Unit 1 - Human Factors Flashcards
(31 cards)
HumanFactors
Combination of anthropometrics, psychological, and physiological factors
Aims of Human Factors
- Reduce stress and fatigue
- Increase safety
- Increase ease of use
- Enhance comfort
Ergonomics
The application of scientific information regarding human’s interactions to systems
Physical Ergonomics
Body Measurements: size, strength and physical capacity
Cognitive Processes
HIPS: sensory —> central —> motor
How humans respond to environmental stimuli
Organisational Ergonomics
Work design (working environment)
AnthropometricData
Study of human body measurements and dimensions
Static Data
Fixedorstandardposition
e.g.height, armlength
Dynamic Data
Taken during physical activities/tasks
1-99th Percentile
Describes the entire population/distribution of measurements
50th Percentile
Average measurements - for common/standard product use
5-95th Percentile
Accommodates the majority (for clearance)
Clearance
Physical distance between two objects
Reach
3D space one has access to in a fixed location
Adjustability
The ability of a product or system to be modified to fit the needs and preferences of individual users
5th Percentile
Extreme cases - Smaller users
95th Percentile
Extreme cases - Larger users (Comfortability)
Range of Sizes
To fit various percentiles
Ergonomes
2D scaled physical anthropometric model based on a specific percentile human forms
Nominal Scale
Classification by name
Ordinal Scale
Classification along a continuum
Interval Scale
Numerical difference between values
Ratio Scale
Numerical difference between values and have an absolute zero
Psychological Factors
- Light: safety, precision
- Sound: feedback, alertness
- Temperature: comfortability (alertness)
- Texture: facilitates grip
