning design information may be inputted by the assessor using a direct entry method, an upload method, or a calculation method. Alternatively, the assessor may modify and input the planning design information in the state in which default values have been automatically set.  FIGS. 4B and 4C  show that various pieces of basic information and detailed information about an apartment house project are inputted through a ‘Essential Information Input (         )’ menu and a ‘Optional Information Input (         )’ menu in the ‘Basic Information (         )’ menu by using a direct entry method, an upload method (‘Search (         )’), a calculation method (‘Gross Floor Area Calculation (         )’). 
         [0031]    The construction stage assessment unit of the simple assessment module is configured to receive the simple amount of materials and energy consumption of a target assessment construction project which will be used in the building construction stage on the basis of the planning design information set in the design information setting unit and the various pieces of information stored in the DB server and to simply calculate an environmental load (including energy consumption and CO 2  emissions) in the construction stage based on the pieces of the simple amount. When the simple amount of materials is calculated and received and the energy consumption is received in the form of preliminary estimates based on material information and itemized material information stored in the DB server, the construction stage assessment unit calculates the environmental load based on the environmental load information.  FIG. 4D  shows the screen in which the amount of major construction materials for each construction sector is calculated and received (automatic input) through the ‘Production Stage (         )’ menu of a ‘Construction Stage (         )’ menu, energy consumed in the production stage of the construction materials and CO 2  emissions according to the energy consumption is calculated, and an environmental load is calculated based on the above information.  FIG. 4E  shows the screen in which energy consumption for the transport of materials and the operation of construction equipment and CO 2  emissions according to the use of an energy source are received (direct input by the assessor) through the ‘Production Stage (         )’ menu and the ‘Working Stage (         )’ menu of the ‘Construction Stage (         )’ menu and an environmental load is calculated. 
         [0032]    The operation/management stage assessment unit of the simple assessment module is configured to receive and calculate energy consumption for the operation of a building and the simple amount of materials for the maintenance and management of the building which will be used in the building operation/management stage on the basis of the planning design information set in the design information setting unit and the various pieces of information stored in the DB server and to calculate an environmental load in the building operation/management stage. In the case where a design plan of a target assessment construction project is used according to its use, the operation/management stage assessment unit calculates an environmental load by estimating energy consumption and maintenance and management materials.  FIGS. 4F and 4G  show the screens in which energy consumption for each building operation is received according to a calculation method (e.g., a direct input method, an estimation model method, or an building energy efficiency rating method) and an environmental load is calculated based on the energy consumption and the simple amount of materials for building maintenance and management is received and an environmental load is calculated, respectively, through the ‘Maintenance/Management Stage (         )’ menu of the ‘Operation Stage (         )’ menu. 
         [0033]    The demolition/disposal stage assessment unit of the simple assessment module is configured to receive the amount of wastes to be discharged and energy consumption to be used in the building demolition/disposal stage in relation to the target assessment construction project on the basis of the planning design information set in the design information setting unit and the various pieces of information stored in the DB server and to calculate an environmental load in the building demolition/disposal stage. The demolition/disposal stage assessment unit calculates the amount of wastes based on the material information and the itemized material information stored in the DB server, receives energy consumption, and calculates the environmental load based on the environmental load information.  FIG. 4H  shows the screen in which the amount of wastes is calculated and received through a ‘Demolition/Disposal Stage (         )’ menu and energy consumed in disposal equipment for processing the amount of wastes, waste transport vehicles, and waste burial vehicles is received and an environmental load is calculated based on the above information. 
         [0034]    The assessment result analysis unit of the simple assessment module is configured to integrally summarize and analyze an environmental load calculation result obtained by the construction stage assessment unit, the operation/management stage assessment unit, and the demolition/disposal stage assessment unit and to provide an environmental load assessment result. The environmental load assessment result provided by the assessment result analysis unit may be diagrammed in the form of various graphs through the UI server, as shown in  FIG. 4I . 
         [0035]      FIGS. 5A to 5I  are diagrams showing an overview of the detailed assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 . The detailed assessment module may be accessed through the ‘Detailed Assessment (         )’ menu created by the project creation module as in  FIG. 3B . 
         [0036]    The detailed assessment module is implemented to operate in conjunction with the DB server and the project creation module and to assess an environmental load of a target assessment construction project according to the detailed assessment model. The detailed assessment module in detail assesses an environmental load on the basis of detailed material calculation for a start design plan of a target assessment construction project. That is, the detailed assessment module is implemented to in detail assess an environmental load of a building during the life cycle in the start stage. The environmental load assessed by the detailed assessment module is used in a site construction plan of a construction project and a building operation and management plan. The detailed assessment module may be configured to include a start information setting unit, a construction stage assessment unit, an operation/management stage assessment unit, a demolition/disposal stage assessment unit, and an assessment result analysis unit. The above elements are generally the same as those of the above-described simple assessment module except that an environmental load is calculated on the basis of detailed material calculation. In other words, the start information setting unit receives start design information about a target assessment construction project in the project start stage and calculates an environmental load on the basis of the amount of calculated detailed materials. 
         [0037]      FIGS. 5B and 5C  are execution screens in which start design information is set by the start information setting unit of the detailed assessment module. The start information setting unit may be implemented to operate in conjunction with the design information setting unit of the simple assessment module, to receive planning design information, and to have the planning design information modified. The start information setting unit may receive modified information of the planning design information as the start design information. 
         [0038]      FIGS. 5D and 5E  show execution screens in which an environmental load in the construction stage is calculated by the construction stage assessment unit of the detailed assessment module. As shown, the detailed amount of construction materials is received for each construction sector and for each process, an environmental load in the production stage of the construction materials is calculated, energy consumption for the transport of the materials transport and the operation of construction equipment is received, and an environmental load according to the use of an energy source is calculated. In  FIGS. 5D and 5E , when information calculated based on common material information and environmental load information is received as a ‘Standard (         )’ value through the ‘Production Stage (         )’ menu and ‘Working Stage (         )’ menu and information determined by the assessor is received as an ‘Assessment (         )’ value, an environmental load of a relevant target assessment construction project is calculated as the ‘Standard (         )’ value and the ‘Assessment (         )’ value. Furthermore, items may be added through a ‘Material Addition (         )’ key or an ‘Energy Source Addition (         )’ key, and the ‘Standard (         )’ value may be copied as the ‘Assessment (         )’ value through a ‘Amount Copy (         )’ key. 
         [0039]      FIGS. 5F and 5G  show execution screens in which the operation/management stage assessment unit of the detailed assessment module calculates an environmental load in the operation/management stage. As shown, energy consumption for a building operation is received according to a calculation method (e.g., a direct input method, an estimation model method, or an building energy efficiency rating method), an environmental load is calculated based on the energy consumption, the detailed amount of materials for the maintenance and management of a building is received, and an environmental load is calculated based on the detailed amount of materials. The operation/management stage assessment unit of  FIGS. 5F and 5G  are implemented to calculate the environmental load as a ‘Standard (         )’ value and an ‘Assessment (         )’ value, like the construction stage assessment unit of  FIGS. 5D and 5E . 
         [0040]      FIG. 5H  shows an execution screen in which the demolition/disposal stage assessment unit calculates an environmental load in the demolition/assessment stage through the detailed assessment module.  FIG. 5I  shows an execution screen in which the assessment result analysis unit is executed in the detailed assessment module. This is the same as  FIGS. 4H and 4I . 
         [0041]      FIGS. 6A to 6G  are screens showing an overview of the site assessment module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 . The site assessment module, as shown in  FIG. 3B , may be accessed through the ‘Site Assessment (         )’ menu created by the project creation module. 
         [0042]    The site assessment module is implemented to operate in conjunction with the DB server and the project creation module, to assess an environmental load of a target assessment construction project according to the site assessment model, and to assess an environmental load on the spot on the basis of site material calculation. The environmental load assessed by the site assessment module is used as basic data for assessing an environmental load of other construction projects. The site assessment module may be configured to include a site information setting unit, an assessment history creation unit, a site construction stage assessment unit, and an assessment result analysis unit. The elements of the site assessment module may be said to correspond to the start information setting unit, the construction stage assessment unit, and the assessment result analysis unit of the detailed assessment module. 
         [0043]    The site information setting unit of the site assessment module is implemented to receive site construction information in the project site construction stage and environmental load plan information in the site construction stage in relation to a target assessment construction project. The site information setting unit, as in  FIG. 6B , is implemented to operate in conjunction with the start information setting unit of the detailed assessment module, to receive start design information, and to have the start design information modified. Accordingly, the site information setting unit is implemented to receive modified data of the start design information as site construction information and to receive calculated data while operating in conjunction with the construction stage assessment unit of the detailed assessment module. Accordingly, the site information setting unit can receive the modified data of calculated data as environmental load plan information. 
         [0044]    The assessment history creation unit of the site assessment module is implemented to generate an environmental load site assessment model according to the progress percent of a target assessment construction project.  FIG. 6C  shows a screen in which the progress percent is inputted in a window created by an ‘Assessment History Creation (         )’ key in an ‘Assessment History Management (         )’ menu. The assessment history creation unit is configured to generate a site assessment model according to the progress percent for daily assessment while operating in conjunction with the construction stage assessment unit of the detailed assessment module and, when an assessment date is clicked on, to access the site construction stage assessment unit. Furthermore, an environmental load assessment history according to the progress percent for daily assessment is managed in the ‘Assessment History Management (         )’ menu. 
         [0045]    The site construction stage assessment unit of the site assessment module is implemented to operate in conjunction with the assessment history creation unit and to assess an environmental load of a target assessment construction project according to the progress percent in the building site construction stage. The site construction stage assessment unit receives the detailed amount of materials used according to the progress percent, calculates an environmental load of a target assessment construction project according to the progress percent on the basis of the detailed amount of materials, and calculates an environmental load by comparing the calculated environmental load with the environmental load calculated by the construction stage assessment unit of the detailed assessment module. 
         [0046]      FIG. 6D  shows a screen in which, when the assessment date is clicked from the assessment history items in  FIG. 6C , the ‘Production Stage (         )’ menu is accessed and the site construction stage assessment unit is executed. In  FIG. 6D , when the ‘Assessment (         )’ value for each construction and for each construction sector, calculated by the construction stage assessment unit of the detailed assessment module, is automatically received as a ‘Plan (         )’ value and the amount of material used in an actual site is received as a ‘Practical Amount (         )’, an environmental load in the construction material production stage for a relevant progress percent is calculated. Furthermore, after an environmental load according to the production of used construction materials is calculated, the ‘Working Stage (         )’ menu of  FIG. 6E  is accessed, detailed energy consumption according to site construction conditions, such as the transport of materials, used equipment, a field office, and new generation energy, is received, and an environmental load is calculated based on the detailed energy consumption. Accordingly, a site assessment work can be performed by taking the actual amount of materials used and the ratio of use according to the progress percent. 
         [0047]    The assessment result analysis unit of the site assessment module, as shown in  FIGS. 6F and 6E , integrally analyzes an environmental load calculation result calculated by the site construction stage assessment unit and provides an environmental load assessment result.  FIG. 6F  is a screen showing an assessment result according to the progress percent, and  FIG. 6E  is a screen showing an assessment result when the progress percent 100% has been achieved and a site construction of a construction project has been finally completed. 
         [0048]      FIG. 7  is a diagram showing an overview of the completion assessment module in the management server according to the construction diagram of  FIG. 2 . The completion assessment module, as shown in  FIG. 3B , may be accessed through the ‘Completion Assessment (         )’ menu created by the project creation module. 
         [0049]    The completion assessment module is implemented to operate in conjunction with the project creation module and the site assessment module and to assess an environmental load of a target assessment construction project according to the completion assessment model. The completion assessment module is implemented to receive a calculation result when the progress percent is 100% through the site construction stage assessment unit of the site assessment module. However, such completion assessment is site assessment when the progress percent 100%, but can be made even after an assessment work of the progress percent 100% is performed by the site construction stage assessment unit of the site assessment module. Accordingly, the completion assessment module may be simply implemented in such a way as to access the execution screen (corresponds to  FIG. 6D ) of the site construction stage assessment unit when the progress percent is 100%. Furthermore, the completion assessment module may be implemented to operate in conjunction with the detailed assessment module and to receive calculated data through the operation/management stage assessment unit and demolition/disposal stage assessment unit of the detailed assessment module. Accordingly, the completion assessment module can simultaneously manage an actually measured assessment result for an environmental load in the construction process and a predicted assessment result for an environmental load in the operation/management process and for an environmental load in the demolition/disposal process in relation to a completed construction project. 
         [0050]      FIGS. 8A to 8H  are diagrams showing an overview of the assessment analysis module and execution screens thereof in the management server according to the construction diagram of  FIG. 2 . 
         [0051]    The assessment analysis module is implemented to operate in conjunction with the project creation module, the simple assessment module, the detailed assessment module, and the completion assessment module and to integrally summarize and analyze an assessment result assessed for each target assessment construction project. Data analyzed by the assessment analysis module is used as basic data when assessing an environmental load of a new construction project. The assessment analysis module may be configured to include an assessment history management unit and an assessment result analysis unit. 
         [0052]    The assessment history Management unit of the assessment analysis module is configured to summarize and manage a target assessment construction projects history created through the project creation module and also to integrate and manage assessment results assessed for each target assessment construction project through the simple assessment module, the detailed assessment module and the completion assessment module. The assessment history Management unit becomes a kind of an assessment DB, and it is used as basic data of the assessment result analysis unit. The assessment history Management unit may be executed as in  FIG. 8B . 
         [0053]    The assessment result analysis unit is configured to extract data managed in the assessment history management unit and to perform analysis for each target assessment construction project. The present invention proposes that the assessment result analysis unit includes an environmental load-based comparison analysis part and an assessment contents-based assessment analysis part. Data analyzed by the assessment result analysis unit is provided to the DB server as material information and environmental load information and may be used as basic data for simple assessment and detailed assessment when assessing other construction projects. 
         [0054]    The environmental load-based comparison analysis part is configured to extract data, selected by a user, from data managed in the assessment history management unit and to compare and analyze environmental loads according to the types of the environmental loads. The environmental load-based comparison analysis part may be executed as shown in  FIGS. 8C and 8D .  FIGS. 8C and 8D  are diagrams showing comparison results of energy consumption and CO 2  emissions according to assessment models (e.g., simple assessment, detailed assessment, and completion assessment) in relate to one construction project. 
         [0055]    The assessment contents-based assessment analysis part is configured to extract data, assessed by the detailed assessment module or the completion assessment module, from data managed in the assessment history management unit and to analyze an environmental load according to assessment contents for each target assessment construction project. The assessment the contents-based assessment analysis part may be executed as shown in  FIGS. 8E to 8H .  FIG. 8E  shows a result in which assessment results of an environmental load, obtained by the detailed assessment module in the construction stage, are summarized and analyzed.  FIG. 8F  shows a result in which major emission materials of CO 2  are extracted, analyzed, and summarized in the assessment results of the environmental load, obtained by the detailed assessment module, in the construction stage.  FIG. 8G  shows a result in which assessment results of an environmental load obtained by the completion assessment module (they are the same as the assessment results obtained by the site assessment module in the site construction stage) are extracted, analyzed, and summarized.  FIG. 8H  shows a result in which assessment results of an environmental load, obtained by the detailed assessment module in the operation/management stage, are extracted, analyzed, and summarized. 
         [0056]    Furthermore, the management server of the environmental load assessment system according to the present invention is configured to include a user certification module and a system management module. The user certification module and the system management module are constructed in a similar manner to other modules.  FIGS. 9A to 9C  are diagrams showing execution screens of the system management module in the management server according to the construction diagram of  FIG. 2 .  FIG. 9A  shows a screen in which system users are managed.  FIG. 9B  shows a screen in which target assessment construction projects are managed.  FIG. 9C  shows a screen in which a DB used as an assessment index is managed. 
         [0057]    As described above, the present invention may have the following advantages. 
         [0058]    First, a design plan in which an environmental load, together with a feasibility review, is taken into consideration can be induced because an environmental load of a building during the life cycle can be assessed in a planning stage. Furthermore, an environmental load of a planned building is estimated through detailed assessment using a material calculation history document in the start stage of a building, and an environmental load according to an earned value of VE activities and materials in a site are actually measured in the site construction stage of a building. Accordingly, more accurate assessment can be performed for each stage. In addition, since assessment results for stages are compared and analyzed and a DB is constructed using the comparison and analysis results, practical values according to the accumulation of the assessment results can be calculated, and accuracy can be increased. Furthermore, various projects can be assessed and managed through project-based comparison and analysis. 
         [0059]    Second, a detailed assessment result and a construction site assessment result can be compared and analyzed based on detailed assessment result data, estimated in the start stage, and energy consumption and material production data actually used in the site construction stage. The analysis results may be utilized as evidence data pertinent to the carbon reduction activities of a construction company in the case where regulations related to Certified Emission Reduction (CER) are put in practice in the future. The analysis results may help earned values and VE activities through real-time monitoring. 
         [0060]    Third, user convenience can be improved because the system of the present invention can be constructed and provided on the basis of a web. In particular, the system of the present invention can be utilized as a decision-making tool for efficient assessment and management of an environmental load because assessment staffs can conveniently communicate with each other and newly proposed eco-friendly technological factors can be easily taken into account. 
         [0061]    While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.