# human factors ergonomics homework help

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• Q1:Write a short essay on human factor analysis and classification system (HFACS). See Answer
• Q4:Q1: Read the following article: Campion, M. A., Mumford, T. V., Morgeson, F. P., & Nahrgang, J. D. (2005). Work redesign: Eight obstacles and opportunities. Human Resource Management, 44(4), 367-390. DOI: 10.1002/hrm.20080 Summarize the obstacles to work redesign and the authors' suggestions for managing these obstacles in practice. See Answer
• Q5:Q2: Describe briefly in 3 pages (12 points Times New Romans with 1.5-line space; 2.5 cm margins from all sides) one direct method to measure Situation Awareness. See Answer
• Q6: A Job Safety Analysis (also called Job Hazard Analysis) incorporates what key 3issues? See Answer
• Q7: What is worst reason to automate a system? See Answer
• Q8: US Steel Tubular Products (USTP) Inc. is in the process of hiring a repair person for a 3-machine processing department. Two candidates are being considered. The first candidate can perform repairs at the rate of 3 machines per hour and earns \$25 an hour. The second candidate, being more skillful, receives \$35 an hour and can repair 4machines per hour. USTP estimates that each broken machine will incur \$60 per hour due to lost production.Assuming that machine breakdowns occur according to a Poisson distribution with a mean of 2 per hour (per working machine) and that the repair time is exponential, which repair person should be hired? (a) (2 points) Define the states, classify the queueing system, draw the state transition rate diagram with the transition rates, given that 2 is the breakdown rate per working machine and µ is the repair rate for the repair person. (b) (3 points) Find the steadystate probabilities for each repair person (unskillful and skillful). (c) (2 points) Determine the average number of broken machines for each case (unskillful repair person and skillful repair person). nts) Determine the average cost per hour for each case and decide which repair person should be hired.See Answer
• Q9: With reference to the website image (SIE webpage) provided below, list any Three display design principles that are present in (or that could be added to) the website and describe how they support user's perception, understanding, and navigation through the website. (5 points each, 15 points in total)See Answer
• Q10: Which Company has the higher injury incidence rate (using OSHA's formula)? Company A. Has 100 employees who worked 80,000 hours in 2020 and had 5 injuries Company B. Has 50 employees who worked 60,000 hours in 2020 and had 4 injuries See Answer
• Q11: What is a term describing the degree to which the system provides representations that can be directly perceived in terms of the expectations and intentions of the user? See Answer
• Q12: Oxygen consumption is an effective way to measure exertion during static muscle contraction. OSHA's preferred order from least effective to most effective abatements in the Hierarchy of Controls is: personal protective equipment; administrative procedures and policies; engineering controls; substitution and elimination The clutter-avoidance principle requires that there should be no space between components. There is good evidence that the Union Carbide disaster releasing methylisocyanategas in Bhopal India due limited alarms and controls was the worst industrial accident in modern history (1900 on). Classroom based training is a near to task performance support intervention. Redundancy should be avoided as much as possible in the design of display and controls. Both aerobic and anaerobic metabolism supply ATP to muscle cells. Fitt's law, which applies to hand, arm and foot movements, uses the Index of Difficulty, which is a ratio of double the movement amplitude divided by the size of the target width (2A/W). Shift work schedule designers need to be aware of how disrupting the natural humantendency to sleep at night and be awake during the day has on employees. The social model reframes disability, stating that the actual environment disables people by its design.See Answer
• Q13: Universal Design principles include: See Answer
• Q14: Stroke volume is measured as the amount of blood pumped per beat by the: See Answer
• Q15: Compare and contrast the features of the below two doors for how well they ad hereto the principles of universal design. List at least FIVE principles of universal design,and discuss how each door meets/does not meet the principle of universal design.(Use at least 5 principles, 3 points each, 15 points total) See Answer
• Q16: The best reason to use participatory ergonomics is: See Answer
• Q17: When a person is performing a heavy dynamic work, the following physiological measures increase: See Answer
• Q18: The Revised NIOSH Lifting equation's Recommended Weight Limit is acceptable to what percentages of healthy adult men and women: See Answer

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