A predictive survey (also called a virtual or model-based survey) is the appropriate and only feasible methodology for a facility that does not yet physically exist in its complete form. Since the warehouse has only its foundation and perimeter walls, it is impossible to conduct any form of physical (active or passive) survey of the complete environment. A predictive survey uses architectural floor plans imported into a tool such as Ekahau Site Survey, where the engineer defines attenuation areas representing planned materials and structures: concrete block walls, steel shelving racks, metallic surfaces, and other warehouse-specific obstructions. The software models RF propagation through these defined attenuation values, enabling accurate AP placement planning, antenna selection, and channel planning without physical access to the complete facility. The output is a validated bill of materials with AP counts, models, and associated infrastructure requirements. Passive surveys (Options A and C) require physical APs transmitting RF signals to collect measurement data — impossible in an incomplete building. A hybrid approach mixing passive survey with predictive modeling introduces measurement errors from the incomplete physical state. Reference: WLSD Study Guide — Survey Types, Predictive Survey Methodology, Pre-Deployment Planning for New Construction.