Engineering, Life Cycle Stages, and Processes

• Engineering is an approach that involves a set of processes to develop a solution, which can be a system, software, or any deliverable, transformed from stakeholders’ requirements and support the solution throughout its life. (short version)
• Engineering is an approach that involves a set of processes of applying knowledge and skills to understand and manage stakeholders’ requirements, propose and implement a solution to address those requirements, and utilize and support that solution to create value persistently until its retirement. (long version)
• Systems and software engineering are engineering approaches to deliver systems or software as a solution.

Source: Engineering, Life Cycle Stages, and Processes