Background Statement for SEMI Draft Document #4604
Line Item Revisions to SEMI S8-0308, SAFETY GUIDELINES FOR
ERGONOMICS ENGINEERING OF SEMICONDUCTOR
MANUFACTURING EQUIPMENT
Note: This background statement is not part of the balloted item. It is provided solely to assist the
recipient in reaching an informed decision based on the rationale of the activity that preceded the
creation of this document.
Note: Recipients of this document are invited to submit, with their comments, notification of any
relevant patented technology or copyrighted items of which they are aware and to provide
supporting documentation. In this context, “patented technology” is defined as technology for
which a patent has issued or has been applied for. In the latter case, only publicly available
information on the contents of the patent application is to be provided.
This ballot contains eight line items for revisions to SEMI S8.
Line Item 1 is a change to the Supplier Ergonomics Success Criteria (SESC) in Appendix 1 and
the Supplier Ergonomics Success Criteria (SESC) checklist application guide in Related
Information 7 to identify what manual material handling tasks must be included in an S8
assessment.
Line Item 2 is a change to the Supplier Ergonomics Success Criteria (SESC) in Appendix 1 to
include acceptance criteria for the recommended manual material handling assessment methods
Line Item 3 is a change to the Supplier Ergonomics Success Criteria (SESC) in Appendix 1 and
section A2-1.8 in appendix 2 to identify when two person lifting is acceptable, and what
decrement to individual lifting capacity should be used for a two person assessment. This line
item also indicates that lifting by three or more people is unacceptable.
Line Item 4 is a change to appendix 2 to add items A2-1.9 and A2-1.10 to identify the correct
coupling classification in manual material handling situations where gloves are worn, and the
multiplier recommendation where shift duration of greater than 8 hours is likely.
Line Item 5 is a change to appendix 2 to add item A2-1.11 to identify what push or pull distance
should be used when actual distances are unknown.
Line Item 6 is a change to appendix 2 to add item A2-1.12 to identify when the assessor must
evaluate both the origin and destination of the lift with the NIOSH assessment
Line Item 7 is a change to appendix 2 to add items A2-1.13, A2-1.13.1, A2-1.13.2 and A2-1.13.3
to identify items the assessor can assume are available at the end user facility, and the assessment
requirements associated with them.
Line Item 8 is a change to appendix 2 Table A2-1 to improve format and correct errors.
This ballot will be discussed in the Ergonomics Task Force during the SEMICON West 2008
Standards Meetings (schedule tbd), and adjudicated at the NA EHS Committee meeting,
scheduled to be 0800 – to 1700 Pacific Time, Thursday, 17 July in San Francisco at the
SEMICON West 2008 Standards Meetings.
As this is a technical ballot, all votes must be submitted to SEMI in accordance with the
Regulations. Please forward a courtesy copy of any comments or rejections to Mark Harralson at
mark.harralson@intel.com.
Safety Checklist for SEMI Draft Document #4604
Title: Line Item Revisions to SEMI S8-0308, SAFETY GUIDELINES FOR
ERGONOMICS ENGINEERING OF SEMICONDUCTOR
MANUFACTURING EQUIPMENT
Developing/Revising Body
Name/Type:
Technical Committee:
Region:
Ergonomics Task Force
Environmental Health and Safety
North America
Leadership
Position
Last
Leader
Harralson
Leader
Macklin
Author/Editor*
Checklist Author*
First
Mark
Ron
Affiliation
Intel
* Only necessary if different from leaders
Documents, Conflicts, and Consideration
Safety related codes, standards, and practices used in developing the safety guideline, and the
manner in which each item was considered by the technical committee
None.
Known inconsistencies between the safety guideline and any other safety related codes,
standards, and practices cited in the safety guideline
None.
Other conflicts with known codes, standards, and practices or with commonly accepted safety
and health principles to the extent practical
None.
Participants and Contributors
Last
First
Affiliation
Harralson
Macklin
Kelso
Schwab
Giles
Larsen
Werner
Hayford
Mark
Ron
Dan
Paul
Andy
Sean
Steve
James
Intel
Earthtech
TI
Intertek
AMEC
Intel
Semitool
The content requirements of this checklist are documented in Section 14.2 of the Regulations
Governing SEMI Standards Committees.
Semiconductor Equipment and Materials International
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DRAFT
SEMI Draft Document #4604
Line Item Revisions to SEMI S8-0308, SAFETY GUIDELINES FOR
ERGONOMICS ENGINEERING OF SEMICONDUCTOR
MANUFACTURING EQUIPMENT
For all line items below, additions are underlined, deletions are struckthrough.
For Line Items 4, 5, 6, and 7, the numbering shows the intended order of the additions to A2-1.
Line Item 1 – Improved definition of what analyses are required
Table A1-1 Supplier Ergonomic Success Criteria Checklist
Section
1
1.1
Indicator
Acceptance Criteria
Metric Units (US Customary Units)
Actual
Conforms/Does
Not Conform/
Not Applicable
Manual Material Handling
Potentially hazardous manual material handling
tasks performed as part of operations,
maintenance, or service are analyzed utilizing
appropriate procedures.
Analysis and results documentation.
Table A2-2, Appendix 2, or the
equivalent, should be used to
document 2 hand lift/lower analysis.
Analysis is required for all lifting, puhing,
pulling and carrying for all operations,
maintenance and service tasks regardless of task
frequency except as noted below.
NOTE 1: Analysis is not required for two hand
lifting or lowering tasks where the object being
handled weighs less than 22.2 N (5 lbf);
OR, the object weighs less than 44.5 N (10 lbf)
and the anticipated frequency is less than 1 lift
every 5 minutes.
Note 2; Manual lifts do not have to be assessed
if a mechanical assist is provided for the task.
The assist must be available for the assessment
and it’s use must be assessed for compliance
with this document.
Note 3: Manual material handling activities
associated with initial equipment installation or
equipment movement and re-installation are not
assessed.
See Appendix 2 for further information.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Document Number: 4604
Date: 3/9/2016
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DRAFT
Table R7-1 Supplier Ergonomic Success Criteria Checklist Applications Guide
Section 1: Manual Material Handling
Section
1.1
Indicator
Potentially hazardous manual material handling tasks performed as part of operations, maintenance, or service are
analyzed utilizing appropriate procedures.
NOTE 1: Analysis is not required for two hand lifting or lowering tasks where the object being handled weighs less
than 22.2 N (5 lbf);
OR, the object weighs less than 44.5 N (10 lbf) and the anticipated frequency is less than 1 lift every 5 minutes.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Document Number: 4604
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DRAFT
Line Item 2 – Addition of specific acceptance criteria
Table A1-1 Supplier Ergonomic Success Criteria Checklist
Section
1
1.1
Indicator
Acceptance Criteria
Metric Units (US Customary Units)
Actual
Conforms/Does
Not Conform/
Not Applicable
Manual Material Handling
Potentially hazardous manual material handling
tasks performed as part of operations,
maintenance, or service are analyzed utilizing
appropriate procedures.
NOTE: Two hand lifting or lowering tasks
should be analyzed:
if the object being handled weighs more than
44.5 N (10 lbf);
OR, if the object weighs more than 22.2 N
(5 lbf) and the anticipated frequency is greater
than 1 lift every 5 minutes.
See Appendix
2 for further information.
Weight of the object must not exceed
the NIOSH recommended weight of
lift (RWL) for lifting or lowering.
Weight of the object must not exceed
the psychophysical maximum
acceptable weight of lift (MAWL) for
lifting, lowering or carrying for the
25th percentile female.
Required force must not exceed
recommended psychophysical
maximum force for pushing or pulling
for the 25thpercentile female.
Force requirements must not result in
greater than 770 lbs compressive force
at L4/L5, or result in accommodation
of less than 25 percent of females for
strength capability.
Analysis and results documentation.
Table A2-2, Appendix 2, or the
equivalent, should be used to
document 2 hand lift/lower analysis.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Document Number: 4604
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DRAFT
Line Item 3 – Identification of acceptable multi-person handling tasks
Table A1-1 Supplier Ergonomic Success Criteria Checklist
Section
1
1.1
Indicator
Acceptance Criteria
Metric Units (US Customary Units)
Actual
Conforms/Does
Not Conform/
Not Applicable
Manual Material Handling
Potentially hazardous manual material handling
tasks performed as part of operations,
maintenance, or service are analyzed utilizing
appropriate procedures.
NOTE: Two hand lifting or lowering tasks
should be analyzed:
if the object being handled weighs more than
44.5 N (10 lbf);
OR, if the object weighs more than 22.2 N
(5 lbf) and the anticipated frequency is greater
than 1 lift every 5 minutes.
See Appendix
2 for further information.
Analysis and results documentation.
Table A2-2, Appendix 2, or the
equivalent, should be used to
document 2 hand lift/lower analysis.
A two person lift is only acceptable
for maintenance or service activities.
Refer to section A2-1.8 for more
information regarding two person lift
assessment.
A2-1.8 For a 2-person handling task, there should be adequate coupling locations and adequate body clearance for
the activity. Analyses need to be performed and documented for each person lifting if any of the parameters
(e.g., horizontal reach) are different. In a two person lifting task, each person lifting is 93% efficient. Lifting by three
or more people is not acceptable.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Document Number: 4604
Date: 3/9/2016
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Phone:408.943.6900 Fax: 408.943.7943
DRAFT
Line Item 4 – Identification of correct coupling classification where gloves are used, and decrement
recommendation where shift duration of greater than 8 hours is likely.
Add the following paragraphs at the end of A2-1:
A2-1.9 In any situation where standard clean room gloves are worn, the correct coupling classification for lifting or
pulling is poor. Coupling classification for a pushing task is up to the discretion of the assessor.
A2-1.10 When using the NIOSH equation and it is likely the lifting duration will be greater than 8 hours, the
assessor may use the multiplier recommended for psychophysical analysis (0.92 for 12 hours per Mital 1997) at their
discretion.
Line Item 5 – Identification of psh/pull distance to be used when actual distance is unknown.
Add the following paragraphs at the end of A2-1:
A2-1.11 When using psychophysical analysis for a push/pull activity, and the push/pull distance is not known (i.e.
moving a cart to parts clean) the assessor should use the maximum distance available in the table.
Line Item 6 – Identify when the assessor must evaluate both the origin and destination of the lift with the
NIOSH assessment
Add the following paragraphs at the end of A2-1:
A2-1.12 When usjng the NIOSH assessment technique, if the lift requires precision placement at the destination,
both the origin and destination of the lift must be assessed. Precision placement is defined as any time when the
object must be decelerated as it is placed. This would be the case with any object that is fragile (i.e. glass, electronics,
etc.), or must be placed in a location with less than 3cm of overall tolerance.
Line Item 7 – Identification of items the assessor can assume are available at the end user facility, and
assessment requirements associated with them
Add the following paragraphs at the end of A2-1:
A2-1.13 The assessor may assume that only the following items are availale to facilitate MMH activities. The
assessor may not assume that any other device (i.e. hoists, jigs, fixtures, etc.) are available to assist in the activity.
The assist must be available for the purpose of the evaluation. It is unacceptable to carry items up or down the steps
on a ladder or ladder platform.
A2-1.13.1 An A-frame ladder
A2-1.13.2 A ladder platform (elevated work platform) that is commercially available. The assessor must identify the
needed height, and confirm that the platform is commercially available.
A2-1.13.3 A fixed height cart that is commercially available. The assessor must identify the needed height, and
confirm that the platform is commercially available.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Document Number: 4604
Date: 3/9/2016
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Phone:408.943.6900 Fax: 408.943.7943
DRAFT
Line Item 8 – Changes to the analysis tool selection table to correct errors
Replace Table A2-1 with a new table as shown:
Old Table
Table A2-1 Criteria to determine appropriate MH analysis tool(s)
MH Type
“If” Condition
NIOSH (1991)
Bio Model
Psycho Physical
2 Hand Lift or Lower
F <1 lift/5 minutes



F >1 lift/5 minutes

F >9 lifts/minute

Twisting Occurs

Handle Design is an Issue


 (3D)


Limited Headroom During Lift

Work Duration >8 hours
1 Hand Lifts
1 or 2 Hand Carry
1 or 2 Hand Push/Pull
Lift/Lower in NonStandard Postures

Load Placement Clearance is an Issue

Load Asymmetry is an Issue


 (3D)
Length of Object Measured in Frontal Plane of
Body >26"
Exposure to Heat Stress
 (3D)
Posture = Standing




Posture = Kneeling or Seated

NOTE: Carry is Operationally Defined as
Horizontal Movement of Load >7 feet
Distance <7 feet and F <1 Push/Pull/5 minutes



Distance >7 feet and F >1 Push/Pull/5 minutes

Push/Pull Task Requires Significant Sustained
Forces (e.g., slide box along floor)
Kneeling, Sitting, or Lying


#1 Under Bio Model, 3D indicates that only a 3-dimensional biomechanical model is appropriate for the task condition.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Phone:408.943.6900 Fax: 408.943.7943
DRAFT
New Table
Table A2-1 Criteria to determine appropriate MMH analysis tool(s)
MMH task type
Two handed
lift/lower
Single-handed
lift/lower
Lift/lower in nonstandard postures
Carrying
Push/pull
Task conditions
NIOSH
Biomechanical
Psychophysical
Infrequent lifting/lowering tasks
(less than once per five minutes)
P
P
P
Frequent lifting/lowering
(more than once per five minutes)
P
P
Extra considerations involved:
 Work area has limited headroom
 Load asymmetry is an issue
P
P
Infrequent lifting/lowering tasks
(less than once per five minutes)
P
P
Frequent lifting/lowering tasks
(more than once per five minutes)
P
P
Sitting & kneeling
P
Lying tasks
P
Carrying tasks
P
Infrequent & short distance
 Distances up to 2.1m (7 feet)
 Frequency less than once per five
minutes
Frequent and/or intermediate distance
 Distances up to 60m (200 feet)
 Frequency more than once per five
minutes
P
P
P
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
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Document Number: 4604
Date: 3/9/2016
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Phone:408.943.6900 Fax: 408.943.7943
DRAFT
SEMI S8-0308
SAFETY GUIDELINES FOR ERGONOMICS ENGINEERING OF
SEMICONDUCTOR MANUFACTURING EQUIPMENT
{No changes are proposed by this ballot to the main body of SEMI S8. Therefore, it has been omitted from the
ballot in the interest of brevity. If you need a copy in order to vote, please contact SEMI Staff.}
APPENDIX 1
SUPPLIER ERGONOMIC SUCCESS CRITERIA (SESC)
NOTICE: The material in this appendix is an official part of SEMI S8 and was approved by full letter ballot
procedures on (date).
Table A1-1 Supplier Ergonomic Success Criteria Checklist
Section
1
1.1
Indicator
Acceptance Criteria
Metric Units (US Customary Units)
Actual
Conforms/Does
Not Conform/
Not Applicable
Manual Material Handling
Line Item 1 (part 1 of 2)
Line Item 2
Potentially hazardous manual material handling Weight of the object must not exceed
tasks performed as part of operations,
the NIOSH recommended weight of
maintenance, or service are analyzed utilizing
lift (RWL) for lifting or lowering.
appropriate procedures.
Analysis is required for all lifting, puhing,
pulling and carrying for all operations,
maintenance and service tasks regardless of task
frequency except as noted below.
NOTE 1: Analysis is not required for two hand
lifting or lowering tasks where the object being
handled weighs less than 22.2 N (5 lbf);
OR, the object weighs less than 44.5 N (10 lbf)
and the anticipated frequency is less than 1 lift
every 5 minutes.
Note 2; Manual lifts do not have to be assessed
if a mechanical assist is provided for the task.
The assist must be available for the assessment
and it’s use must be assessed for compliance
with this document.
Weight of the object must not exceed
the psychophysical maximum
acceptable weight of lift (MAWL) for
lifting, lowering or carrying for the
25th percentile female.
Required force must not exceed
recommended psychophysical
maximum force for pushing or pulling
for the 25thpercentile female.
Force requirements must not result in
greater than 770 lbs compressive force
at L4/L5, or result in accommodation
of less than 25 percent of females for
strength capability.
Analysis and results documentation.
Table A2-2, Appendix 2, or the
Note 3: Manual material handling activities
equivalent, should be used to
associated with initial equipment installation or document 2 hand lift/lower analysis.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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Indicator
Acceptance Criteria
Metric Units (US Customary Units)
Actual
Conforms/Does
Not Conform/
Not Applicable
equipment movement and re-installation are not Line Item 3 (part 1 of 2)
assessed.
See Appendix 2 for further information.
A two person lift is only acceptable
for maintenance or service activities.
Refer to section A2-1.8 for more
information regarding two person lift
assessment.
{No changes are proposed by Document 4604 to the remainder of this section of SEMI S8. Therefore, it has been
omitted from the ballot in the interest of brevity. If you need a copy in order to vote, please contact SEMI Staff.}
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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LETTER (YELLOW) BALLOT
Section
DRAFT
Document Number: 4604
Date: 3/9/2016
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Phone:408.943.6900 Fax: 408.943.7943
DRAFT
APPENDIX 2
LIFTING, STRENGTH, AND MATERIALS HANDLING
NOTICE: The material in this appendix is an official part of SEMI S8 and was approved by full letter ballot
procedures.
A2-1 General Considerations
A2-1.1 For recommended guidelines regarding the percentage of a user's maximum grip strength to be exerted in
execution of a task see Related Information 1, Table R1-3.
A2-1.2 Where standard product or containers are to be handled at equipment load and unload stations,
mechanization should be considered for orientation and handling. Where manual handling is necessary, the design
should reduce extended reaching, lifting, pulling, and awkward postures. Simultaneous lifting and twisting should be
avoided. Load, unload, and lift over points should be located such that the floor to hand height is 84–107 cm
(33–42 in.); optimal design target is 102 cm (40 in.).
A2-1.3 Handles or cutouts should be designed to facilitate use of the power grip (e.g., similar to that used to hold a
pistol). Avoid handles that require pinch grips or awkward postures. Handles should allow carrying close to the body.
A2-1.4 Lifting and handling tasks performed in a stooping position should be avoided. Stooping occurs when the
vertical material handling height is less than 84 cm (33 in.), or the horizontal reach distance is greater than 46 cm
(18 in.) in front of body.
A2-1.5 For two handed push/pull activities the floor to hand height should be between 97 cm (38 in.) and 112 cm
(44 in.).
A2-1.6 Consideration should be given to the standing surface to minimize the risk of slips and falls.
A2-1.7 Awkward postures should be avoided. Refer to Related Information 1, Table R1-2 for a list of
recommended ranges of awkward postures to avoid.
Line Item 3, part 2 of 2:
A2-1.8 For a 2-person handling task, there should be adequate coupling locations and adequate body clearance for
the activity. Analyses need to be performed and documented for each person lifting if any of the parameters
(e.g., horizontal reach) are different. In a two person lifting task, each person lifting is 93% efficient. Lifting by three
or more people is not acceptable.
Line Item 4:
A2-1.9 In any situation where standard clean room gloves are worn, the correct coupling classification for lifting or
pulling is poor. Coupling classification for a pushing task is up to the discretion of the assessor.
A2-1.10 When using the NIOSH equation and it is likely the lifting duration will be greater than 8 hours, the
assessor may use the multiplier recommended for psychophysical analysis (0.92 for 12 hours per Mital 1997) at their
discretion.
Line Item 5:
A2-1.11 When using psychophysical analysis for a push/pull activity, and the push/pull distance is not known (i.e.
moving a cart to parts clean) the assessor should use the maximum distance available in the table.
Line Item 6:
A2-1.12 When usjng the NIOSH assessment technique, if the lift requires precision placement at the destination,
both the origin and destination of the lift must be assessed. Precision placement is defined as any time when the
object must be decelerated as it is placed. This would be the case with any object that is fragile (i.e. glass, electronics,
etc.), or must be placed in a location with less than 3cm of overall tolerance.
This is a draft document of the SEMI International Standards program. No material on this page is to be construed as an offi cial or adopted standard. Permission is granted to
reproduce and/or distribute this document, in whole or in part, only within the scope of SEMI International Standards committee (document development) activity. All other
reproduction and/or distribution without the prior written consent of SEMI is prohibited.
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DRAFT
Line Item 7:
A2-1.13 The assessor may assume that only the following items are availale to facilitate MMH activities. The
assessor may not assume that any other device (i.e. hoists, jigs, fixtures, etc.) are available to assist in the activity.
The assist must be available for the purpose of the evaluation. It is unacceptable to carry items up or down the steps
on a ladder or ladder platform.
A2-1.13.1 An A-frame ladder
A2-1.13.2 A ladder platform (elevated work platform) that is commercially available. The assessor must identify the
needed height, and confirm that the platform is commercially available.
A2-1.13.3 A fixed height cart that is commercially available. The assessor must identify the needed height, and
confirm that the platform is commercially available.
A2-2 Selecting and Using the Appropriate MMH Analysis Tool(s)
A2-2.1 Three general MMH evaluation tools are identified in the following matrix. The three tools are the
“Application manual for the Revised NIOSH Lifting Equation” lifting equation, biomechanical models, and
psychophysical capacity tabular data. Table A2-1 was designed to assist in determining which analysis tools are
appropriate for a particular task. For each unique characteristic of the task, a checkmark in the analysis tool column
indicates that the analysis tool is appropriate. If there is any aspect of the task that does not show a check mark in a
particular tools column, that analysis tool is not appropriate to evaluate the task. Note that in many situations
multiple tools are appropriate. In situations where the 1991 NIOSH equation is appropriate, the assessor should use
it, because it typically will provide the most conservative results. In other situations, the assessor may use any of the
appropriate tools.
A2-2.2 Correct application of the 1991 NIOSH equation is described in Waters, Thomas, et al., Application manual
for the Revised NIOSH Lifting Equation, U.S. Department of Health and Human Services (NIOSH), Cincinnati, OH,
1994.
A2-2.3 There are many sources of psychophysical data. One such source is A. Mital, A.S. Nicholson, M.M. Ayoub,
A Guide to Manual Materials Handling, Taylor and Francis, London, 1993.
A2-2.4 Biomechanical analysis can be completed using biomechanical modeling software.
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Line Item 8:
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Line Item 8 (continued):
Table A2-1 Criteria to determine appropriate MMH analysis tool(s)
MMH task type
Two handed
lift/lower
Single-handed
lift/lower
Lift/lower in nonstandard postures
Carrying
Push/pull
Task conditions
NIOSH
Biomechanical
Psychophysical
Infrequent lifting/lowering tasks
(less than once per five minutes)
P
P
P
Frequent lifting/lowering
(more than once per five minutes)
P
P
Extra considerations involved:
 Work area has limited headroom
 Load asymmetry is an issue
P
P
Infrequent lifting/lowering tasks
(less than once per five minutes)
P
P
Frequent lifting/lowering tasks
(more than once per five minutes)
P
P
Sitting & kneeling
P
Lying tasks
P
Carrying tasks
P
Infrequent & short distance
 Distances up to 2.1m (7 feet)
 Frequency less than once per five
minutes
Frequent and/or intermediate distance
 Distances up to 60m (200 feet)
 Frequency more than once per five
minutes
P
P
P
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Table A2-2 Two Hand Lift/Lower Manual Material Handling Analysis Documentation
NIOSH Analysis
Horizontal
(origin)
measure
Horizontal
(destination)
measure
Vertical
Distance
Asymmetry
(destination)
measure
Frequency
Duration
Coupling
measure
Asymmetry
(origin)
measure
measure
measure
measure
measure
multiplier
multiplier
multiplier
multiplier
multiplier
multiplier
multiplier
multiplier
multiplier
Recommended
weight limit
Lifting index
Precision
placement
req.
Psychophysical Analysis
Box size
Range of
lift
Frequency
MAWL
Headroom
limitation
measure
Load
clearance
measure
Load
asymmetry
measure
Asymmetry
multiplier
multiplier
multiplier
Coupling
measure
Work
duration
measure
multiplier
multiplier
multiplier
Adjusted
MAWL
Lifting
index
measure
Conclusions
one person lift
Recommended
weight limit
Lifting index
two person lift
Recommended
weight limit
Lifting index
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APPENDIX 3
HANDLE DESIGN DIAGRAMS
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ANTHROPOMETRIC RESOURCE DATA
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WORKSTATION DESIGN
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DESIGN FOR MAINTAINABILITY AND SERVICEABILITY
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HAZARD ALERTS, LABELS, AND ALARMS
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CONTROLS AND DISPLAYS
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USER COMPUTER INTERFACE
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SEMI S8 SUPPLIER ERGONOMIC SUCCESS CRITERIA (SESC)
CHECKLIST APPLICATIONS GUIDE
NOTICE: This related information is not an official part of SEMI S8 and was derived by the EHS Ergonomics
Task Force. This related information was approved for publication by full letter ballot on September 3, 2003.
R1-1 Purpose
R1-1.1 This section is provided as a companion to the SEMI S8 Supplier Ergonomic Success Criteria (SESC)
checklist as an aid to help equipment designers and evaluators understand how to apply the checklist when designing
equipment or assessing machine designs or prototypes.
R1-1.2 This applications guide follows the numbering scheme of the SESC checklist. When appropriate, notes,
illustrations and diagrams have been added to clarify each item.
NOTE 1: For the purpose of this document, “weight” is defined as the force of gravity and units are specified in Newtons (N),
and pound-force (lbf.). One lbf. is the force of gravity on a one-pound mass (lb.) and 9.81 N is the force of gravity on a onekilogram mass (kg.).
Table R1-1 Supplier Ergonomic Success Criteria Checklist Applications Guide
Section 1: Manual Material Handling
Section
1.1
Indicator
Line Item 1, part 2 of 2:
Potentially hazardous manual material handling tasks performed as part of operations, maintenance, or service are
analyzed utilizing appropriate procedures.
NOTE 1: Analysis is not required for two hand lifting or lowering tasks where the object being handled weighs less
than 22.2 N (5 lbf);
OR, the object weighs less than 44.5 N (10 lbf) and the anticipated frequency is less than 1 lift every 5 minutes.
See Appendix 2 for further information.
Acceptance criterion: Analysis and results documentation. Table A2-2, Appendix 2, or the equivalent, should be used to
document 2-hand lift/lower analysis.
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NOTICE: SEMI makes no warranties or representations as to the suitability of the safety guideline(s) set forth
herein for any particular application. The determination of the suitability of the safety guideline(s) is solely the
responsibility of the user. Users are cautioned to refer to manufacturer’s instructions, product labels, product data
sheets, and other relevant literature respecting any materials or equipment mentioned herein. These safety
guidelines are subject to change without notice.
By publication of this safety guideline, Semiconductor Equipment and Materials International (SEMI) takes no
position respecting the validity of any patent rights or copyrights asserted in connection with any item mentioned in
this safety guideline. Users of this safety guideline are expressly advised that determination of any such patent
rights or copyrights, and the risk of infringement of such rights are entirely their own responsibility.
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