## 4 Discussion
### Data Collection for, and Analysis and Discussion of Research Question 3 (Rq 3)
The simulation results were collected and put into MS Project, and scheduling calculations were performed. Again, multiple schedule estimates were conducted, using the number of additional days attributable to residual risk (post-risk mitigation), alongside the project's initial length and simulation findings, to derive an estimate for the completion time of the Railway Station Phase II, as presented in Table 6.  
The inherent risks are further discussed and analyzed with respective respondents (experts). Using cause-effect analysis and further preventive, as well as corrective, measures, the following risk response strategies are proposed as shown in Table 6. Referring to Table 6, showing a duration and project completion time comparison based on the Station Phase II Project Implementation Schedule Model under residual risk conditions (post-risk mitigation), the initial completion length is 674.00 days. Using PERT conditions, the value includes an additional period of 1319.82 days or 95.82% of the original timeframe. Under theoretical value conditions (confidence level 80%), there is an additional length of 1342.26 days or 99.15% of the initial timeframe. Under theoretical value conditions (confidence level 90%), there is an additional length of 1345.10 days or 99.57% of the starting period. Under theoretical value conditions (confidence level 95%), there is an additional length of 1363.02 days, equating to 102.23% of the initial period. In the simulation value condition (confidence level 80%), there is an additional length of 1342.26 days, representing 99.15% of the initial timeframe. In the simulation value condition (confidence level 90%), there is an additional period of 1345.10 days or 135.13% of the initial timeframe. In the simulation value condition (confidence level 95%), there is an additional duration of 1592.33 days or 99.57% of the initial timeframe. The findings of additional time from all scheduling models under the residual risk condition (post-risk mitigation) range from 95.82% to 102.23%. The risk responses are suggested and validated by the experts in the form of preventive and corrective actions. Table 7 shows how the respective risks are responded using risk response strategies as defined by the [17]. \begin{table}
\begin{tabular}{l l r r r} \hline \hline \multicolumn{1}{c}{**No.**} & \multicolumn{1}{c}{**Schedule Model**} & \multicolumn{1}{c}{**Duration (in Days) 1**} & \multicolumn{1}{c}{\
\begin{tabular}{c} **Completion Time** \\ **(Post-Risk Mitigation)** \\ \end{tabular} } & \multicolumn{1}{c}{
\begin{tabular}{c} **Comparison with** \\ **Initial Duration (\%)** \\ \end{tabular} } \\ \hline
1 & Initial contract & 674.00 days & 30 September 2021 & - \\ \hline
2 & PERT value & 1319.82 days & 24 August 2023 & 95.82\% \\ \hline
3 & Theoretical value (confidence level 80\%) & 1342.26 days & 16 September 2023 & 99.15\% \\ \hline
4 & Theoretical value (confidence level 90\%) & 1345.10 days & 28 September 2023 & 99.57\% \\ \hline
5 & Theoretical value (confidence level 95\%) & 1363.02 days & 7 October 2023 & 102.23\% \\ \hline
6 & Simulation value (confidence level 80\%) & 1342.26 days & 16 September 2023 & 99.15\% \\ \hline
7 & Simulation value (confidence level 90\%) & 1354.10 days & 28 September 2023 & 100.91\% \\ \hline
8 & Simulation value (confidence level 95\%) & 1363.02 days & 7 October 2023 & 102.23\% \\ \hline \hline \end{tabular} Source: Author’s research. 1 The total duration is calculated using MS Project by entering the number of related activities identified in Table 4.  
\end{table} 
Table 6: Comparison of duration and project completion time based on the Railway Station Phase II Project Implementation Schedule Model under residual risk conditions (post-risk mitigation).