What does a well-defined requirement typically have in terms of verifiability?

A well-defined requirement typically encompasses the characteristic of being traceable to stakeholders. This traceability is crucial because it establishes a clear connection between the requirement and the stakeholders' needs, desires, and objectives. In systems engineering, having the ability to trace requirements back to specific stakeholders ensures that the developed system aligns with their expectations and meets their needs. This connection plays a vital role in validating that the requirement is relevant and necessary for the success of the project.

Traceability not only helps in verifying that the requirement was derived from stakeholder input but also aids in managing changes as the project evolves. If the requirement is traceable, it becomes easier to assess the impact of any changes on the stakeholders' needs and thus maintain the alignment of the project objectives with stakeholder expectations.

While the other options address attributes that might be desirable in a requirement—such as being achievable or implementable—these characteristics do not specifically relate to the foundational principle of verifiability through stakeholder alignment. Ensuring a requirement is traceable enhances the robustness of the requirements management process, aligning it closely with systems engineering best practices.