"A must do" in planning is best described by which term?

• A. Must Do
• B. Directive
• C. Obligation
• D. Constraint

Answer: (D)

In planning, a must-do item is a constraint: it imposes a non-negotiable requirement that the plan must meet. Because it’s not optional, it narrows what you can do, shaping the sequence of tasks and how you allocate limited resources. A real-world example would be getting regulatory approval before any construction work begins—the approval is something the project cannot proceed without, so it constrains the schedule and activities you can undertake. This differs from a directive, which is merely an instruction from someone in authority, and from an obligation, which is a duty or legal requirement—but neither of those alone describes a planning boundary the project must satisfy. The must-do, as a constraint, sets that hard boundary that keeps the plan feasible and aligned with essential requirements.