IISE transactions on occupational ergonomics and human factors最新文献

OCCUPATIONAL APPLICATIONSMultiple occupational exoskeletons have been developed recently with potential to reduce physical demands, muscle fatigue, and risk of over-exertion injuries in manufacturing, yet there are currently challenges in practical, large-scale deployment. We explored how stakeholder perceptions of exoskeletons were affected by exposure to passive arm- and back-support exoskeletons. Our outcomes indicate that even brief exposure to exoskeletons can positively influence worker and stakeholder perceptions on the usefulness and safety of exoskeletons. However, worker concerns about device usability and acceptability in the field were not mitigated by such brief exposure. This work may help manufacturing industry stakeholders understand what technology-adoption factors need further consideration when planning for exoskeleton deployment.

OCCUPATIONAL APPLICATIONSMusculoskeletal disorders are prevalent among warehouse workers who engage in repetitive and dynamic tasks. To prevent such injuries, it is vital to identify the factors that influence fatigue in the upper extremities during these repetitive activities. Our study reveals that task factors, namely the bottle mass and picking rate, significantly influence upper extremity fatigue. In most cases, the fatigue indicator is a functional variable, meaning that the fatigue score or measurement is a curve captured over time, which could be modeled as a function. In this study, we demonstrate that functional data analysis tools, such as functional analysis of variance (FANOVA), prove more effective than traditional methods in specifying how task factors contribute to the development of fatigue in the upper extremities. Furthermore, since there are inherent differences among workers that could affect their fatigue development process, the data heterogeneity could be tackled by employing clustering methods.

OCCUPATIONAL APPLICATIONSSedentary behavior is a significant health concern among office workers. We completed the same 6-month sit-stand table intervention at work for groups of normal-weight and overweight workers, and compared it to not having sit-stand tables. The intervention caused the intended decrease in sitting time in both groups and a corresponding increase in standing. We did not find compensation effects on physical behavior outside of work. Furthermore, the intervention did not change the composition of fat, lean, and bone mass in either group. Thus, strategies including initiatives to increase physical activity are likely needed to have effects on body composition; and an intervention needs to be sustained for longer than six months for any changes in body composition to be observed.

OCCUPATIONAL APPLICATIONSWe developed a method for integrating back-assist exosuit capabilities into regular clothing to make musculoskeletal relief accessible to more workers. We demonstrated proof-of-concept that this uniform-integrated exosuit can be effective and usable. Existing occupational exosuits are standalone accessories worn on top of a user's clothing and are not suitable for all workers. Our newly developed sub-class of exosuit could be beneficial to workers who alternate between bending, lifting, and sitting tasks, or to those in customer- or patient-facing jobs where it is important for wearable technology to be discreet.

OCCUPATIONAL APPLICATIONWe found that small business enterprises (SBEs) face intra- and extra-organizational barriers in different dimensions related to their work system to practically implement human factors/ergonomics (HFE) knowledge transfer and to achieve its benefits in an industrially developing country. Utilizing a three-zone lens, we evaluated the feasibility of overcoming the barriers identified by stakeholders, especially ergonomists. To overcome the identified barriers in practice, three types of macroergonomics interventions (top-down, middle-out, and bottom-up) were distinguished through macroergonomics theory. The bottom-up approach of macroergonomics, as a participatory HFE intervention, was considered as the entry point to overcome the perceived barriers in the first zone of the lens, which included such themes as lack of competence, lack of involvement and interaction, and inefficient training and learning approaches. This approach focused on improving emotional literacy as a care zone among the small business enterprise personnel.

OCCUPATIONAL APPLICATIONSResults of a survey of drivers working for two bus companies in Norway suggest that 20% of drivers sometimes use a mobile phone while driving, even though it is not permitted. Sociotechnical analysis of the system surrounding drivers at one of the companies elicited ways in which social and technical factors combined to support mobile phone use by bus drivers. These factors were arranged under four themes: increased societal dependence on technology; developments in bus driver culture; the need for bus drivers to resolve conflicting goals; and a lack of belief in adverse consequences of using mobile phone while driving. Our findings (i) support claims that driver-centered analyses of mobile phone use or other traffic safety challenges are an insufficient basis for the development of measures and should be supplemented by sociotechnical analyses; and (ii) can inspire the design of more comprehensive measures to help reduce mobile phone use and road safety risks.

OCCUPATIONAL APPLICATIONSPhysical workload may lead to negative outcomes, including musculoskeletal disorders. In this study, we found that there were observable changes in facial features over the length of a low intensity, prolonged assembly task, and that these changes were correlated to other measures of physical workload. This method can be implemented by practitioners to evaluate physical workload.

OCCUPATIONAL APPLICATIONSThe COVID-19 pandemic caused large organizations and institutions to adapt their decision-making procedures and hierarchical structures to address pandemic-specific concerns. By examining a large public university, we found that effective adaptation occurred through restructuring the decision-making processes, coordinating decisions between departments, and effective monitoring of prior decisions. When considering the COVID-19 pandemic as a fundamental surprise event, our work identified strategies and decision-making that both maintained and increased adaptive capacity through the course of such an event. Through this case study, we highlight decisions that can be made by similar large organizations, to increase adaptive capacity when they are faced with similar surprise events.

OCCUPATIONAL APPLICATIONSThere are increasing numbers of organizations that are implementing digital procedures (e.g., standard operating procedures). These efforts are often assumed to be a positive development but can be quite costly-both in terms of money and training for a digital rollout. As a result, organizations and practitioners may find themselves at risk for failure when implementing digital procedures. The results of the current study suggest that if workers perceive digital procedures as useful and easy to use, this perception translates into positive attitudes, which subsequently result in fewer deviations. Since acceptance is relatively easy to assess, practitioners can benefit from using these assessments prior to a digital transition/roll-out to both compare competing hardware and software applications, and to initiate and continuously monitor the development of digital procedures. We consider this approach as advantageous to having management develop a system and fully deploying digital procedures without any consideration of worker acceptance.

OCCUPATIONAL APPLICATIONSThis case report shares an approach to ergonomics kaizen events, that is, using workplace teams in a concentrated activity to make as many improvements as possible in a few days in a given work area. This report provides an overview of (1) the structure of this particular approach, (2) the average number of improvements implemented, and (3) guidance for smaller organizations on less-elaborate approaches. The value of kaizen events is described regarding cultural change and creating habits of continual improvement in daily life, whether at work or at home. Practitioners may benefit from the details in this report, such as features important for success and the schedule for a four-day event. Researchers may benefit from familiarity with a nontraditional organizational structure. Furthermore, the kaizen approach may lend itself to university-enterprise interactions, including a changing context in which research topics can be formulated and results applied.