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Ergonomic Design

Customized Dashboard in New Vehicles

by Mike Hoonhorst, AEP

USA Today reports that Chrysler is developing a new type of instrument panel in its 2013 Dodge Dart.  The panel is completely customizable.  Drivers can choose exactly what they want to display, reducing the amount of clutter on the display panel.  They can also switch between analog and digital, so they have control over the way they receive information.  For instance, they may choose to have an analog speed display, and a digital display showing their average MPG.  This is important, because it can reduce the time drivers spend searching for and interpreting information, which will maximize the amount of time their eyes are on the road (where they should be!)



Building Your Own Sit/Stand Workstation

Sure, ergonomic workstations can be costly, but they don’t have to be. Ask Ann Arbor web design agency build/create studios. The company’s team recently created their own sit/stand work area (and nicely documented the “work bar” process on their blog.)

Explains build/create principal, Ian Wilson, “With all of the info graphics and blog posts out there talking aboutBuild/Create Studios the toll that sitting takes on your body, and my generally sedentary lifestyle, it seemed like an essential first step to getting on my feet more and being more active.”

The team has been using the work area since early January. They stand about half of the day, alternating every hour or so between sitting and standing. Wilson concludes that “There is a “noticeable reduction in “afternoon slump” and it has encouraged us to take our eyes off of our screens and walk around more often.”

Wilson has also addressed ergonomic risk in other ways. “To reduce neck strain,” he explains, “I’ve installed a monitor on the wall in front of the workstation so that, when I’m standing, I can move my open work documents up higher, and when I’m sitting, I can move the active document down to my laptop screen. We may do this for our other workstations and, in general, we’re keeping our eyes open for simple ways in which we can improve our work posture, and make the office more efficient and ergonomic.”

For more detailed information on this topic, check out a recording of Humantech’s webinar, Sit vs. Stand – What’s the Best Ergonomic Design?



Ergonomics and iPad Neck

by Greg Cresswell, CPE

The most popular musculoskeletal disorder showing up in the news these days is “iPad neck”. It is characterized by prolonged usage of tablet computers, which results in sustained, awkward neck postures that lead to pain.

After posting record sales last quarter, it is evident that some people are moving towards replacing their pc’s with Apple’s iPad. The pain associated with extended usage of tablets is not unlike the pain you might feel from reading a book for too long.  However, because of their endless functionality people are using them for hours and hours on end.

A big concern is the prolonged usage by children. Because they are cost-effective, more and more school boards are making iPads standard in the classroom as a teaching aid.

The important thing to consider when purchasing a tablet is to carefully select the accessories you are going to use with it. With all the applications that are available, iPads are quickly becoming today’s productivity tool of choice. So when setting up your tablet pc workstation, choose your accessories carefully to reduce discomfort and avoid iPad neck!

For more information, check out this article on News.com.



Ergo Myths: The Bent-Handle Shovel is Best

By Kevin Perdeaux, CPE

The ‘ergonomic’ bent-handle shovel is not new to the market, and is a far more popular choice than the traditional straight-handle shovel. However, despite its popularity, why doesn’t the ergonomic shovel render the traditional straight-handle shovel obsolete?

bent-handle ergonomic shovel

The two shovels are designed to provide mechanical advantages in different situations. The bent-handle shovel is designed using the principles of biomechanical stress to the low back for pushing tasks. When push force is applied as the hands move vertically from the hips, either above or below hip level, the off-axis forces create increased strain to the low back. The user applies push forces through the midsection of the trunk to avoid unnecessary low back strain. However, this mechanical advantage is optimal only for pushing the snow, not lifting.

If you have ever used the bent-handle shovel, you may have noticed that the angle of the shaft positions the load such that it is difficult to raise the shovel blade end. When you attempt to lift the shovel, to clear the top of a snow bank for example, the front hand often must lift higher than is required with a traditional handle because of the angle of the shovel shaft. The front hand also bears more of the overall weight due to an inefficient lever created by the handle design. The traditional shovel handle is straight and allows for more optimal hand positioning for easier lifting.

So the next time you are out for a marathon of shoveling, go easy on your back and use the straight-handle shovel for lifting and the bent-handle shovel for pushing. Selecting the right tool for the task is important…even for snow shoveling.

Image courtesy of homedepot.com


Ergonomics Powered by Porsche

By Josh Kerst, CPE, CIE

Josh Kerst, CPEFor over 60 years, Porsche performance has been based on the intelligent ideas of its engineers, and that timeless principle has found its way into every aspect of its sports car production.  During a recent interview at the 2012 North American International Auto Show in Detroit, Matthias Mueller, Chairman of the Board of Management for Porsche AG, explained how using effective workstation and assembly line ergonomics is the company’s preferred method of increasing production within a fixed factory footprint.  Porsche’s 911 sports coupe plant in Stuttgart, Germany, plans to significantly ramp up production over the next few years.  The message is clear: effective ergonomics—There is No Substitute.

Go ahead and give the whole article a test drive.



I Spy with my Ergo Eyes…Ergonomics in Design

by Cecilia Chan

Cecilia ChanWhile on a recent site visit, two interesting designs caught my eyes.

As I steered away from the airport parking lot in a Ford Focus rental, I noticed two angled protrusions located conveniently at the 10 and 2 positions on the steering wheel right where my thumbs were resting. It was so strange! See for yourself. (Disclaimer: Photos were taken while the car was parked.) I couldn’t resist comparing this to my Camry steering wheel, a standard cylindrically-shaped steering wheel with grooves on the underside. For the rest of my trip, I pondered about the purpose of these protrusions. My conclusion is that they help to eliminate the bent thumb postures that result from gripping a conventional steering wheel. They act as a thumb rest and prevent drivers from exerting the death grip. As the miles passed, I came to appreciate the design more and more. Their 10 and 2 locations promote good driving habits, but on the down side, also prevent drivers from changing their arm/shoulder postures, which may lead to fatigue. I’d still give this design two thumbs up though! Are you a Ford Focus owner or does your steering wheel have a similar design?

The second design can be found inside the women’s washroom at Walmart. I call this design ‘the wave’. The washroom sinks are designed like the crests of a wave, with the two middle sinks located slightly higher than the outside sinks. Talk about accommodating the population! Taller women would find the higher sinks easier to use, reducing butts up postures, while shorter women (like myself) would find the lower sinks more comfortable to use, reducing awkward shoulder postures. This design idea is also great for moms with young children – no need to lift them up as high or better yet, children may be able to tip toe up to the sink themselves to wash their hands. What a great idea! Does your neighborhood Walmart washroom have a similar design?



Questions and Answers from Humantech’s Recent Webinar on Benchmarking Ergonomics Programs

by Walt Rostykus, CPE

Humantech recently presented a short web course entitled Keys to Ergonomics Program Success on December 14th. We received some great questions and wanted to share our response to those. We’d love to hear if you agree (or disagree) and what you company is doing to successfully manage workplace ergonomics.

Q: You said that online training and assessments are being used for offices.  What should I look for in a good office ergonomics software program?

A: There are several online applications available today billed as “office ergonomics software”.  They can be categorized into two general types: stretching and break programs, and assessment and training programs.  The first type focuses on personal health and wellness and has minimal effect on reducing the causative factors of musculskeletal disorders (MSDs).  It is our experience that people tire of them and stop their use within 1 to 4 months.  The second type are what we mentioned in the webinar. These are designed to provide awareness training and/or lead people to assess their workstation set up make adjustments.  This approach is known to reduce MSD risk factors present in office and computer workstations.  Features to look for include:

  • A focus on identifying and addressing MSD risk factors in office/computer tasks
    including standard office and remote (ex. Home, hotel, etc.) office workplaces.
  • Training that is SCORM compliant to align with a Learning Management System (LMS),
  • Assessment questions which focus on identification of MSD risk factors in the workplace rather than personal health.
  • Results of the assessment provided immediately upon completing the assessment questions, provide a measure of relative risk present, identify areas of concern by body part or workstation elements, and provide easy to implement solutions that are specific to the issues/risk factors identified.
  • Solutions that pursue adjustment of the existing workstation and equipment before recommending purchase of new equipment, and present only the furniture and devices approved by and provided by the organization.
  • Data from assessments and solutions which are available to the program manager to track trends of use and results.
  • Assessments and solutions that are easily tailored by the organization to reflect the local program and offerings.

Q: I disagree that stretching is not part of ergonomics.  What is your reason for saying it is not?  Isn’t it effective?

A: NIOSH defines occupational ergonomics as “the science of fitting workplace conditions and job demands to fit the capabilities of the working population”.  In other words, making the workplace fit the person.  Stretching is part of wellness and fitness that focuses on changing the capabilities of an individual, not changing the workplace.  Although many companies include stretching as part of their programs, current research has not proven any effectiveness of company driven stretching programs on the reduction of first time MSD injuries.

Q: If we are currently a “reactive program”, what should we do first to move to being more “proactive”?

A: The first step is to transition from the lagging measures of injuries and discomfort to the proactive measure of MSD risk factors.  This will get your program focused on identifying and preventing the causes of MSDs (and discomfort) before an incident happens.  This will also change your program goal from injury reduction to risk reduction.

Q: What are some quantitative assessment tools available to use?

A:  REBA (Rapid Entire Body Assessment) and BRIEF (Baseline Risk Identification of Ergonomic Factors) are two whole body risk assessment tools that provide scores of risk level.  The NIOSH Lifting Equation is a quantitative measurement tool used for lifting.   When selecting assessment tools take time to understand what they are based on (i.e. research), their ease of use, and the definition of scoring.  Ensure that they are valid, repeatable, reliable, and provide the definition within a single task and between tasks.

Q: Is online training really effective?

A:  The effectiveness of training, online or in person, depends on the intended learning objective, class content, and methods for verifying learning.  For awareness of ergonomics (both office and non-office), and for teaching principles of ergonomics, good online training classes are effective.  However, skills training like conducting assessments, applying design criteria, selecting solutions, do require some hands-on application and feedback from the instructor.  Portions of skills training are better completed through classroom or in-person coaching, not online.

Q: What did companies say about the effect of the recession on their ergonomics program?

A: The impact of the recent economy described by participating companies can be broken out into three categories; No Impact – 23%, Minor Impact – 59%, and Greater Impact – 18%.  These varied more by the type of industry and culture of the organization rather than the maturity of their ergonomics program.

-     No Impact: These companies described no significant impact on the resources or focus of their ergonomics program.

-     Minor Impact:  These companies experienced some constraints on funding and the availability of people to participate in the ergonomics program.

-     Greater Impact:  These companies have significant loss of funding and key people supporting their ergonomics program. They also made some changes in their overall program goals and measures.

Q: I wonder what challenges you have seen in consulting with ergonomics for industry due to 86% of the United States population now is Overweight and/ or with 1 or more chronic diseases, that was that was published on Oct 17th, 2011 by Gallop from their “Well-Being Index”?

A: The greatest impact of obesity on workplace ergonomics we’ve seen is the effect on reach distance and movement of large employees.  Winnie Ip, CPE and Humantech’s Director of Consulting presented this challenge and solutions at the 2011 ASSE Conference.  The other impact we’ve seen is with patient handling, specific moving bariatric patients.  This has increased the weight that healthcare professionals are expected to move during manual patient handling.

Q: What about investment, were you able to determine how much money companies invested in their ergonomics program based on employee headcount or revenue?

A:  Money is always a tough topic to discuss, even in benchmarking.  When we asked about the annual investment in the ergonomics program, 76% of participants did not know how much was spent.  So we asked people to identify general ranges of investment.  They were:

<$500,000  -  50%

$500,000 to $1Million  – 44%

>$1Million – 6%

Granted these numbers are rough estimates but we calculated that companies invest 0.0043% .05% (median = 0.0046%) of their annual revenue on ergonomics.



Ergonomics of Airplanes: What Makes Us Comfortable?

By Mike Hoonhorst, AEP

Mike HoonhorstDue to the nature of our jobs as consultants, we often find ourselves on an airplane, traveling across the country, and even across the world.  And with the holiday season in full swing, you too may find yourself flying soon.  Almost all of us have probably said, “I cannot wait to get off of this airplane!”  Having frequently been in this position, I decided to do some research on the ergonomics of flying.  What I found was both obvious and surprising at the same time.  There are many variables that affect the way passengers think of comfort when flying.

The most obvious is the lack of leg room, especially on longer flights.  We’ve all experienced discomfort in the back of our legs, which is only amplified when we can’t stretch our legs because there is simply not enough room.  Less legroom generally results in higher discomfort ratings, as reported in Possibilities to Improve the Aircraft Interior Comfort Experience. But the authors of this 2011 research article in Applied Ergonomics (Vink, Bazley, Kamp and Blok) found that there are many other reasons that passengers may find air travel uncomfortable.  The authors found a correlation between hygiene and comfort.  If the aircraft has clean seats and windows, with a bright, new-looking interior, passengers were more likely to experience a comfortable flying experience.  Passengers also found flying on newer planes to be a better experience.  Another factor that affected the comfort rating was the crew.  Passengers prefer a young, enthusiastic crew and pilots that give clear and good information during the flight.

It is surprising to me that perception can affect comfort in such a dramatic way. With airlines trying to fill more seats on every flight, this might give passengers a new perspective on what airlines consider when designing and staffing their fleets.  Safe travels!



Mobile Robots Improve Hospital Logistics

By Cecilia Chan

As a high school student, I had two part-time hospital jobs: cafeteria worker and patient support worker. My job tasks included meal delivery/pickup, linen delivery, and patient or lab sample transport…so this piece of technology resonates with me. Continuing on the theme of robots changing lives, authors of a 2011 journal article in Industrial Robot summarized the many benefits of mobile robots in hospitals.

The TUG is a mobile robot developed by Aethon (Pittsburgh, PA) to address hospital logistics needs. It is designed to travel autonomously throughout a hospital to handle linen and meal delivery or pickup, and pharmacy or lab sample transport. Similar robots known as automated guided vehicles (AGVs) have long been in use by automotive manufacturers to deliver auto parts from the warehouse to the assembly line in an efficient and accurate manner.  The TUG system consists of a battery powered mobile drive and steer module, a control module, and a detachable load carrying module. Each drive unit is capable of moving loads up to 227 kg – great for reducing ergonomic risks associated with manual material handling!

As Rick Barker of Humantech recently blogged, “the number of people requiring nursing care is outpacing the number of nurses, and as our population ages, this rate will only increase.” Studies have shown that nurses spend as much as 30% of their time dealing with logistics, such as tracking supplies, lab results, and medications.  TUGs are currently used in over 100 hospitals nationwide. They have been credited with reducing medication delivery time and lab sample turnaround time by over 50% and reduced the number of drugs misdirected or lost in transit. The TUG system also improved delivery times on night and weekend shifts when manpower was limited. This technology is positively improving patient care by allowing nurses to devote more time to patient care while driving down hospital operating costs.



Field Workers: Where is the Best Location for Your Touchscreen or Laptop in Your Vehicle?

By Blake McGowan, CPE

A common concern among oil/gas or utility industry workers is: “Where is the best location for my touchscreen or laptop in my vehicle?”  With modern advances in Wi-Fi accessibility, many companies have equipped field workers with touchscreens or laptops in their vehicles to improve productivity and the flow of information from the field to the operation centers.

Typically, touchscreens or laptops are located to the right of the driver and mounted on a post between the instrument panel and passenger seat.  This location often results in back discomfort from sustained back twisting and shoulder discomfort from excessive reaching.

Recently, Dr. Richard Marklin and his team of research engineers at Marquette University, sponsored by the Electrical Power Research Institute, conducted a detailed biomechanical-kinematic (joint angles) and muscle activity (electromyography), performance, and preference analysis of the following four common touchscreen or laptop locations (Saginus et al., 2010):

  • A – Laptop located directly over the passenger seat
  • B – Laptop mounted on a post located between the instrument panel and passenger seat
  • C – Touchscreen mounted to the right of the steering wheel
  • D – Laptop mounted to the right of the steering wheel

Results of the detailed analysis found that locating the touchscreen or laptop closer to the steering wheel (Locations C and D) is best.  In these locations:

  • Kinematics improved as a result of reduced trunk rotation and shoulder angles.
  • Muscle activity was reduced for the spine and shoulder muscles.
  • Ease of use and productivity improved.

In addition, drivers preferred locations C and D.  Overall, getting the touchscreen or laptop closer to the steering wheel will improve the biomechanics of working inside a vehicle and will reduce the risk for musculoskeletal disorders.

Saginus, K.A., Marklin, R.W., Selley, P., Simoneau, G.G., and Freier, S. (2011). Biomechanical Effects of Mobile Computer Location in a Vehicle Cab:  Human Factors, 53 (5), 474-488.




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