Step 1: Define the process or function
The first stage identifies each process, part, or system to establish the intended function and the interrelationship between different subsystems or components.
Step 2: Brainstorm potential failure modes
The information gathered in step one is used to determine how the system or design could potentially fail. While failure modes can be part-specific, failures in one subsystem or component can affect and cause additional effects in other interconnected systems. That is why it is critical to create the asset hierarchy in step one and uncover all failure modes in step two.
Step 3: Identify each failure effect
Failure effects must be identified and listed for each failure mode. What are the environmental or safety consequences for a particular failure? Keep in mind a single failure mode can produce multiple failure effects.
Step 4: Assign severity rankings
Next, failures are ranked based on the severity of the consequences. Failure impacts are ranked on a one through ten scale, with one being little to no effect and ten representing severe risk.