What graph is used to match project type and patient risk to determine work area classification?

• A. Matrix
• B. Flowchart
• C. Schedule
• D. Blueprint

Answer: (A)

The main idea is using a matrix to map two key factors—project type and patient risk—into a single work area classification. A matrix provides a grid where you cross each project type (like renovation, demolition, new construction) with patient risk levels (low, medium, high). Each cell then indicates the required containment level and infection control measures for that specific combination. This makes the process consistent and quick: you look up the project type and the patient risk, and you immediately know what area classification and controls are needed, such as whether standard precautions suffice or whether enhanced engineering controls, negative pressure, barriers, or restricted access are required. For example, a major renovation near an ICU (high patient risk) would fall into a cell that calls for stringent containment and controls, while routine maintenance in a general ward (low patient risk) would map to simpler precautions. A flowchart, schedule, or blueprint doesn’t provide this cross-tabbed mapping: flowcharts show a sequence of steps, schedules emphasize timing, and blueprints are design drawings.