Read e-book online Engineering a Safer World: Systems Thinking Applied to PDF

By Nancy G. Leveson

Engineering has skilled a technological revolution, however the easy engineering suggestions utilized in safeguard and reliability engineering, created in a less complicated, analog global, have replaced little or no through the years. during this groundbreaking ebook, Nancy Leveson proposes a brand new method of safety--more fitted to modern advanced, sociotechnical, software-intensive world--based on sleek platforms pondering and platforms concept. Revisiting and updating rules pioneered via Fifties aerospace engineers of their procedure safeguard suggestion, and checking out her new version generally on real-world examples, Leveson has created a brand new method of security that's more advantageous, more cost-effective, and more uncomplicated to take advantage of than present thoughts. Arguing that conventional versions of causality are insufficient, Leveson offers a brand new, prolonged version of causation (Systems-Theoretic twist of fate version and strategies, or STAMP), then then exhibits how the hot version can be utilized to create strategies for approach safeguard engineering, together with twist of fate research, threat research, procedure layout, security in operations, and administration of safety-critical platforms. She applies the recent recommendations to real-world occasions together with the friendly-fire lack of a united states Blackhawk helicopter within the first Gulf conflict; the Vioxx bear in mind; the U.S. army SUBSAFE application; and the bacterial infection of a public water provide in a Canadian city. Leveson's strategy is proper even past security engineering, delivering thoughts for "reengineering" any huge sociotechnical procedure to enhance protection and deal with probability.

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Extra resources for Engineering a Safer World: Systems Thinking Applied to Safety (Engineering Systems)

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In addition, an FAA regulation issued in July 1975 required all wide-bodied jets to be able to tolerate a hole in the fuselage of twenty square feet. By labeling the root cause in the event chain as baggage handler error and attempting only to eliminate that event or link in the chain rather than the basic engineering design flaws, fixes that could have prevented the Paris crash were not made. Until we do a better job of identifying causal factors in accidents, we will continue to have unnecessary repetition of incidents and accidents.

As such, event chain models encourage limited notions of linear causality, and it is difficult or impossible to incorporate nonlinear relationships. ” Such a statement would not be allowed in the event-chain model of causality because there is no direct relationship between the two. Many smokers do not get lung cancer, and some people who get lung cancer are not smokers. It is widely accepted, however, that there is some relationship between the two, although it may be quite complex and nonlinear.

They either were not replaced or were replaced by unskilled workers. When the plant was first built, operators and technicians had the equivalent of two years of college education in chemistry or chemical engineering. In addition, Union Carbide provided them with six months training. When the plant began to lose money, educational standards and staffing levels were reportedly reduced. S. engineers make regular on-site safety inspections. But by 1982, financial pressures led UC to give up direct supervision of safety at the plant, even though it retained general financial and technical control.

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