Keyboards have become extremely common control devices with the expansion in
the use of computers. There are models that have each half of the keyboard slightly rotated.
This feature helps position the keys in line with the arms and hands. Arms and hands
cannot be positioned perpendicular to a straight keyboard because of the width of the body.
To use a straight keyboard, one must bend the wrists, thus putting some strain on the wrists.
Workers should change tasks to reduce the intensity of keyboard data entry and find oppor-
tunities to stretch and relax the muscles and tendons involved in typing. Those involved
in data entry should look for ways to avoid keyboard data entry, such as through the use
of automated systems, optical character recognition, and importing data directly from files.
One way to minimize potential trauma from keyboard work is to find ways to avoid key-
board tasks. The other methods are likely to improve productivity in addition to reducing
risk of repeated motion disorders.
Maintainability
Too often designers think of normal use and operation of equipment and they forget the tasks related to maintenance and repair.
Designs that incorporate maintainability concepts will reduce errors during mainte-
nance activities and help prevent unnecessary damage to components because workers
cannot see or reach into areas where work is carried out. Access points and panels should
be convenient and large enough for the work involved. Small holes are needed for hands
and arms; large ones for putting the head, shoulders, or entive body into a compartment.
There should be viewing ports as well. There are ways to code components so that one
does not confuse them. There are ways to design connectors and fittings so that the wrong
components are not placed in the wrong locations. References listed in the bibliography
provide insight into many techniques for incorporating human factors principles into main-
tainability. Many involve safety.
Keyboards have become extremely common control devices with the expansion in
the use of computers. There are models that have each half of the keyboard slightly rotated.
This feature helps position the keys in line with the arms and hands. Arms and hands
cannot be positioned perpendicular to a straight keyboard because of the width of the body.
To use a straight keyboard, one must bend the wrists, thus putting some strain on the wrists.
Workers should change tasks to reduce the intensity of keyboard data entry and find oppor-
tunities to stretch and relax the muscles and tendons involved in typing. Those involved
in data entry should look for ways to avoid keyboard data entry, such as through the use
of automated systems, optical character recognition, and importing data directly from files.
One way to minimize potential trauma from keyboard work is to find ways to avoid key-
board tasks. The other methods are likely to improve productivity in addition to reducing
risk of repeated motion disorders.
Maintainability
Too often designers think of normal use and operation of equipment and they forget the tasks related to maintenance and repair.
Designs that incorporate maintainability concepts will reduce errors during mainte-
nance activities and help prevent unnecessary damage to components because workers
cannot see or reach into areas where work is carried out. Access points and panels should
be convenient and large enough for the work involved. Small holes are needed for hands
and arms; large ones for putting the head, shoulders, or entive body into a compartment.
There should be viewing ports as well. There are ways to code components so that one
does not confuse them. There are ways to design connectors and fittings so that the wrong
components are not placed in the wrong locations. References listed in the bibliography
provide insight into many techniques for incorporating human factors principles into main-
tainability. Many involve safety.
การแปล กรุณารอสักครู่..