This document is a guideline for the application of ISO/IEC/IEEE 15288:2015. It addresses system@ life cycle@ organizational@ project@ and process@ concept application@ principally through reference to ISO/IEC/IEEE 24748-1 and ISO/IEC/IEEE 15288:2015. It gives guidance on applying ISO/IEC/ IEEE 15288:2015 from the aspects of strategy@ planning@ application in organizations@ and application on projects. It also provides comparison of the differences between ISO/IEC/IEEE 15288:2015 and the prior versions@ ISO/IEC 15288:2008. This document is intended to be consistent with both ISO/IEC/IEEE 24748-1 and ISO/IEC/ IEEE 15288:2015 in its treatment of life-cycle concepts and systems engineering processes. NOTE Systems engineering for defense programs is addressed in IEEE Std 15288.1@ Application of Systems Engineering on Defense Programs.