A project stakeholder identifies a need for a vendor to provide 24-hour support for a product under development. Which of the following BEST describes where this information would be documented?

A service-level agreement is specifically designed to document the agreed-upon levels of service a vendor must provide, including support availability windows such as 24-hour coverage. It establishes measurable commitments, remedies for non-compliance, and performance expectations between the buyer and the service provider.

A purchase order is a financial transaction document authorizing payment for goods or services, not a document that defines service levels or support requirements.

A statement of work describes the specific tasks, deliverables, and scope of work a vendor will perform, not the ongoing support obligations post-delivery.

A project charter authorizes the project and identifies high-level objectives and the project manager's authority - it does not govern vendor support commitments.