Which of the following best describes a system element?

A system element is best described as a member of a set of elements that constitutes a system. This definition emphasizes that each element is a part of a larger whole and plays a specific role in the functioning of the system.

In systems engineering, understanding that elements are integral to the system's architecture is crucial, as each element interacts with others and contributes to the overall objectives and behaviors of the system. These elements can be components, subsystems, or even processes that together define what the system is and how it operates.

The other choices do not accurately describe a system element. An external factor affecting the system refers to influences outside the system, which may impact it but are not considered elements of the system itself. A component that is independent of the system would not be classified as a system element, since it doesn’t belong to that specific system framework. Lastly, a temporary condition of the system describes a state rather than an element; it does not represent a physical or defined component that can be analyzed within the context of an overall system architecture. Thus, the assertion that the correct choice reflects the essential nature of system elements is accurate and aligns with systems engineering principles.