System engineering involves inputs from multiple fields. There are various objectives of the systems engineering process. Systems engineering process incorporates important concepts of the emergent system properties such as reliability and security. The system engineering process is general in many ways. The actual implementation of the system engineering process requirements can vary from program to program. The life cycle process phases, conceptual design phase, preliminary design phase, detail design and development phase, production and construction phase, operational use and system support phase and even the disposal and recycling phase, should all be considered in the system engineering process.