SVI

SVI is an acronym with multiple meanings across different fields. The most commonly encountered uses are the Social Vulnerability Index in public health and disaster planning, the switched virtual interface in computer networking, and the stroke volume index in medicine.

Social Vulnerability Index: The Social Vulnerability Index is a measure developed by the U.S. Centers for Disease Control and Prevention's Agency for Toxic Substances and Disease Registry. It combines 15 socio-economic and demographic variables into four themes—socioeconomic status; household composition & disability; minority status & language; and housing type & transportation—to identify communities that might have greater difficulty coping with hazardous events or recovering afterward. The SVI is published at census tract and county levels and is used by public health officials, emergency managers, and researchers to target resources, plan interventions, and study vulnerability patterns.

Switched Virtual Interface: In computer networking, a switched virtual interface is a virtual Layer 3 interface configured on a multilayer switch. Each SVI corresponds to a VLAN and provides an IP subnet for routing between VLANs and for switch management. SVIs enable inter-VLAN routing on a centralized device, often used in enterprise networks to simplify routing and control traffic between VLANs without requiring external routers.

Stroke Volume Index: In medicine, the stroke volume index is the stroke volume normalized to body surface area, expressed in milliliters per square meter (mL/m^2). It is used in hemodynamic monitoring to assess cardiac performance, particularly in critical care settings, and is related to other cardiac indices such as cardiac output and cardiac index.

SVI thus has several domain-specific meanings, with these three being the most widely recognized. The intended meaning typically depends on the professional context.