Ergonomics 5th 95th percentile


Anthropometry Sustainable Ergonomics System

  1. Ergonomics software, ergonomic assessment, consulting and training. Concept of 5th and 95th percentile. It is conventional to refer to the 5th percentile (short) female and the 95th percentile (tall) male to establish a range of human dimensions that accommodates 90% of the population
  2. The values given are for the 5th and 95th percentile of the range. The data should be applied in the following manner: a. 5th Percentile - Use the 5th percentile limit when personnel must position their body to operate or maintain equipment. b. 95th Percentile - Use the 95th percentile limit when designing to accommodate a full range of.
  3. b. Myth that designing for 5-95th percentile - designing to include the ranges between the 5th and 95th percentiles of anthropometric data doesn't fit everyone. There are two misunderstandings: (1) 5 - 95 percentile is only 90% - 5-95% _ 95% of people, it's only 90%! If you design for 90%, you'll fit 9 out of 10, 90 out of 100, 900 out of 1000.
  4. e the percentile value, a set of variables is divided into 100 equal groups. In ergonomics, the 95th percentile is a statistical value often used to deter
  5. Percentile Values in Centimeters 5th Percentile 95th Percentile Ground Troops Aviators Women Ground Troops Aviators Women Seated Body Dimensions 14 Vertical arm reach, sitting 128.6 134.0 117.4 147.8 153.2 139.4 15 Sitting height, erect 83.5 85.7 79.0 96.9 98.6 90.9 16 Sitting height, relaxed 81.5 83.6 77.5 94.8 96.5 89.
  6. Ergonomics is a relatively new science and can be described as 'the science of looking at how people that lies between the 5th and 95th percentiles. To design for people who fall outside this range would be very impractical. People in the 1st to 5th percentile area ar
  7. Adjustment ranges are not arbitrary, but instead are intentional to meet the needs of the 5th to 95th percentile. We use the latest anthropometric data to understand specific measurements that are related to ergonomic chair design, going beyond simply looking at overall height and weight

Anthropometry and Biomechanics - Nas

Best design practice targets the 5th percentile female hand to the 95th percentile male hand to accommodate the physical range of grasp, motion, and flexion. Handheld and hand-intensive design for precision instruments must accommodate a range of 1.75 in. in hand length and 1 in. in hand width Ergo-link™ CAD Mannequin Features: • CAD Mannequins - SolidWorks. • Quality visual human characteristics. • U.S. 5th Female thru 95th Male percentile range. • Statistically dimensioned to U.S. military population data. • Articulate at each joint (including head, neck, fingers, etc.) • Primary & secondary vision cones and hence be saleable to, drivers of a range of statures from the 5th percentile female to the 95th percentile male. Apart from the mandated requirement that your roll hoops meet the Percy rule (B3.9.3), covering this range of statures will mean attention to driver visibility, steering wheel and shifter. Extreme Ergonomics - Ergonomic Chairs for Tall People and Short People. Posted by Human Solution on Sep 30th 2015. Most office chairs are designed to accommodate people within the 5th to 95th height percentile. This range covers the 5th percentile female at 60.2 inches to the 95th percentile male at 73.6 inches

Ergonomics of a tower crane cabin & its effects on the

Anthropometrics and design - Cornell University Ergonomics We

What is the 95th Percentile? - Definition from

  1. imum interior height and length for fully or partially enclosed workstations depend on the operators' size, seated posture, seat design, and control inputs required. The illustrations below are for four seating space envelopes for 95th-percentile male and 5th-percentile female operators in 42-in (106.7-cm) and 22-in (55.9-cm) cab heights (1
  2. In ergonomics it is normally the extremes that we are interested in, because that is where any given aspect of a design will start to not fit. The percentage of people who are smaller than a given size is called a percentile, and typically designs are specified to fit from 1st/2nd/5th percentile to 95th/98th/99th
  3. imum dimensions) body dimensions of the targeted population are.
  4. ation. No
  5. KEY TERM for students: PERCENTILE - A point on a graph showing the probability of human sizes for a selected group. When using anthropometric data for the average sizes of the human body, the appropariate size can be found by looking at the average between the 95th percentile of males and 5th percentile of females.. Encourage students to use tables like the example below and to calculate the.

Appendix B: Ergonomics Dat

  1. These were sized for both males and females falling in the 5th percentile, 50th percentile and 95th percentile groupings. T h e stresses developed in the ergonomically designed chisel handle while in use were analysed to verify the validity of the design. Rounded end 5th 50th 95th Figure 1 Chisel with ergonomic handle Adults Males 7.9 8.6 9.
  2. Percentiles and Percentile Ranges. Term: Percentile range: That proportion of a population with a dimension at or less than a given value. You need to be able interpret percentile tables for user populations in a design context. Consider the 5th, 50th and 95th percentiles in particular, and percentile ranges such as 2.5th to 97.5th and 5th to 95th
  3. 5th - 95th percentile. Define anthropocentric. Aspect of ergonomics that deals with body measurements. -size. -strength. -physical capacity. Involves using body sizes to improve products, systems or environments. List two items what would be designed using the 50th percentile. Washing machine, stove
  4. A full-scale prototype of the Multi-Position Ergonomic Computer Workstation, which had 19 degrees of freedom and could accommodate from 5th percentile female to 95th percentile male human size, was designed and developed. Changing the working positions of the prototype was easy to learn
  5. Some examples of products that could cause injury over a period of time due to poor ergonomics are: answer choices . Car seat. Chair. Computer keyboard. Computer mouse 5th percentile <p>95th percentile </p> <p>5th percentile</p> answer explanation . Tags: Topics: Report an issue.

The tool currently consists of a 5th percentile female and 95th percentile male mannequin that are solid models developed in SOLIDWORKS; they can be readily articulated to the range of human motion intended to locate and position controls and displays within appropriate/selective physical reach Most work chairs are designed on a middle-out model of anthropometrics intended to accommodate the middle 95 percent of the user population: from the 5th-percentile female to the 95th- percentile male. However, as British ergonomist Stephen Pheasant points out, there is no true 5th- or 95th-percentile person; someone who is at the 95th. It is common to design for all falling between the 5th percentile of females to the 95 th thpercentile of males. The 5 to the 95 Percentile range accommodates 90% of the target population as represented in the diagram below. Figure 3.1: The relative sizes of different percentile adult humans (from All Steel Ergonomics and Design, A Reference Guide

Anthropometrics uses a percentile range with most furniture being designed to suit everyone from the 5th percentile to the 95th percentile. This means that the 5th% female value for a particular dimension (e.g. sitting height) usually represents the smallest measurement for design in a population. Conversely, a 95th% male value may represent. The question is: What is 95th percentile SAE ergonomics? SAE is the Society of Automotive Engineers, they have a set of standards for anthropometry (body measurements) that are used by automotive industry to design vehicles. SAE utilizes the CAESA.. Also, the 95th percentile values for 7 year old male and 95th percentile female for statue are the same (30.84 kg). It should be noted that when accommodating for 90% of the population, the values of the lowest 5th percentile and the values of the highest 95th percentile should be considered for stature and weight Palm length Male percentile. 5th (9.80 cm) 50th (10.70 cm) 95th (11.60 cm) Female percentile. 5th (8.90 cm) 50th (9.70 cm) 95th (10.50 cm

The imported view points (95th percentile male, 5th percentile female, etc.) per vehicle are listed in the list field. Select a line to edit the values in the spin boxes. Then click the update button. Add View Point: Adds a view point to the list. Update View Point: Updates the selected view point to the spin box values 95th percentile user. REACH DISTANCES In order to maintain neutral body posture it is critical that the location of the touchscreen does not require a user to lift the upper arm away from the torso to operate it. Allowing for the 5th percentile British user this means ideally not exceeding a reach distance of 405mm

PPT - Engineering Anthropometry PowerPoint Presentation

(choose all correct answers) Ergonomics in design focuses on how the design of a product. Design - Human Factors & Ergonomics - Part 1 DRAFT. 5th percentile users. the average users. the 95th percentile users. Tags: Question 5 . SURVEY . 45 seconds . Q. Capturing the user requirements should be done at the _____ stage of product. a) 95th percentile right leg strength of female b) 5th percentile right leg strength of female c) 5th percentile right leg strength of male • Body type with increased fat storage, a wide waist and a large bone structure, referred as a) Ectomorph b) Endomorph c) Mesomorph • Biomechanics is discussed unde In this paper, handles for two commonly used hand tools, the chisel and the off-set pliers, are designed using ergonomic principles. These were sized for both males and females falling in the 5th percentile, 50th percentile and 95th percentile groupings. The stresses developed in the ergonomically d Here we are providing the solution to meet the requirement of comfortable ergonomics position as per drivers wish for all kind of persons/drivers (5th percentile to 95th percentile) by providing the adjustable clutch pedal assembly with simple mechanism

If a 5th percentile female can reach 25 inches, then the rest of the population can reach that far, with the exception of the smallest 5 percent of the female population, Greenwald points out. By designing for this 5th percentile female and the 95th percentile male, 90 percent of the industrial population is accommodated For instance, to create a boundary value that addresses 90% of an adult population, the lower boundary would be based on the 5th percentile of female members of the population and the 95th percentile of males. The generally accepted boundary values for ergonomic designs in the workplace are the 5th and 95th percentile

Let's say you yourself are in the 95th percentile. That means 95% of the other values within the population fall below you and 5% are above you. You should consider each of the hand dimensions in the 95th percentile when choosing your handle. Anthropometrics vary database to database, depending on the people who were studied accommodate the 5th percentile female to the 95th percentile male. Preferred gaze angles have been found to be steeply downwards. To view a touch screen the angle of view should allow the angle of gaze to be within the range 30 +/- 15 degrees downwards, with the screen not closer than 250mm. At a focal distance of 1m the preferred downward gaz 95th percentile: a term commonly used to determine ergonomic boundary values. It means that the dimensions of an individual are greater than 95 percent of the male population, and 100 percent of the female population, since women are smaller than men as a population. At the 95th percentile, five out of every 100 individuals exceed the target value population, the 5th or 95th percentile value for each anthropometric dimension was determined following the rules of anthropometric design. Clearance criteria took the larger value; for example the seat width of the 95th percentile female was used, whereas the 'reach' was set by the 5th percentile female data


Most chairs are designed for the 5th to 95th percentile of the population. This helps explain why the average office chair height is not designed for a petite person. Sit as if you're on top a horse. When we sit in our office chairs for long periods of time, our lower body slowly forms into a slouched over posture Ergonomics is a relatively new science and can be described as 'The science of looking at how people relate to the products or systems that they use or come in to contact with.' Designers should ensure that their products will be able to be used by 5th to 95th percentile users. To design for people who do not fall in to the 5th to 95th. Simulation runs for the factorial analysis of ergonomic risk Gender Percentile Design L4/L5 Force % Capable Male 5th Basic 1556 97 Male 5th Handle-in-Shaft 1501 96 Male 5th Two Handles 1352 98 5th 95th Percentile Interaction Plot for L4/L5 Force Data Means Figure 8. Interaction factor plot for the compression force variabl To the left of the average, there is a point known as the 5th percentile, because 5% of the people (or 1 person in 20) is shorter than this particular height. The same distance to the right is a point known as the 95th percentile , where only 1 person in 20 is taller than this height

Ergonomics and Seating Allstee

  1. In other words, ergonomics is about fitting the work to fit the worker. When considering how to accommodate the aging workforce, it is as important as ever to match job demands to worker capabilities. Ergonomics and the Aging Workforce. Ergonomically correct design accounts for workers from the 5th percentile female to the 95th percentile male
  2. Typically, anthropometric data are used to design workstations that adjust to fit the smallest member of the population (the 5th percentile female) and the largest member of the population (the 95th percentile male). However, a majority of those left outside of this range are people with disabilities. This means ergonomics is situational
  3. This is the branch of ergonomics that deals with human dimensions. Data of peoples sizes, heights, etc are used to take into account the widest possible range of users. This data takes the form of charts that log data for 90% of the population; it discounts the top 5% and the bottom 5% of the population as the numbers of people in these extremes is small. this is known as the 5th to 95th.
  4. Ergonomics Workstation Setup Tool. This Excel-based table look-up software obtains anthropometric body benchmarks. The user selects (1) posture (seated or standing); (2) sex (male or female); (3) basic stature information of the individual being assessed (5th, 25th, 50th, 75th or 95th percentile); and (4) typ
  5. The proportion of a population with a dimension at or less than a given value. The 50th percentile is the average Deciding whether to use the 5th, 50th or 95th percentile value depends on what you are designing. Shown in an anthropometric table. To fit a range of people products can be adjustable or come in various size

In other words, accommodating the central 90 percent (5th to 95th percentile) costs half as much as accommodating the whole range. Examining the slope of the curve, one can also see that it turns and gets very steep beyond the 5th to 95th percentile points. So the 5th and 95th percentile marks have been chosen as the most cost effective design. Malaysian automobile seat fit parameters, namely backrest width, backrest height, cushion width, and cushion length were established from collected anthropometric dimensions: interscye breadth (5th percentile female and 95th percentile male), sitting shoulder height (5th percentile female), hip breadth (95th percentile female), and buttock. 95th percentile denotes that 5% of the people you are measuring (ie. 1 in 20) are taller than this value. Therefore, 90% of the people you are measuring have a height between the 5th and 95th percentile values. When designing products, this is often referred to as providing for the middle 90% of the population; that is to exclude the smallest 5 Designed to support 5th to 95th percentile operators in a sitting or standing posture. Work surface height is easily adjustable at the touch of a button. Download: Ergonomics At Work BOSTONtec was founded on a commitment to providing ergonomic workstations that improve the quality of life and increase productivity. This is achieved through a.

5th-ile 50th-ile 95th -ile. Example of percentile persons. The use of design software tools that employ digital human models has been increasing for cockpit accommodation design The 5th and 95th percentiles are the lines that set of the edges of the curve in a distribution over a bell curve. If you draw the bell, and mark the 5th and 95th percentile spots, those marks separate the bulk of the curve from its edges. The calculations for the 5th and 95th percentile are carried out using normal distribution The seats — and protective seat belts — have been designed to offer maximum protection for personnel from the lightest 5th percentile female to a heavy 95th percentile male. The results are clear: Even in a vehicle like the HUMVEE that was not designed with threats like IEDs in mind, Mobius's blast-resistant seats offer an upgrade that.

The Legato Keyboard Arms lead our lineup for refined design, ergonomic features and exceptionally high stability. These arms are ANSI/HFES, 100-2007 and BIFMA G1-2002 compliant by meeting the adjustment guidelines for users from the 5th percentile female seated to the 95th percentile male seated, while conforming to the operator's knee-clearance requirements AS One of the basic principles of ergonomics is to incorporate a user-centered design that accommodates the breadth of its users, rather than employing a one-size-fits-all approach. Ideally, new endoscope control sections would be designed to accommodate the hand span and hand strength of a 5th-percentile female as well as a 95th-percentile male 1. Steelcase Leap - 90/100 Ergonomics Rating. Our highest ranked chair in the list is the Steelcase Leap chair.This also happens to be our best office chair for 2020.Steelcase put a big emphasis on fitting the 5th to 95th percentile with this chair and it's no surprise that it ended up in the first position on this list

Ergonomics and Handheld Medical Devices: Five Vital

  1. The upper limb posture study shows that, according to the percentile of body size of Chinese welders, the best operating distances for males in the 5th, 50th, and 95th percentile are 321 mm, 371 mm, and 421 mm, respectively, and the optimal operating heights are 1050 mm, 1100 mm, and 1150 mm, respectively; for females in the 5th, 50th, and 95th.
  2. Different ergonomic triangles for drivers of the 5th (a), 50th (b) and 95th percentile (c) Full size image Starting from this positioning, the L 1 length, defended as the horizontal distance between A′, i.e. the point with the lowest z coordinate on the longitudinal profile of the seat, and the vertical projection of the seating point A, has.
  3. Just having ergonomic adjustments doesn't mean that you'll fit a large range of users though. Each of these adjustments needs to have the range of motion to fit those users properly. Steelcase has done a great job focused on the majority of the population that falls within the 5th and 95th percentile
  4. Ergonomic design considerations & the variation of anthropometrics according to demographics. Anthropometric dimensions for each population are ranked by size and described as percentiles. It is common practice to design for the 5th percentile (5th%) female to the 95th percentile (95th%) male

In ergonomics, the 95th percentile is a statistical value often used to determine the upper anthropometric dimension, or body size, boundary value for ergonomic designs. The average score of students who were in the same grade and tested in the same term as observed in the latest NWEA norming study Maximum grip strength for men (5th, 50th, and 95th percentile) is given in Figure 4.9.3-2. 3. Grip strength for females is shown in Figure 4.9.3-3. b. Arm, Hand, and Thumb/Finger Strength - Figure 4.9.3-4 presents arm, hand and thumb/finger strength for fifth percentile males. These figures must. The BIFMA G1 provides recommendations for sizing furniture to accommodate the 5th percentile female to the 95th percentile male of the North American population. 73.3.a HFES standards accommodate at least 90% of the North American workforce Smallest user: 5th percentile Adequate clearance to avoid contact or trapping Manholes, Cinema seats Shoulder or hip width, Thigh length Largest user: 95th percentile A good match between the user and product Seats, Cycle helmets, Pushchairs Knee-floor height, Head circumference, Weight Maximum range: 5th to 95th percentile A comfortable and.

Ergo-link™ 3-D Human CAD Mannequin Model

50th percentile 95th percentile 5th percentile. dimension (e.g. stature) le 5th percentile 95th percentile Range of adjustment needed for 90% of the population. Bodyspace (Pheasant and Haselgrave, 2010) Ergonomic Design Principles Sequence Frequency Importance Function. 1 2 3 Ergonomic Design Principle In ergonomic design, we do not design for the average person, or the 50th percentile, we design for the 95th percentile. In other words, 95% of the population can use the work area safely and efficiently, and 5% of the population may need to be accommodated Develop internal ergonomic standards to guide product purchases: You will need one for most people (5th percentile woman to 95th percentile man), and one for 'exceptional' individuals (those who are differently-abled and require special accommodations) As a result, one often tries to piece manikins together by attaching (e.g.) 5th percentile arms onto a 95th percentile tall figure, or otherwise combining different percentile segments in order to try to represent the considerable percentile variation in body segments existing within individuals in the population of a 95th. 5th Percentile Female Primary Reach Zone Forward Functional Reach (26.7) 95th Percentile Male Primary Reach Zone Forward Functional Reach Zone (35.6) Figure 1 - Primary Reach Zones 1 ANSI/HFES 100 - 2007 Human Factors Engineering of Computer Workstations©2007 HFES p.1

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Extreme Ergonomics - Ergonomic Chairs for Tall People and

Anthropometric dimensions for each population are ranked by size and are described as percentiles. It is common practice to design for the 5th percentile (5th %) female to the 95th percentile (95th%) male. The 5th% female value for a particular dimension (e.g. sitting height) usually represents the smallest measurement for design in a population Collections of anthropometric data — which give measurements for all sorts of human parts such as stature, arm length, head circumference, armpit height, hip-knee length etc — typically state means, standard deviations and values for the 5th to 95th percentiles 4. It is quite common to design for the 5th percentile to 95th percentile range. Ergonomics is the science of making the work environment safer and more comfortable for workers using design and anthropometric data. It is basically a user-centered approach that. FIGURE 5.15 Anthropometric data relating to the 5th and 95th percentiles for men and women. (From De Chiara, Joseph, Panero, Julius, Time-Saver Standards for. The imported view points (95th percentile male, 5th percentile female etc.) per vehicle are listed in the list field. Add View Point: Adds a view point to the list. Update View Point: Updates the selected view point to the spin box values. Delete View Point: Deletes the selected view point; Vehicle Positio 5 th - 95 th. Accommodates users from the seated 5th percentile female to the standing 95th percentile male

Ergonomic design can use anthropometric data in three different ways: Firstly, designing for a range; either from the 'smallest to the largest'. The prevalent is from the 5th percentile to the 95th percentile, such as the design of adjustable height chairs based on height Like people who are taller or heavier than the average body, small people are having a hard time looking a chair that fits right. Most chairs, even the adjustable ones, are made to fit the 5th - 95th percentile. A 5'2 female typically fits at the 5th percentile, but will soon find that most chairs are really not fitted properly 5th and 95th Percentile. Standard deviation, x 1.64 MEAN = 5th percentile 1.64 + MEAN = 95th percentile. x 2.32 MEAN = 1st percentile 2.32 + MEAN = 99th percentile Using these data, you can compute a range of statures, leg lengths and others. Applying Statistics to Desig These people are considered the 50th percentile of the workforce. The ability to meet the diverse needs of the average worker, not to mention the extremes of the shortest and tallest workers (known as the 5th to 95th percentile), can only be achieved with adjustable height desks that adjust from 22.5 to 48.5

Case study Anthropometric data and Australian - Ergonomic

More than just the right fit, ergonomics testing is crucial to safety. (Typical aircraft are designed to fit people whose anthropometric characteristics fall within the 5th and 95th percentile of a population. In the case of XB-1, our fit was narrowed to just two test pilots, which allowed for a faster design process.). Predictably the 50th percentile mark is the point at which 50% are below the height and 50% are above. The line down the middle in this case is the most common height. Design Limitations. Myth of designing for the average person. Myth of designing for the 5th and 95th percentile. Using appropriate anthropometric dat To accommodate the Chinese tractor operator population, the 95th, 50th and 5th percentile virtual operator models which respectively stands for the big figure, medium figure and small figure of Chinese adult males for ergonomic evaluation were created in JACK, and the angular comfort range for human body joints were determined BOSTONtec's ergonomic focus is achieved with a complete line of accessories including options to lift, tilt, rotate, and slide for better task positioning. All work surfaces feature height adjustability to support the 5th through 95th percentile employee in a seated posture In ergonomics, the variation within the target population is commonly accounted for by using the 5th and/or 95th percentiles of important design characteristics (e.g. body size, visual abilities, literacy), with the intention of accommodating at least 90% of the target population. In some circumstances, a different percentile range is used

Anthropometrics - Chair Ergonomic

Using the combined data set, develop a table indicating 5th, 10th, 25th, 50th, 75th, 90th, and 95th percentiles by gender and in the aggregate. Include the percentile results from your data set (aggregate) for comparison The 95th percentile can mean different things and we will start by giving you a couple of examples: Test Score: This may be the most common place where percentile is used in daily life. If your test score is in the 95th percentile, it means that you scored better than 95 percent of all the test takers The results of the improved driving cockpit for FSAE would reduce driver's fatigue and improve driving performance in population ranges from 5th percentile female to 95th percentile male. It will assist the 2017-2018 FSAE Michigan competition under the design events and actual dynamic performance and reach the goal of being top 10 in the world.

average sizes (50th percentile) and design for extremities (5th/95th percentiles) [3]. Using these approach one can conveniently ensure significant level of safety and comfort of care givers and patients, as well as improve the performance of operators of the health facility. The ergonomic trends in th many options like gender selection, percentile selection, edit-ing human anthropometry. In this study two percentile values 5th and 95th percentile are considered. 2.3 Design of manually operated sprayer in CATIA Most used model of sprayer was taken into consideration. All parts of sprayer like tank, stand, handle, straps and handl In ergonomic design, one can use anthropometric data expressed in percentile in three different ways. The first is designing for a range (designing for the smallest to the largest, usually from the 5th percentile to the 95th percentile), an example being the design of adjustable height chairs based on popliteal height

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We 4) Most doorways are built to fit which percentile? A) 5th B) 50th C) 75th D) 95th 5) Which statement is not true of static anthropometrical data A) The distance that the thumb can reach to switch a torch light on and off. B) The height of a stool to enable a comfortable seating position To facilitate the incorporation of human models into the operating environment of the grafting robot, I-DEAS graphic software was applied to establish individual models of the grafting robot in line with Jack ergonomic analysis. Six human models (95th percentile, 50th percentile, and 5th percentile by height for both males and females) were. This article presents sitting anthropometry data for Malaysians focusing on seat fit parameters. It offers additional data regarding seat design requirements as there have been only a few efforts m.. Dec 4, 2019 - Ergonomics is the science of making the work environment safer and more comfortable for workers using design and anthropometric data. It is basically a. Pinterest. Today. Explore. When the auto-complete results are available, use the up and down arrows to review and Enter to select. Touch device users can explore by touch or with. Many products developed for children will also require careful consideration of anthropometric data and ergonomic design specifically, the designing of computer furniture for primary school age students is a complex issue requiring consideration of a large percentile range, 5th-95th, across genders and encompassing significant age variatio

(PDF) Ergonomic Assessment of School Furniture in Primary

The result is state-of-the-art leading energy absorbing seats that meet highly demanding conditions with top ergonomic qualities. Our troop seat is the chosen solution by leading platform manufacturers from the US, Israel and Europe. an innovative approach to design, our new seat offers you the highest level of performance in the most extreme. The seat depth is usually designed using the fifth percentile value of the buttock-popliteal length for optimum benefit. 3. Thigh thickness: The thigh thickness is used to design the seat-desk clearance, SDC, (the distance between the seating surface and the under-surface of the desk/table) View 3-isen_665_ergonomics_lecture_03(1).pdf from INDUSTRIAL 665 at North Carolina State University. Engineering Anthropometry & Work-Space Design it's funny, right? philosophical question to ask Ergonomic Consultants in Corona on The Real Yellow Pages®. Ergonomics in the Automotive Design Process, Bhise, Vivek Based on the author's forty plus years of experience as a human factors researcher, engineer, manager, and teacher who has conducted numerous ETC tested the designs for a 5th-95th.