Understand, test and assess vehicle systems. In practice this covers independent execution, quality assurance of one's own results, and close alignment with adjacent roles and interfaces.Understand, test and assess vehicle systems. In practice this covers independent execution, quality assurance of one's own results, and close alignment with adjacent roles and interfaces.Understand, test and assess vehicle systems. In practice this covers independent execution, quality assurance of one's own results, and close alignment with adjacent roles and interfaces.