Description:  Digital Engineering is an integrated digital approach that uses authoritative sources of systems' data and models as a continuum across disciplines to support lifecycle activities from concept through disposal. DoDI 5000.88, Engineering of Defense Systems, requires that for all defense acquisition programs, the lead systems engineer (LSE) will integrate reliability and maintainability (R&M) engineering as an integral part of the overall engineering process and the digital representation of the system being developed. The LSE will plan and execute a comprehensive R&M program using an appropriate strategy consisting of engineering activities, products, and digital artifacts.