III. Reliability in Design and Development
A. Reliability design techniques
10. Human factors (Understand)
Describe the relationship between human factors and reliability engineering.
Does your system play well with humans?
Additional References
General Human Factors Design Principles (article)
Comparing Human and Machine Capability (article)
Human Factor Considerations (article)
Quick Quiz
1-98. In an automobile factory in with a highly repetitive operations, how should this operation be assigned?
(A) A machine should perform all the operations.
(B) A human operator should perform all the operations.
(C) A machine and a human operator should perform the operations alternately.
(D) A human operator should be assisted by a computer for the operations.
(A) A machine should perform all the operations.
Machines are very good at repetitive, precise, and fast operations. Humans are not. If done by a person a good practice is to rotate the people though the position regular within a shift of prevent boredom and errors, plus to minimize the risk of repetitive motion injures.
- For critical functions, what is the human line-of-sight angle specified by MIL-STD-1472?
(A) 7.5 degrees
(B) 15 degrees
(C) 30 degrees
(D) 45 degrees
(B) 15 degrees
This is tough if you do not know the standard or have experience working with human factor considerations. You can quickly narrow done the options by assuming the requirements expect the person to not have to strain their eyes or turn their head (I do not know if this true or now… just guessing). Either you have the standard available – which for similar problems that dive into very specific details you will not have those documents available (most likely) is to make an educated guess.
1-104. Why are human factors important when designing for reliability?
I. because habits can sometimes be difficult to change
II. because weak components must be easily replaceable
III. because environmental conditions can influence performance
IV. because age and skill can limit one’s ability to use equipment
(A) I and IV only
(B) II and III only
(C) II, III, and IV only
(D) I, II, III, and IV
(D) I, II, III, and IV
Human factors including any interaction of a human with the equipment, thus includes installation, operation, and maintenance.
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