FHA: Functional Hazard Assessment & SSA: System Safety Assessment
“FHA & SSA are top-down analytical methods which fully explore all possible failure condition for compound systems.”
PROJECT: AIRCRAFT NAVIGATION SYSTEM FHA & SSA
The customer requested a complete FHA and SSA analysis of the navigation system.
FHA is a top-down process which examines system functions to identify all potential failure conditions and classifies the associated hazards. The FHA is performed early in the development, but is updated as new functions or failure conditions are identified.
Once the FHA is completed, the SSA associates a probability to each failure condition. The result of the SSA must comply with the standard requirements set by reference rules.
In this case, a new component was added to the system, so the FHA was updated resulting in design modifications.
Customer profile: Medium sized aicraft manufacturer
Product: Military trainer and private jet navigation system
Development period: Year 2014
Skills: Mechanical engineering, safety