# Improved Safety Analysis Integration in a Systems Engineering Approach
## 6 Case Study
### Step 2: Making Architecture Decision Using FMEA Recommendations
\begin{table}
\begin{tabular}{l l l l l l l l l l} \hline \hline
**Component** & **Function** & **Function Failure Mode** & **Failure Mode** & **S** & **O** & **D** & **RFN** & **Risk Class** \\ \hline EMCU & Regulate & Electrical Energy & Fails to perform & Hardware defect & 8 & 4 & 4 & 128 & III \\ \hline  & & perform incorrectly & Hardware defect & 6 & 4 & 4 & 96 & III \\ \hline  & Translate & Fails to perform & Software Error & 8 & 1 & 6 & 48 & IV \\  & Pilot Instructions & & Hardware defect & 9 & 2 & 7 & 126 & III \\ \hline  & & Synchronization Error & 10 & 2 & 6 & 120 & III \\ \hline  & & Memory defect & 7 & 1 & 5 & 35 & IV \\ \hline  & & Performs incorrectly & Software fault & 6 & 2 & 4 & 48 & III \\ \hline  & & Performs incorrectly & Synchronization Error & 5 & 3 & 6 & 90 & III \\ \hline Switch EMCU & Transmit & \multirow{2}{*}{Fails to perform} & Hardware defect & 9 & 2 & 5 & 90 & III \\  & Electric Energy & & Fails to perform & Hardware defect & 7 & 3 & 5 & 105 & III \\ \hline  & Switch-over & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Loss of structural integrity} & \multirow{2}{*}{10} & \multirow{2}{*}{3} & \multirow{2}{*}{4} & \multirow{2}{*}{120} & \multirow{2}{*}{II} \\  & the Electric Energy & & & & & & & \\ \hline Geared Motor & Adapt & \multirow{2}{*}{Meshanical Energy} & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{2} & \multirow{2}{*}{9} & \multirow{2}{*}{2} & \multirow{2}{*}{8} & \multirow{2}{*}{144} & \multirow{2}{*}{III} \\  & & Mechanical Energy & & & & & & & \\ \hline  & & Fails to perform & Jamming & 9 & 2 & 8 & 144 & III \\ \hline  & & perform incorrectly & Poor efficiency & 2 & 4 & 3 & 24 & IV \\ \hline  & Measure Incidence & Fails to perform & Mechanical drive defect & 7 & 2 & 5 & 70 & III \\ \hline  & & Power Loss & 7 & 4 & 3 & 84 & III \\ \hline  & & Internal component failure & 6 & 3 & 8 & 144 & III \\ \hline  & & Perform incorrectly & Mechanical drive defect & 5 & 4 & 6 & 120 & III \\ \hline  & & Low or high voltage & 5 & 2 & 7 & 70 & IV \\ \hline  & & Measure fault & 4 & 4 & 5 & 80 & III \\ \hline  & Transform & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Jamming} & \multirow{2}{*}{6} & \multirow{2}{*}{4} & \multirow{2}{*}{8} & \multirow{2}{*}{192} & \multirow{2}{*}{III} \\  & Mechanical Energy & & & & & & & \\ \hline  & & Loss of structural integrity & 10 & 2 & 5 & 100 & III \\ \hline  & & Short-circuit & between & \multirow{2}{*}{8} & \multirow{2}{*}{3} & \multirow{2}{*}{4} & \multirow{2}{*}{96} & \multirow{2}{*}{III} \\  & & two winding & & & & & & \\ \hline  & & Perform incorrectly & Short-circuit in one winding & 7 & 2 & 6 & 84 & III \\ \hline Switch Motor & Transmit & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Hardware defect} & \multirow{2}{*}{9} & \multirow{2}{*}{2} & \multirow{2}{*}{5} & \multirow{2}{*}{90} & \multirow{2}{*}{III} \\  & Electric Energy & & & & & & & \\ \hline  & Switch-over & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Hardware defect} & \multirow{2}{*}{7} & \multirow{2}{*}{3} & \multirow{2}{*}{5} & \multirow{2}{*}{105} & \multirow{2}{*}{III} \\  & the Electric Energy & & & & & & & \\ \hline Mechanical & Transmit & \multirow{2}{*}{Fails to perform} & \multirow{2}{*}{Loss of structural integrity} & \multirow{2}{*}{9} & \multirow{2}{*}{3} & \multirow{2}{*}{5} & \multirow{2}{*}{135} & \multirow{2}{*}{III} \\ Transmission & Mechanical Energy & & & & & & & \\ \hline  & & Jamming & 6 & 5 & 3 & 90 & III \\ \hline  & & Perform incorrectly & Poor efficiency & 5 & 6 & 5 & 150 & III \\ \hline \hline \end{tabular}
\end{table} 
Table 3: New FMEA for EMA. Figure 6: Updated structure of the system.