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Lecture

Safety Lecture.docx

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Department
Software Engineering
Course
SE 101
Professor
Edgar Mateos
Semester
Fall

Description
Safety Lecture November 12, 2012 Safety and Risk Managemet  Motivations for Safety o Personal ethics o Professional responsibility o Regulations and codes o Legal liability  Contract law  Tort law  Product liability law  Responsibility of the Design o Engineers are responsible for ensuring designs are safe o Failure to act to correct a potentially dangerous situation and failure to follow codes/standards are professional misconduct  Safety concerns o Engineers need s to consider safety of:  Eventual users  Workers involved in manufacture/fabrication o In some cases, engineers must take into account misuse  Users may have wide variation in abilities  Minimum skill level should not be overrated  Warning labels should be used to deter inappropriate usage  Hazards o Hazard: anything that has potential to cause injury, death, property damage, financial waste, or any other undesirable consequence o No engineering design or workplace environment can ever be absolutely free of hazards o Goal of engineering is to reduce risk of injury or illness to “acceptable level”  Often, reducing risk of injury/illness requires very little engineering effort o Engineers need methodical procedures to recognize/control hazards 1. Identify 2. Try to prevent or eliminate need for creating 3. Use control measures at source, along path, and at receiver to reduce severity to acceptable level 4. If unsuccessful, take appropriate remedial action i. Recall unsafe devices ii. Notify people of danger iii. Assist injured persons  Principles of hazard recognition and control 1. Asses capabilities and limitations of users 2. Anticipate common errors and modes of failure 3. Evaluate designs for safety and health 4. Provide adequate instructions and warnings 5. Design safe tooling and workstations 6. Consider maintenance needs 7. Provide clear indications of danger 8. Control build-up of energy 9. Recall products if necessary  Maintenance needs checklist 1. More frequently replaced items should be easily accessible 2. Standard interchangeable parts should be kept in common locations 3. Designs should be modular for simple field repairs 4. Products should be clearly identified 5. Safe servicing should b e possible 6. Controls should prevent machines form turning on during maintenance 7. Storage areas should be provided for special tools 8. Electrical machines should be grounded to minimize shock hazards  Industry standards for signs o Danger  White foreground  Red background o Warning  Black foreground  Orange background o Caution  Black foreground  Yellow background o Notice  White foreground 
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