• Emergency Medical Services (EMS) are a type of emergency service dedicated to providing out-of-hospital acute medical care, transport to definitive care (ambulance), and other medical transport to patients with illnesses and injuries which prevent the patient from transporting themselves.
• Good EMSs provide the following functional features:
– Availability (24 by 7)
– Defect free Services
– Ease of Access to Everyone
– High Quality (minimum failures and accidents)
– Types of Services Supported (basic life services to advanced life support)
• The following information models represent different aspects of a general
– Use Cases: capture the activities performed by the system and the key players. These correspond to the Functional Requirements
– System Sequence Diagram (SSD): Refinement of Use cases. Shows the sequence of activities/messages between the players
– Class Diagram: Shows the key objects in the system and their properties (attributes and methods)
