A system of defined roles within a process.
Within an SMS system the functions of each system, or defined roles are hidden within human factors. In contradiction to mechanical systems, human factors include unpredictable variations. These variations are harnessed by defining roles for each person within an SMS system.
The accountable executive has certain defined roles which the AE must perform for the total system to function, without expectations that another person will pick up where the AE did not fulfil the role. The role of an accountable executive is to fuel the SMS system with safety. An effective AE is involved strategically rather than operationally for the SMS system to have an anchor point within the organization.
Without defining the roles or to assume a person should know better is often how unsuccessful businesses are operating. The definition of those systems is for a person to apply variations and pick up the slack as they see fit. Within an NDT world of systems, this would compare to placing an
Fill in the blanc and play that role.
An accountable executive has defined roles for one reason only, and that if for the SMS system to be effective where processes are producing outputs of what the processes were designed for. This does not imply that the processes should not, or does not identify flaws within the activities, but rather confirm that the processes of an effective SMS system identify both normal variations and special cause variations. In an NDT world, a jet-engine disk could be acceptable without flaws, or the process, when applied correctly, could identify an unlikely flaw in the material.