The document outlines requirements for an SMS-based spare delivery tracking system. It includes sections on the project scope, general description, specific requirements, and analysis models. The system will allow users to track spare part deliveries via SMS and email, generate delivery reports, and view report data. It is intended for spare parts managers, vendors, and customers to help assure on-time delivery and provide delivery status updates and logs. The requirements and system behavior will be modeled using use cases, activity diagrams, swim lanes, class diagrams, state transitions, and data flow diagrams.