3.5. FMEA Procedure
The process for conducting FMEA can be divided into following steps. These steps are briefly explained as follows.
Step 1 Collect the functions of system and build a hierarchical structure. Divide the system into several subsystems, having number of components.
Step 2 Determine the failure modes of each component and its effects. Assign the severity rating (S) of each failure mode according to the respective effects on the system.
Step 3 Determine the causes of failure modes and estimate the likelihood of each failure occurring. Assign the occurrence rating (O) of each failure mode according to its likelihood of occurrence.
Step 4 List the approaches to detect the failures and evaluate the ability of system to detect the failures prior to the failures occurring. Assign the detection rating (D) of each failure mode.
Step 5 Calculate the risk priority number (RPN) and establish the priorities for attention.
Step 6 Take recommended actions to enhance the performance of system.
Step 7 Conduct FMEA report in a tabular form.