Implementation of Process-Based and Data-Driven Models for Early Prediction of Construction Time

Table 3

Minimal, maximal, mean value, and standard deviation of input numerical variables for the BTC-GRNN model.

Variable	Rows	Minimum	Maximum	Mean	Standard deviation
ln(planned costs, euro)	116	9.05358	18.36511	13.27770	2.06661
ln(real costs, euro)	116	9.09459	18.51599	13.35837	2.11371
ln(planned time, days)	116	2.70805	6.81619	5.07076	1.04090
ln(real time, days)	116	2.70805	7.50934	5.14528	1.06395