## 3 Results
### Case Study
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & \multicolumn{2}{c}{**Notes (Number/Details)**} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{**Units \(i=\)**} & & & \\ \cline{3-10}  & \multicolumn{2}{c}{**1**} & \multicolumn{2}{c}{**2**} & \multicolumn{2}{c}{**3**} & \multicolumn{2}{c}{**4**} & \multicolumn{2}{c}{**5**} & \multicolumn{2}{c}{**6**} & \multicolumn{2}{c}{**7**} \\ \hline \multicolumn{10}{c}{Eurthworks (\(j=1\))} \\ \hline \multirow{3}{*}{1} & Execution time [working days] & 11 & 9 & 7 & 17 & 8 & 9 & 8 \\  & Execution cost [in thous. EUR] & 5.5 & 4.5 & 3.5 & 8.5 & 4 & 4.5 & 4 \\ \hline \multirow{3}{*}{2} & Execution time [working days] & 10 & 7 & 8 & 18 & 9 & 11 & 9 \\  & Execution cost [in thous. EUR] & 6.05 & 5.79 & 3.06 & 8.03 & 3.56 & 3.68 & 3.56 \\ \hline \multirow{3}{*}{3} & Execution time [working days] & 12 & 10 & 6 & 13 & 10 & 10 & 9 \\  & Execution cost [in thous. EUR] & 5.04 & 4.05 & 4.08 & 11.12 & 3.20 & 4.05 & 3.56 \\ \hline \multicolumn{10}{c}{Foundations (\(j=2\))} \\ \hline \multirow{3}{*}{1} & Execution time [working days] & 17 & 11 & 25 & 24 & 17 & 14 & 26 \\  & Execution cost [in thous. EUR] & 24.00 & 15.53 & 35.29 & 33.88 & 24.00 & 19.76 & 36.71 \\ \hline \multirow{3}{*}{2} & Execution time [working days] & 14 & 10 & 27 & 26 & 14 & 16 & 24 \\  & Execution cost [in thous. EUR] & 29.14 & 17.08 & 32.68 & 31.28 & 29.14 & 17.29 & 39.76 \\ \hline \multirow{3}{*}{3} & Execution time [working days] & 22 & 8 & 28 & 25 & 14 & 17 & 28 \\  & Execution cost [in thous. EUR] & 18.55 & 21.35 & 31.51 & 32.53 & 29.14 & 16.28 & 34.08 \\ \hline \multicolumn{10}{c}{Walls. slabs (\(j=3\))} \\ \hline \multirow{3}{*}{1} & Execution time [working days] & 35 & 13 & 45 & 44 & 35 & 36 & 52 \\  & Execution cost [in thous. EUR] & 65.50 & 24.33 & 84.21 & 82.34 & 65.50 & 67.37 & 97.31 \\ \hline \multirow{3}{*}{2} & Execution time [working days] & 31 & 13 & 35 & 54 & 42 & 30 & 67 \\  & Execution cost [in thous. EUR] & 73.95 & 24.33 & 108.28 & 67.09 & 54.58 & 80.85 & 75.53 \\ \hline \multirow{3}{*}{3} & Execution time [working days] & 34 & 13 & 56 & 42 & 30 & 37 & 36 \\  & Execution cost [in thous. EUR] & 67.43 & 24.33 & 67.67 & 86.26 & 76.42 & 65.55 & 140.57 \\ \hline \multicolumn{10}{c}{Rafter framings, roofing (\(j=4\))} \\ \hline \multirow{3}{*}{1} & Execution time [working days] & 12 & 10 & 17 & 12 & 11 & 19 & 10 \\  & Execution cost [in thous. EUR] & 35.50 & 29.58 & 50.29 & 35.50 & 32.54 & 56.21 & 29.58 \\ \hline \multirow{3}{*}{2} & Execution time [working days] & 13 & 8 & 21 & 12 & 11 & 18 & 11 \\  & Execution cost [in thous. EUR] & 32.77 & 36.98 & 40.71 & 35.50 & 32.54 & 59.33 & 26.89 \\ \hline \multirow{3}{*}{3} & Execution time [working days] & 11 & 7 & 14 & 14 & 12 & 14 & 10 \\  & Execution cost [in thous. EUR] & 38.73 & 42.26 & 61.07 & 30.43 & 29.83 & 76.28 & 29.58 \\ \hline \multicolumn{10}{c}{Windows and doors (\(j=5\))} \\ \hline \multirow{3}{*}{1} & Execution time [working days] & 9 & 9 & 4 & 14 & 17 & 7 & 14 \\  & Execution cost [in thous. EUR] & 38.00 & 38.00 & 16.89 & 59.11 & 71.78 & 29.56 & 59.11 \\ \hline \multirow{3}{*}{2} & Execution time [working days] & 8 & 10 & 4 & 16 & 19 & 7 & 13 \\  & Execution cost [in thous. EUR] & 42.75 & 34.20 & 16.89 & 51.72 & 64.22 & 29.56 & 63.66 \\ \hline \multirow{3}{*}{3} & Execution time [working days] & 10 & 7 & 3 & 16 & 16 & 9 & 16 \\  & Execution cost [in thous. EUR] & 34.20 & 48.86 & 22.52 & 51.72 & 76.26 & 22.99 & 51.72 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The duration of the activities and their cost according to the mode for \(n=7\) units of a construction project. In order to prepare a case study, data for a single residential building were used. Authors determined the duration of activities and their cost on the basis of labor intensity catalogs for construction and unit prices of works. Data for the remaining buildings were randomly generated using a uniform distribution ranging from \(-30\%\) to \(+30\%\).