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Ergonomi INF112 Systemkonstruksjon
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Jan Hendrik Demmink (PhD) Institutt for
Fysioterapi Høyskolen i Bergen
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problemet med Nederlendere
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Ergonomics after 1945
Big changes explorations of human limitations in
interaction with technology
Studies of mental work load
Limitations in capacity to learn
Factors in the organization
But Development happens at first as a result of
violent accidents.
Fly crash
Three Mile Island
Estonia
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Ergonomi INF112 Systemkonstruksjon
Proportion between industry and office sector
Percent of employees
Industry Office sector
Office sector post, financial service, public
administration.
SourceArbeidskraftundersøkelsen Sysselsatte
etter næring
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Changed conditions
Constant increasing claim for readjustment and
fast changes
Increased focus on cost and earning
Theory of Taylor as principle for work and
organization is seen as a problem.
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Ergonomi INF112 Systemkonstruksjon
The cybernetic office
Communication technology
Human resource
Task
Physical environment
Information technology
Fast change in technology
Integration of different technologies
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Productivity and IT - investments
Productivity Increased effectivity etc..
It investments
From Landauer 1995
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To what disappears the money
Aftenposten 15/2/96
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Why such a bad effectivity
Systems have bad usability.
Bad organization adjustment
Bad interplay between persons and their work
environment
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User-friendliness of systems
Systems are not adjusted for the task
Too complicated
Difficult to learn
It is easy to make mistakes
Not adapted to heterogeneous user characteristics
Suites not the users mental models of system
function.
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Why are systems bad adjusted
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Direct perception
J.J.Gibsons ecological approach
Environment consists in
Transpositions
Invariance
Afford idea
Perception as an interaction between the
individual and the environment.
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The ecological principle
In spite of humans intelligence and sophisticated
tools, the modern human is still adapted to the
environment of our forefathers, which lived for
about 50.000 years.
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The ecological approach to ergonomics
Humans are active exploring
Perceptions activity fissure explains why
Perceptions activity link explains how
Study of human machine interaction
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An evolution stress model
Degree of managing capability
Degree of ecological confirmity
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A Individual limit of managing. B Managing
involves negative consequences. C managing
involves injurious to health.
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Gestalt persepsjonsprinsipper
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Kontekstens viktighet
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Illusjoner - modulære prosesser
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Kontekstens viktighet
Ergonomi INF112 Systemkonstruksjon
Illusjoner - modulære prosesser
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Thank You
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