• FGS Mapping per ISA 84.00.07 well adopted technique for systematic determination of how many detectors, where, and why • Improved (more accurate) techniques will require more analysis effort, but will result in substantially lower detector counts - Dispersion modeling for minimum possible gas cloud size - Scenario coverage for gas detector coverage - Plume fire models instead of point models / ray tracing. © 2017 International Society of Automation (ISA). All rights reserved.