6Implementation

6.1Example facility

For the statistical investigation of operating costs of real estate, a data sample of 253 operated facilities is analysed. Based on the data, multiple statistical models are developed and validated. The models intend to reveal the causal interrelationships between operating costs and various candidate predictor variables. Furthermore, the models aim to give an accurate estimation of operating costs. Therefore, linear and non-linear regression models, artificial neural network models, and binary classification tree models are stepwise developed. Furthermore, median values of categorised cost indicators for the purpose of cost estimation are introduced for all analysed cost groups of the standard DIN 18960:2008-02. ...

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