What is the primary importance of including failure causes in a FMEA?

• A. They are completely researched and justified
• B. They are carefully reviewed for all lines in the FMEA
• C. They are left blank until proof is obtained
• D. They are left blank unless the failure mode is critical

Answer: (D)

Including failure causes in a Failure Modes and Effects Analysis (FMEA) is crucial for understanding the potential risks associated with a system. The primary importance lies in identifying the root causes of failures, as this information allows teams to develop effective mitigation strategies and improve designs. By focusing on failure causes, one can prioritize which failure modes need immediate attention based on their severity or likelihood of occurrence, which fosters a more informed approach to safety management.

The rationale behind leaving failure causes blank unless the failure mode is deemed critical reflects a risk management strategy. In many cases, not every failure mode will warrant a detailed investigation into its causes, especially if the impact of that failure is minor or doesn't significantly affect safety or system performance. Hence, efforts can be better concentrated on failure modes that pose the greatest risk, streamlining the FMEA process while ensuring that critical areas are addressed thoroughly. This approach aids in resource allocation and helps prevent over-analysis of less significant issues, facilitating a more efficient safety assessment process.