Cost estimating system

A data estimating system for estimating a construction cost of a desired building having desired factors including a desired total floor area by statistically processing building construction cost data, said system comprising:

• memory means for storing the building construction cost data;
• classifying means for classifying building construction cost data stored in said memory means into specific classes and grades of classes according to total floor area and other factors;
• input means for inputting desired factors of a desired building including desired total floor area;
• and
• calculating means for estimating the construction cost of the desired building having the desired factors on the basis of a ratio of a weighed average value of the square-meter costs for a building of a specific class that is substantially equivalent to the desired building having the desired input total floor area and a weighed average value of square-meter costs for a building of a specific class that is substantially equivalent to the desired building having factors other than the desired input total floor area to a weighed average value of square-meter costs for a building having all of the aforementioned factors.

A data estimating system for estimating a construction cost of a desired building having desired factors including a desired total floor area by statistically processing building construction cost data of a plurality of buildings determined from factors including the total floor area, said system comprising:

• memory means for storing building construction cost data of the plurality of buildings;
• classifying means for classifying the building construction cost data stored in said memory means by classifying according to total floor area of each building and by classifying according to other factors using predetermined grades;
• first input means for inputting desired factors including a desired total floor area;
• second input means for inputting factors, other than the desired total floor area, to be complexed among the desired factors;
• and
• calculating means for estimating the construction cost of the desired building having desired factors including the desired total floor area on the basis of a ratio of weighed average value of square-meter costs for a building of a specific class equivalent to the input desired total floor area and a weighed average value of square-meter costs for a building of a specific class equivalent to complexed factors other than the input total floor area, to a weighed average value of square-meter costs for all of the plurality of buildings.

A data estimating system for estimating a data value corresponding to desired factors by statistically processing a plurality of data having values determined from a plurality of factors, said system comprising:

• memory means for storing a plurality of data;
• classifying means for classifying said data stored in said memory means into each class by discriminating said plurality of factors as basic factors and environmental factors, and further said data using predetermined grades;
• weighed average value calculating means for calculating a weighed average value of data of the basic factors in each class, a weighed average value of data of the environmental factors in each class, and a weighed average value of all of said data;
• input means for inputting desired basic factors and desired environmental factors;
• and
• calculating means for estimating the data value corresponding to desired factors on the basis of a ratio of a weighed average value of a specific class equivalent to the desired environmental factor and a weighed average value of a specific class equivalent to the desired basic factor to a weighed average value of all of said data.

A data estimating system for estimating a construction cost of a desired building having desired factors including a desired total floor area by statistically processing construction costs of a plurality of buildings determined from factors including total floor area, said system comprising:

• memory means for storing construction cost data of the plurality of buildings;
• classifying means for classifying the building construction cost data stored in said memory means by classifying according to total floor area and other factors and further classifying according to predetermined grades;
• input means for inputting desired factors including a desired total floor area;
• and
• calculating means for estimating the construction cost of the desired building on the basis of a ratio of a weighed average value of square-meter costs for the buildings of a specific class equivalent to factors other than the input total floor area and a weighed average value of square-meter costs for the buildings of a specific class equivalent to the input desired total floor area to a weighed average value of square-meter costs for all buildings.

A data estimating system for estimating a construction cost of a desired building having desired factors including a desired total floor area by statistically processing building construction cost data of a plurality of buildings determined from factors including the total floor area, said system comprising:

• memory means for storing building construction cost data of the plurality of buildings;
• classifying means for classifying the building construction cost data stored in said memory means by classifying according to total floor area and other data and further classifying according to predetermined grades;
• first input means for inputting desired factors including the desired total floor area;
• second input means for inputting factors to be complexed among the desired factors other than the desired total floor area;
• and
• calculating means for estimating the construction cost of the desired building on the basis of a ratio of a weighed average value of square-meter costs for buildings of a specific class equivalent to complex factors other than the input total floor area and a weighed average value of square-meter costs for buildings of a specific class equivalent to a input desired total floor area to a weighed average value of square-meter costs for all buildings.

A computerized system for estimating a construction cost of a desired building from a construction cost database mother group containing construction costs for a variety of buildings, comprising:

• a basic yardstick classifying means for classifying the mother group into distinct basic classes according to the basic yardstick and further classifying each distinct basic class into predetermined grades;
• an environmental yardstick classifying means for classifying the mother group into distinct environmental classes according to an environmental yardstick and further classifying each distinct environmental class into predetermined grades;
• a weighed average calculating means for calculating a weighed average of construction cost per unit area of data contained in each of the classes and grades of the mother group classified by the basic yardstick classifying means and the environmental classifying means;
• input means for inputting a basic yardstick datum for the desired building and an environmental yardstick datum for the desired building;
• construction cost estimating means for estimating the construction cost of the desired building based on the weighed average of construction cost per unit area of the data contained in each of the classes and grades and the basic yardstick datum for the desired building;
• and
• cost estimation refining means for refining the construction cost estimate based on the environmental yardstick datum for the desired building.

A computer implemented method for estimating a construction cost of a desired building from a construction cost database mother group containing construction costs for a variety of buildings, comprising the steps of:

• a basic yardstick classifying step for classifying the mother group into distinct basic classes according to the basic yardstick and further classifying each distinct basic class into predetermined grades;
• an environmental yardstick classifying step for classifying the mother group into distinct environmental classes according to an environmental yardstick and further classifying each distinct environmental class into predetermined grades;
• a weighed average calculating step for calculating a weighed average of construction cost per unit area of data contained in each of the classes and grades of the mother group classified by the basic yardstick classifying step and the environmental classifying step;
• inputting a basic yardstick datum for the desired building and an environmental yardstick datum for the desired building;
• estimating the construction cost of the desired building based on the weighed average of construction cost per unit area of the data contained in each of the classes and grades and the basic yardstick datum for the desired building;
• and
• refining the construction cost estimate based on the environmental yardstick datum for the desired building.