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Human Factor Engineering. ECE 796/896. What is it ?. ergonomics - Human Factors Human -Machine systems Example: “ Error by Design”. Human-Machine system. Human-Machine Systems. Manual Systems Mechanical systems Automated Systems. Human-Machine System. Components Sensing
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Human Factor Engineering ECE 796/896
What is it ? • ergonomics - Human Factors • Human -Machine systems • Example: “ Error by Design”
Human-Machine Systems • Manual Systems • Mechanical systems • Automated Systems
Human-Machine System • Components • Sensing • Information Storage • Information Processing • Action functions • Components interact to achieve system objective
Systems • Inputs - Outputs • Open - Closed Loop • Reliability - MTF - series/parallel
Systems • Purposeful • Can be Hierarchical • Operate in an Environment
Reliability • Series - together & interdependently • one failure = system failure • failures are independent • Max. system reliability = least reliable component. In reality most systems are less reliable than the worst component. Ex: 100 components, each .99 = system .365
Reliability • Parallel: Components in parallel do the same function. They provide a backup for each other. Adding components increases reliability. • EX: 4 components in parallel, each is .70 , the system is .992.