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300-425 · Question #298

In a warehouse deployment, why is a predictive survey often insufficient?

The correct answer is A. Predictive surveys cannot account for metal racks and variable inventory. Predictive surveys rely on static software models that cannot accurately simulate the RF behavior of metal shelving, forklifts, and constantly changing inventory in a warehouse. A post-deployment or active survey is required to capture real-world propagation.

Wireless Site Survey

Question

In a warehouse deployment, why is a predictive survey often insufficient?

Options

  • APredictive surveys cannot account for metal racks and variable inventory
  • BWarehouses do not require Wi-Fi coverage
  • CPredictive surveys are more expensive than passive surveys
  • DWarehouses always use only 2.4 GHz Wi-Fi

How the community answered

(65 responses)
  • A
    80% (52)
  • B
    12% (8)
  • C
    5% (3)
  • D
    3% (2)

Why each option

Predictive surveys rely on static software models that cannot accurately simulate the RF behavior of metal shelving, forklifts, and constantly changing inventory in a warehouse. A post-deployment or active survey is required to capture real-world propagation.

APredictive surveys cannot account for metal racks and variable inventoryCorrect

Warehouses contain dense metal racking and inventory that absorbs, reflects, and scatters RF signals in ways that predictive modeling tools cannot simulate. Because inventory levels and placement change frequently, the RF environment is dynamic, making a static predictive model unreliable. An active or post-deployment survey is necessary to validate actual coverage.

BWarehouses do not require Wi-Fi coverage

Warehouses frequently require Wi-Fi for inventory management systems, barcode scanners, and mobile devices, making wireless coverage essential.

CPredictive surveys are more expensive than passive surveys

Cost is not a distinguishing factor between survey types in this context; the technical limitation of modeling accuracy is the issue.

DWarehouses always use only 2.4 GHz Wi-Fi

Warehouses use both 2.4 GHz and 5 GHz bands; no standard limits them to a single band.

Concept tested: Site survey limitations in dynamic RF environments

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/b_cisco_wireless_lan_design_guide/b_cisco_wireless_lan_design_guide_chapter_0110.html

Topics

#predictive survey limitations#warehouse deployment#metal RF obstruction#survey accuracy

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