List problems in design that you have encountered that you think could be solved

Question

List problems in design that you have encountered that you think could be solved by a Human factors specialist. Describe why each is a problem. c. A problem that involves movement characteristics (e.g., the tendency of secretaries to develop carpal tunnel syndrome, a disorder caused by damage to the median nerve where it passes through the carpal tunnel in the wrist, when wrist support is not provided for typing
List problems in design that you have encountered that you think could be solved by a Human factors specialist. Describe why each is a problem. c. A problem that involves movement characteristics (e.g., the tendency of secretaries to develop carpal tunnel syndrome, a disorder caused by damage to the median nerve where it passes through the carpal tunnel in the wrist, when wrist support is not provided for typing
c. A problem that involves movement characteristics (e.g., the tendency of secretaries to develop carpal tunnel syndrome, a disorder caused by damage to the median nerve where it passes through the carpal tunnel in the wrist, when wrist support is not provided for typing

Explanation / Answer

There are many situations in design that could done better with help of Human Factors Specialist. The machines designed (however powerful and intricate they may be) are ultimately controlled by humans. This leads to many situations in design engineering.

For example in case of working on machines like presses, a method to pull the operators hands away from the work area especially when dies are closing (often with full force). Similarly restraints to hold the operator from accidently keeping his hand in hazardous area. Another method could to keep both the hands of the operator busy in controlling the knobs elsewhere (not on the die working area) on machine.   

Position of Control Levers/switches/handles: They shall be placed such that operator can reach them in simple and quick way. Two opposing type of functions shall not be juxtaposed so that the operator shall not get confused. The force to operate levers, knobs, switches shall not cause operator fatigue.

For example an AC switch placed awkwardly in an automobile could divert drivers’ attention leading to accidents. Similarly entertainment console (on modern automobiles) pursuing seductive attention from drivers could be potentially hazardous. These parameters could be well dealt by Human Factors Specialist.

Similarly vibration and noise have much negative impact on the human efficiency. A motor cycle having too much vibration at the handle could lead to numbness and even loss of control by the drivers. Workers operating near heavy machines making noise over 85-90dBA cannot work for long hours. They need to be rested after 4 hours. They may be supplied with personal protective devises.

There are many levers which may require awkward hand moments, bends and high forces. These need to be avoided.

There are situation where pull OR push type buttons to be provided. For examples emergency stops should always be push type. Emergency doors should always be push type to open to atmosphere. There certain situations where pull is more efficient. For example, an emergency stop in a railway compartment is much easily and conveniently designed to pull type. There are situations, when unattended, the machine should safe stop rather continue with operation.

There are situations where Fail-Safe and Safe-Life Designs to be preferred. These are better evaluated with help of Human Factors Specialist.

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