There are five D0/178B CRITICALITY levels, with DO-178B Level A being most critical and DO-178B Level E being least critical. The DO-178B criticality level is based UPON the contribution of the associated software to potential failure conditions. DO-178B failure conditions are determined by the FAA system safety assessment process. Each avionics system has one defined criticality level (and must be approved by the FAA); HOWEVER different components within that system can have DIFFERING criticality levels subject to certain guidelines. The higher the DO-178B criticality level, the GREATER the amount of software development effort required. Our DO-178B Training provides additional details on DO-178B criticality levels and how to determine, apply and optimize.

There are five D0/178B criticality levels, with DO-178B Level A being most critical and DO-178B Level E being least critical. The DO-178B criticality level is based upon the contribution of the associated software to potential failure conditions. DO-178B failure conditions are determined by the FAA system safety assessment process. Each avionics system has one defined criticality level (and must be approved by the FAA); however different components within that system can have differing criticality levels subject to certain guidelines. The higher the DO-178B criticality level, the greater the amount of software development effort required. Our DO-178B Training provides additional details on DO-178B criticality levels and how to determine, apply and optimize.