ANN Based Approach for Estimation of Construction Costs of Sports Fields

Table 1

Characteristics of dependent variables and independent variables considered initially to be used in the course of a regression analysis (source: own study).

Description of the variable	Variable type	Values
Total cost of construction works	Quantitative	Cost given in thousands of PLN
Playing area of the sports field	Quantitative	Surface area measured in m^2
Location of the facility	Quantitative	Urban area (big cities, medium cities, small cities) or outside the urban area (villages)
Number of sport functions	Quantitative	Number of sports that can be played in the field
Type of the playing field surface	Categorical	Natural or artificial grass
Quality standard of the playing field’s surface	Categorical	Quality standard assessed according to the available information in the tender documentation
Ball stop net’s surface	Quantitative	Surface area measured in m^2
Arranged area for communication	Quantitative	Surface area measured in m^2
Fencing length	Quantitative	Length measured in m
Arranged green area	Quantitative	Surface area measured in m^2