## 2 Methods and Models
### The Processing of Collected Data  
The data collected in the knowledge base describes individual construction projects, each with unique durations and implementation costs. To facilitate comparative analysis, the data were normalized in stage 3. This involved processing and standardizing the collected data.  
Each project varies in duration and implementation cost. Therefore, to enable meaningful comparison across different construction projects, the collected data needed to be processed accordingly. For each analyzed construction project, processed data were determined based on the primary data (a fragment of the data presented in Table 5). The processed data (a fragment of the data is presented in Table 6) was derived for this purpose. Normalization consisted in determining the unitary value of cost and time for each individual examined period, assuming that for each construction project, regardless of the number of settlement periods, the total planned duration is 1.0 and the total planned budget is 1.0.  
Tables 5 and 6 present a fragment of the knowledge base.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Investment**} & \multirow{2}{*}{**Group**} & \multicolumn{2}{c}{**Number of**} & \multirow{2}{*}{**BCWS.1**} & \multirow{2}{*}{**BCWS.2**} & \multirow{2}{*}{**BCWS.3**} & \multirow{2}{*}{**BCWS.4**} & \multirow{2}{*}{\(\ldots\)} \\  & & **Measurements** & & & & & \\ \hline _A.1_ & 1 & 16 & 1,025,000.00 & 2,125,000.00 & 3,255,000.00 & 4,705,000.00 & \(\ldots\) \\ _A.2_ & 1 & 16 & 315,000.00 & 800,000.00 & 1,613,891.00 & 2,440,787.00 & \(\ldots\) \\ _A.3_ & 1 & 16 & 168,600.00 & 1,143,500.00 & 2,038,395.00 & 2,868,920.00 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _B.1_ & 2 & 30 & 743,145.00 & 2,086,106.00 & 4,048,603.00 & 5,835,332.00 & \(\ldots\) \\ _B.2_ & 2 & 27 & 2,414,590.00 & 1,096,788.00 & 1,797,060.00 & 2,649,172.00 & \(\ldots\) \\ _B.3_ & 2 & 23 & 72,998.00 & 90,196.79 & 863,427.28 & 2,409,888.26 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _C.1_ & 3 & 34 & 500,000.00 & 2,719,466.57 & 8,735,718.00 & 17,585,116.49 & \(\ldots\) \\ C.2 & 3 & 17 & 480,000.00 & 1,220,000.00 & 2,570,000.00 & 3,970,000.00 & \(\ldots\) \\ C.3 & 3 & 16 & 143,886.00 & 388,386.00 & 613,386.00 & 859,386.00 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _D.1_ & 4 & 15 & 10,415,764.00 & 22,589,476.00 & 35,372,128.00 & 49,014,882.00 & \(\ldots\) \\ _D.2_ & 4 & 13 & 500,000.00 & 2,719,466.57 & 8,735,718.00 & 17,585,116.49 & \(\ldots\) \\ _D.3_ & 4 & 11 & 125,000.00 & 325,000.00 & 1,325,000.00 & 2,055,128.21 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _E.1_ & 5 & 8 & 129,805.00 & 714,083.00 & 1,609,364.00 & 2,595,410.00 & \(\ldots\) \\ E.2 & 5 & 8 & 694,983.00 & 1,996,676.00 & 3,504,169.00 & 5,663,252.00 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _F.1_ & 6 & 13 & 102,667.00 & 323,221.00 & 743,880.00 & 1,530,622.00 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ G.1_ & 7 & 25 & 2,010,000.00 & 3,265,000.00 & 5,253,612.00 & 10,480,173.00 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ H.1_ & 8 & 10 & 176,168.75 & 371,994.10 & 656,962.85 & 1,193,466.25 & \(\ldots\) \\ _\(\ldots\)_ & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ _I.1_ & 9 & 26 & 3,923,924.31 & 6,801,636.71 & 8,738,049.69 & 13,611,138.49 & \(\ldots\) \\ \hline \hline \end{tabular}
\end{table}
Table 5: Primary data—a fragment of the knowledge base.