What is a good sample syntax for writing a well-defined requirement?

The syntax presented in the first choice—[Subject] [Condition] [Action] [Object] [Constraint]—provides a comprehensive structure for formulating a well-defined requirement. Each component plays a critical role in clearly expressing what is needed:

• The Subject identifies who or what the requirement pertains to, establishing the context and ensuring the requirement is directed to the correct entity.

• The Condition specifies any prerequisites or scenarios under which the requirement holds true, which helps to clarify when and how the requirement is applicable.

• The Action describes what needs to be done, providing clarity on the behavior or functionality being requested.

• The Object indicates what the action is being performed on, helping to understand the scope and impact of the action.

• The Constraint outlines any limitations or restrictions that must be followed, ensuring that the requirement is achievable and realistic.

This structure aids in effectively communicating the requirement to stakeholders by ensuring all necessary elements are included. It reduces ambiguity and allows for better understanding and traceability throughout the development process.