# Simulating the Software Development Lifecycle: The Waterfall Model
## 4 Results
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline  & \multicolumn{2}{c}{**Small**} & \multicolumn{2}{c}{**Medium**} & \multicolumn{2}{c}{**Large**} & \multicolumn{2}{c}{**All Sizes**} \\ \hline  & \multicolumn{2}{c}{Scenario} & \multicolumn{2}{c}{Scenario} & \multicolumn{2}{c}{Scenario} & \multicolumn{2}{c}{Scenario} \\  & 1 & 2 & 1 & 2 & 1 & 2 & 1 & 2 \\ \hline Min & 32.000 & 34.000 & 41.000 & 36.000 & 39.000 & 33.000 & 32.000 & 33.000 \\ Max & 107.141 & 106.000 & 170.142 & 112.000 & 303.000 & 168.000 & 303.000 & 168.000 \\ Mean & 49.995 & 47.298 & 81.944 & 59.950 & 119.643 & 80.827 & 75.222 & 57.540 \\ Std. Dev. & 17.964 & 15.729 & 38.671 & 25.372 & 65.704 & 40.559 & 47.682 & 28.576 \\ \hline \end{tabular} Note: Units for completion times represent simulated units of time.  
\end{table} 
Table 9: Summary of minimum (Min), maximum (Max), mean, and standard deviation (Std. Dev.) of completion times for projects by size of project for both Scenarios 1 and 2.  
for medium-sized projects, it was 19.368 percent for Scenario 1 and 17.949 percent for Scenario 2; and lastly, for large projects, the rates were 26.891 percent for Scenario 1 and 24.215 percent for Scenario 2. Overall, the failure rate for Scenario 1 was 16.844 percent, and for Scenario 2, it was 15.084 percent. These data, which detail the number of times a phase failed by project size, are presented in greater detail in Table 11. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Phase** & & **Small** & \multicolumn{2}{c}{**Medium**} & \multicolumn{2}{c}{**Large**} & \multicolumn{2}{c}{**All Sizes**} \\ \hline  & & \multicolumn{3}{c}{Scenario} & \multicolumn{3}{c}{Scenario} & \multicolumn{3}{c}{Scenario} \\  & & 1 & 2 & 1 & 2 & 1 & 2 & 1 & 2 \\ \hline \multirow{4}{*}{Analysis} & Min & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 \\  & Max & 5.500 & 5.000 & 6.979 & 5.000 & 8.189 & 5.000 & 8.189 & 5.000 \\  & Mean & 3.890 & 4.095 & 4.093 & 4.083 & 4.313 & 3.975 & 4.083 & 4.058 \\  & Std. Dev. & 0.710 & 0.640 & 0.866 & 0.732 & 1.376 & 0.620 & 1.008 & 0.657 \\ \hline \multirow{4}{*}{Design} & Min & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 \\  & Max & 15.541 & 10.000 & 15.000 & 10.000 & 18.059 & 10.000 & 18.059 & 10.000 \\  & Mean & 7.858 & 7.671 & 8.200 & 7.357 & 8.674 & 7.560 & 8.255 & 7.558 \\  & Std. Dev. & 2.328 & 1.501 & 1.936 & 1.620 & 2.727 & 1.527 & 2.359 & 1.536 \\ \hline \multirow{4}{*}{Implementation} & Min & 15.000 & 15.000 & 15.000 & 15.000 & 15.000 & 15.000 & 15.000 & 15.000 \\  & Max & 61.000 & 20.000 & 48.000 & 19.000 & 62.396 & 20.000 & 62.396 & 20.000 \\  & Mean & 22.398 & 17.458 & 24.668 & 17.207 & 27.125 & 17.760 & 24.730 & 17.510 \\  & Std. Dev. & 9.519 & 1.383 & 9.873 & 1.373 & 11.429 & 1.546 & 10.419 & 1.442 \\ \hline \multirow{4}{*}{Testing} & Min & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 & 5.000 \\  & Max & 10.000 & 10.000 & 10.000 & 10.000 & 16.000 & 10.000 & 16.000 & 10.000 \\  & Mean & 7.278 & 7.433 & 7.540 & 7.500 & 7.980 & 7.320 & 7.588 & 7.406 \\  & Std. Dev. & 1.406 & 1.373 & 1.541 & 1.703 & 2.537 & 1.596 & 1.890 & 1.507 \\ \hline \multirow{4}{*}{Maintenance} & Min & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 \\  & Max & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 & 3.000 \\  & Mean & 2.120 & 1.984 & 1.929 & 2.130 & 1.857 & 2.061 & 1.984 & 2.034 \\  & Std. Dev. & 0.594 & 0.713 & 0.745 & 0.626 & 0.648 & 0.659 & 0.667 & 0.679 \\ \hline \multirow{4}{*}{Across all phases} & Min & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 \\  & Max & 61.000 & 20.000 & 3.000 & 19.000 & 62.396 & 20.000 & 62.396 & 20.000 \\ \cline{1-1}  & Mean & 8.934 & 8.000 & 10.041 & 7.686 & 11.059 & 8.336 & 9.976 & 8.036 \\ \cline{1-1}  & Std. Dev. & 8.539 & 5.497 & 9.523 & 5.125 & 10.804 & 5.602 & 9.654 & 5.449 \\ \hline \hline \end{tabular} Note: Units for completion times represent simulated units of time.  
\end{table}