# An Expert Knowledge-Based System to Evaluate the Efficiency of Dry Construction Methods
## 2 Materials and Method
Other data (lengths of individual technological breaks with automated recalculation of cost, total labor, and weight) are generated automatically. Once the complex COMBINATOR was developed, through a set of simulations with the help of the COMBINATOR, we measured the effects of different combinations of construction \begin{table}
\begin{tabular}{l l l l l l l} \hline \hline \multirow{2}{*}{**Model**} & \multicolumn{3}{c}{**Combinations of Finishing Works Systems and Techniques**} & \multicolumn{1}{c}{\multirow{2}{*}{**Sequence of Works in Implementation**}} \\ \cline{2-2} \cline{4-6}  & \multirow{2}{*}{**Partitions**} & \multicolumn{1}{c}{**Ceilings**} & \multicolumn{1}{c}{
\begin{tabular}{c} **Plasters** \\ **(Wall Finishes)** \\ \end{tabular} } & \multicolumn{1}{c}{\multirow{2}{*}{**Flors**}} & \multicolumn{1}{c}{\multirow{2}{*}{**Sequence of Works in Implementation**} \\ \cline{2-2} \cline{4-6}  & & & & & & \\ \hline M1 & WMP & CP & WP & WF & P\({}_{\text{W}}\) & WMP-TB-CP-TB-WP-TB-WF-TB \\ \hline M2 & DP & SC & DL & DS & P\({}_{\text{D}}\) & DP-TB-DL-TB-SC-TB-DS-TB \\ \hline \multirow{6}{*}{M3} & WMP & CP & WP & DS & P\({}_{\text{1}}\) & WMP-TB-CP-TB-WP-TB-DS-TB \\  & WMP & CP & DL & WF & P\({}_{\text{2}}\) & WMP-TB-CP-TB-WF-TB-DL-TB \\  & WMP & SC & WP & WF & P\({}_{\text{3}}\) & WMP-TB-WP-TB-WF-TB-SC-TB \\  & DP & CP & WP & WF & P\({}_{\text{4}}\) & CP-TB-WP-TB-WF-TB-DP-TB \\  & WMP & CP & DL & DS & P\({}_{\text{5}}\) & WMP-TB-CP-TB-DL-TB-DS-TB \\  & WMP & SC & WP & DS & P\({}_{\text{6}}\) & WMP-TB-SC-TB-DS-TB \\  & DP & CP & WP & DS & P\({}_{\text{7}}\) & CP-TB-WP-TB-DP-TB-DS-TB \\  & WMP & SC & DL & WF & P\({}_{\text{8}}\) & WMP-TB-WF-TB-DL-TB-SC-TB \\  & DP & SC & WP & WF & P\({}_{\text{9}}\) & WP-TB-WF-TB-DP-TB-SC-TB \\  & DP & CP & DL & WF & P\({}_{\text{10}}\) & CP-TB-WF-TB-DP-TB-DL-TB \\  & WMP & SC & DL & DS & P\({}_{\text{11}}\) & WMP-TB-DL-TB-SC-TB-DS-TB \\  & DP & SC & DL & WF & P\({}_{\text{12}}\) & WF-TB-DP-TB-DL-TB-SC-TB \\  & DP & SC & WP & DS & P\({}_{\text{13}}\) & WP-TB-DP-TB-SC-TB-DS-TB \\  & DP & CP & DL & DS & P\({}_{\text{14}}\) & CP-TB-DP-TB-DL-TB-DS-TB \\ \hline \hline \end{tabular}
\end{table} 
Table 4: The technological models of finishing works. \begin{table}
\begin{tabular}{l l l l} \hline \hline \multicolumn{1}{c}{**Type of Finishing Work**} & \multicolumn{1}{c}{**Number**} & \multicolumn{1}{c}{**Type of Finishing Work**} & \multicolumn{1}{c}{**Number**} \\ \hline Wet masonry partition (WMP) & 107 & Drywall partition (DP) & 315 \\ Ceiling plaster (CP) & 248 & Suspended ceiling (SC) & 140 \\ Wall plaster (WP) & 236 & Dry lining (DL) & 103 \\ Wet floor (WF) & 207 & Dry screed (DS) & 62 \\ \hline Total & 798 & Total & 620 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: The number of systems and techniques of finishing works in the knowledge base. systems and techniques on the implementation of finishing works in terms of construction time and construction cost. The effects in terms of cost and time were examined separately for: (i) combinations of only wet construction systems and techniques--technological model M1, (ii) combinations of only dry systems and techniques--technological model M2, and (iii) various combinations of wet and dry construction systems and techniques--technological model M3. The simulations were performed on the basis of quantities of partitions, ceilings, floors, and wall finishes in several reference buildings. The results of the simulations presented above represent useful data for the next analysis of the potential of dry construction systems and techniques for finishing works from several points of view, in terms of the construction time, in terms of costs, or in terms of the weight of the structures of partitions, wall finishes, floors, and ceilings. The analysis was made based on the data that resulted from all simulations of the finishing works in the reference buildings. Selected results of the analysis, exactly based on the data of the reference family house FH 70, are presented in Section 3.3.