The University of Adelaide, School of Computer Science Security Supervision and Management Theory and Practice of Asset Protection, 4th Edition The University of Adelaide, School of Computer Science 2 June 2018 Chapter #5 The Theories of Accident Causation Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer

Heinrich’s Domino Theory The University of Adelaide, School of Computer Science 2 June 2018 Heinrich’s Domino Theory Five stages Social environment and ancestry Faults of a person Unsafe act or condition Accident Injury Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 2

Ferrell’s Human Factor Model The University of Adelaide, School of Computer Science 2 June 2018 Ferrell’s Human Factor Model Theory identifies three main causes Overload Incompatibility Improper activity Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 3

Petersen’s Accident/Incident Model The University of Adelaide, School of Computer Science 2 June 2018 Petersen’s Accident/Incident Model Similar to Ferrell’s Human Factor Model Ergonomic traps Separates the decision to err from the overload cause Reasons to choose to err logical decision due to the situation an unconscious desire to err perceived low probability of an accident occurring Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 4

Copyright © 2015, Elsevier Inc. All rights Reserved The University of Adelaide, School of Computer Science 2 June 2018 Systems Models A system model view sees a harmony between man, machine, and environment Risk-taking Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 5

Reason’s Swiss Cheese Model The University of Adelaide, School of Computer Science 2 June 2018 Reason’s Swiss Cheese Model Every step in a process has the potential for failure Holes in the layers of defense Two types of failure Active Latent Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 6

The Integration of Theories and General Safety Program Implications The University of Adelaide, School of Computer Science 2 June 2018 The Integration of Theories and General Safety Program Implications All theories are incomplete Only explain a portion of accidents True accident prevention can only occur when all possible causes are addressed Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 7

Copyright © 2015, Elsevier Inc. All rights Reserved The University of Adelaide, School of Computer Science 2 June 2018 Emerging Trends Fines by the Occupational Safety and Health Administration (OSHA) have been increased More states are legislating safety standards Copyright © 2015, Elsevier Inc. All rights Reserved Chapter 2 — Instructions: Language of the Computer 8