AST September 2018 'ASTORS' Showcase Edition Sep 2018 Final (9.18.18) | Page 26

Volume 27
September 2018 Edition
Addressing the Four D’s help security designer’s prepare an effective plan for mitigating and reducing the threat of
security risk and vulnerability. (Courtesy of Automatic Systems America)
The Four D’s of Physical Security Design
& Pedestrian Entrance Control
By American Security Today Editorial Direc-
tor, Tammy Waitt The Four D’s: Deter, Detect,
Delay, and Deny.
Security Design experts often
refer to a simple but import-
ant concept when address-
ing risk mitigation strategy as
part of an effective security
system design. Addressing these four objec-
tives help a security designer
prepare an effective plan for
reducing vulnerability.
The textbooks for ASIS’s Physical
Security Professional (PSP) certi-
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