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Risk, Safety and Accidents

Risk, Safety and Accidents. The most important duty of an engineer is to protect the safety and well-being of the public. Definitions. Safety is defined as the freedom from damage, injury or risk. Risk is defined as the possibility of suffering harm or loss, similar to danger. Linked. The definitio

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Risk, Safety and Accidents

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    1. Chapter 5 Risk, Safety and Accidents

    2. Risk, Safety and Accidents The most important duty of an engineer is to protect the safety and well-being of the public

    3. Definitions Safety is defined as the freedom from damage, injury or risk Risk is defined as the possibility of suffering harm or loss, similar to danger

    4. Linked The definitions of safety and risk are linked We engage in risky behavior when we do something that is unsafe

    5. Factors in Risk and Safety Whether something is safe or free of risk is subjective and depends on many factors Voluntary vs. involuntary risk Many consider something safe if the risks involved have been fully disclosed to them beforehand

    6. Factors in Risk and Safety

    7. Factors in Risk and Safety

    8. Four Criteria for Safe Design Designs must comply with applicable laws A design must meet the standard of accepted engineering practice. If it is accepted practice to go further than regulations require, designs which do not meet the de facto industry standards will be rejected by the public

    9. Designing for Safety Define the problem, including the needs, requirements and constraints Generate several different solutions to the problem Analyze each solution to determine the pros and cons of each Test the solution Select the best solution Implement the chosen solution

    10. Risk-Benefit Analysis Risks and benefits of a project are assigned dollar amounts Most favorable ratio between risks and benefits is sought

    11. Accidents We define three types of accidents Procedural Engineered Systemic

    12. Procedural Accidents Most common accident category Often caused by a bad choice or failure to follow regulations or established procedures

    13. Engineered Accidents Caused by flaws in the design of a product or system and include Failure of materials Devices that do not perform as expected Devices that do not perform well under all circumstances encountered Engineered failures should be anticipated during the design phase and should be caught and corrected during testing

    14. Systemic Accidents The hardest accident type to understand and control Characteristic of complex technologies and systems and within the complex organizations required for their operation

    15. Conclusion Definitions of safety and risk Factors in determining safety and risk Criteria for safe design Designing for safety Accidents Procedural Engineered Systemic

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