The conversation drifted back and forth from profundities about the nature of God, the universe and man, to lighter questions.
Suddenly, Einstein lifted his head, looked up at the skies and said, “We know nothing about it at all. Our knowledge is but the knowledge of school children.”
“Do you think that we shall ever probe the secret?” “Possibly, we shall know a little more than we do now. But the real nature of things –that we shall never know, never.”
Along in August comes a windless morning
Holding its breath to catch earth’s strong heartbeat.
Even the aspens cease their perpetual tremor.
There is a hush…
…a waiting for one leaf to fall and lay bare that secret pulse.
- Heuristic Evaluation or Heuristic Inspection Methods
- the most popular of what are called “discount usability evaluation”
- because they are typically easy to do, involve fewer than 10 experts, and are much less expensive than other methods.
- the objective is to detect problems early in the design process, when they can be most easily and economically corrected.
- they are called “heuristic” because evaluators assess the degree to which the design complies with recognized usability rules of thumb or principles, such as those proposed by Nielsen (1994) (retrieved from https://www.nngroup.com/articles/ten-usability-heuristics/)
- visibility of system status
- match between system and the real world
- user control and freedom
- consistency and standards
- error prevention
- recognition rather than recall
- flexibility and efficiency of use
- asthetic and minimalist design
- help users recognize, diagnose, and recover from errors
- help and documentation
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Usability: deals with specific issues of human performance during computer interactions for specific tasks within a particular contest.
- refers to how well the information system product was designed for users to learn as well as to use.
- refers to how the system allows users to carry out their tasks safely, effectively, and pleasantly.
- is related to the human-centered design that is characterized by the active involvement of users and the clear understanding of user and task requirements
Usability testing: creating realistic clinical scenarios to which end users are asked to apply configured electronic tools, using the hardware that will be used in production.
The usability of a system can be measured by:
- Effectiveness (can users successfully achieve their objectives?)
- Efficiency (how much effort and resource are expended in achieving those objectives?)
- Satisfaction (was the experience considered satisfactory?)
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Ergonomics is the science of designing a work environment so that it is convenient to use and does not prove injurious to health. It is used in the United States to describe the design and implementation of equipment, tools, and machines related to human safety, comfort, and convenience.
- It is the study and design of a work environment that maximizes productivity by reducing operator fatigue and discomfort.
- It considers physical stresses placed on joints, muscles, nerves, and tendons as well as environmental factors that can affect hearing and vision.
- Poor setup of computer equipment leads to somatic complaints that include headaches, eyestrain, irritation, stress, fatigue, and neck and back pain.
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