Normal accidents analyzes the social side of technological risk charles perrow argues that the conventional engineering approach to ensuring safety building in more warnings and safeguards fails because systems complexity makes failures inevitable he asserts that typical precautions by adding to complexity may help create new categories of . Normal accidents living with high risk technologies updated edition perrow charles 9780691004129 books amazonca cdn 5399. Book description normal accidents analyzes the social side of technological risk charles perrow argues that the conventional engineering approach to ensuring safety building in more warnings and safeguards fails because systems complexity makes failures inevitable he asserts that typical precautions by adding to complexity may help create . Though less often cited than high reliability theory in the health care literature normal accidents theory is equally prominent in the study of complex organizations a more pessimistic view normal accidents theory suggests that in some settings a major accident becomes almost inevitable perrow identifies complexity and tight coupling as the two factors that create an environment in