FHA Table Reference

The FHA table represents the functional breakdown and its failure information in four nested levels.

Level	Meaning	Ownership or relationship
Functional	Functions from the functional breakdown, listed recursively.	A function can have one or more failure conditions.
Failure Condition	A failure condition associated with a function.	One failure condition can affect more than one function.
Failure Condition Feature	The failure condition during a particular flight phase.	Owned exclusively by one failure condition.
Failure Condition Effect	The effect during that phase on an entity such as the system, occupants, or crew.	Owned by one failure-condition feature.

The documented workflow edits the following data directly in the table:

• label;
• name;
• failure type;
• phase of flight;
• effect and affected entity;
• severity;
• assumptions;
• safety studies.

See Build an FHA for the editing procedure.