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NOTE: The comments in the column titled “Comments” are not intended to alter the requirements of the S2 guidelines. Instead, these comments are provided by the Task Force members with the
intent of identifying the similarities and differences between those technical requirements in S2-93A and those required for KOSHA “S” Marking.
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that are confusing to operate; (b) displays that are difficult to read or
understand; (c) lifting of heavy or bulky components; (d) repetitive
motion; (e) static and/or awkward postures; (f) poor access, inadequate
clearance, and excessive reaching, bending, or stooping.
14.4 Operability
14.4.1 System controls and displays should promote ease of use.
Equipment design should consider both routine and non-routine (e.g.,
emergency or fault) operation. Risk to operators should be minimized by
decreasing both the likelihood and consequence of procedural errors.
14.4.2 Visual and/or auditory signals should alert operators to conditions
that are unsafe or require immediate intervention.
Prompt and consistent feedback should be provided to indicate system
status, control inputs, and changes in system condition.
Article 45 (Cleaning of internal parts)
The machinery must be designed and constructed in such a way that it is
possible to clean internal parts which have contained dangerous
substances or preparations without entering them; any necessary
unblocking must also be possible from the outside. If it is absolutely
impossible to avoid entering the machinery, the manufacturer must take
steps during its construction to allow cleaning to take place with the
minimum of danger.
14 Ergonomics/Human Factors
14.1 General - Process equipment should be designed to prevent
personal injury and equipment damage and to minimize procedural
errors. Equipment design features should ensure that operator workload,
information processing requirements, and physical demands do not
exceed user capabilities or compromise safety. The following sections
provide general guidelines that are further explained or detailed in SEMI
S8 and applicable references in Appendix 2.
14.2 Ergonomic Hazards - Ergonomic hazards should be designed out
or otherwise reduced to the maximum extent practicable. Ergonomic
hazards exist whenever the system design or installation results in task
demands that exceed the information processing and/or physical
capabilities of trained personnel. Hazards may result from: (a) controls
that are confusing to operate; (b) displays that are difficult to read or
understand; (c) lifting of heavy or bulky components; (d) repetitive
motion; (e) static and/or awkward postures; (f) poor access, inadequate
clearance, and excessive reaching, bending, or stooping.
14.3 Human Characteristics - Equipment should be designed to fit the
physical characteristics of 90 percent of the user population (from 5th
percentile Asian female through 95th percentile American male). User
population design considerations include: (a) ensuring that frequently
performed physical task requirements are located within the functional
reach envelope of small operators; (b) providing sufficient access and
clearance for large operators; (c) ensuring that manual handling
requirements are within the strength capability of all operators; (e)
locating displays for ease of viewing. Control and display operation
should be compatible with user expectations (e.g., behavioral