The ergonomics of children in playground equipment safety

INTRODUCTION: Annually, some 200,000 U.S. children require hospital emergency room treatment from injuries suffered on playground equipment. Most of these injuries (70%) are the result of falls. While standards for protective surfacing within the play zone areas are very adequate, standards for the prevention of falls are very inadequate. "Climbers" are responsible for the greatest percentage of injuries with most of these injuries the result of falls. Current standards are woefully lacking in regard to these climbers. METHOD: This paper reviews the history of climber research and climber standards. RESULTS: It then presents recommendations for improved standards in this area based on the ergonomics of the users, children.     

Implementation of participatory organizational change in long term care to improve safety

Introduction: Long Term Care (LTC) facilities are fast-paced, demanding environments placing workers at significant risk for injuries. Health and safety interventions to address hazards in LTC are challenging to implement. The study assessed a participatory organizational change intervention implementation and impacts. Methods: This was a mixed methods implementation study with a concurrent control, conducted from 2017 to 2019 in four non-profit LTC facilities in Ontario, Canada. Study participants were managers and frontline staff. Intervention sites implemented a participatory organizational change program, control sites distributed one-page health and safety pamphlets. Program impact data were collected via Survey (self-efficacy, control over work, pain and general health) and observation (Quick Exposure Checklist). Interviews/focus groups were used to collect program implementation data. Results: Participants described program impacts (hazard controls through equipment purchase/modification, practice changes, and education/training) and positive changes in culture, communication and collaboration. There was a statistically significant difference in manager self-efficacy for musculoskeletal disorder (MSD) hazards between the control and intervention sites over time but no other statistical differences were found. Key program implementation challenges included LTC hazards, staff shortage/turnover, safety culture, staff time to participate, and communication. Facilitators included frontline staff involvement during implementation, management support, focusing on a single unit, training, and involving an external program facilitator. Conclusion: A participatory program can have positive impacts on identifying and reducing MSD hazards. Key to success is involving frontline staff in identifying hazards and creating solutions and management encouragement on a unit working together. High turnover rates, staffing shortages, and time constraints were barriers as they are for all organizational change efforts in LTC. The implementation findings are likely applicable in any jurisdiction. Practical Application: Implementing a participatory organizational change program to reduce MSD hazards is feasible in LTC and can improve communication and aid in identification and control of hazards.     

Human factors applied to alarm panel modernization of nuclear control room

Human factors deal with issues related to humans, their behavior and the physical aspect of the environment in which they work. A control room is a complex system where operators perform plant operation using control systems and carry out monitoring and administrative responsibilities. For safe operation of industrial installation, the performance of the control room crew plays an important role. In this respect, a well designed control room is crucial for safe and efficient operation. The aim of this paper is to propose a methodological framework applied to nuclear control room evaluation, through participatory ergonomics, using operator activity analysis and human factors questionnaire as aid tools. We describe a case study in which the methodology framework was used in the evaluation process of a nuclear control room. The information gathered made possible a series of recommendation for the adequacy of the control room design, assisting in the safety assessment of the nuclear plant operation and justifying the alarm panel modernization.     

Using ergonomics in engineering design to improve health and safety

This paper outlines the importance of ergonomics in engineering design. It describes some of the cost benefits and principles underlying the application of ergonomics. The practical impact of the latter has become increasingly important in the light of European directives which are likely to have a substantial impact on the way engineers design. Three ergonomics case studies are described, the first two illustrate ways of identifying costs of poor ergonomics and the cost benefits of redesign using ergonomics principles. The third illustrates work which led to engineers redesigning assembly line workstations and ergonomics becoming an important part of manufacturing design. The background to this was concern about an increase in cases of Upper Limb Disorders (ULDs) and recognition that ergonomic advice was needed to find the source of problems and help in finding design options. Ergonomists were brought in and helped in identifying problems with workstations and tools. Final designs were developed by the company's own engineers based on the ergonomic study and reduced incidence of ULDs has been reported. Photographs showing examples before and after redesign can be found in the Health and Safety Executive's notes of guidance published in 1990, and some issues surrounding the nature of the detailed design solutions are discussed here. The impact of the ergonomics contribution resulted in engineers being trained in ergonomics so that it could be implemented on a routine basis throughout the site.     

Analysis of train derailments and collisions to identify leading causes of loss incidents in rail transport of dangerous goods in Canada

The Canadian railway industry has improved safety performance in the last decade as measured by freight loss incidents per billion gross ton-miles. Further improvements in safety performance require a deeper analysis of the leading causes to identify weaknesses in implementing safety systems. In this paper, we classify the causes of railway loss incidents using a Safety Management System (SMS) framework to identify system weaknesses. The role of human factors is further analyzed through the Human Factors Analysis and Classification System (HFACS) approach. For this, we utilized data from 42 main track derailments and collisions involving the transport of dangerous goods in Canada between 2007 and 2018, which have been investigated by the Transportation Safety Board of Canada in detail. Associations between adjacent sub-categories of the HFACS framework are analyzed to identify any interdependency that exists between active and latent errors using a Chi-square test and Kruskal's lambda analysis. Furthermore, we implement the Decision-Making Trial and Evaluation Laboratory (DEMATEL) method and the Analytical Network Process (ANP) to identify causal relationships between different sub-categories of the HFACS framework and calculate the weighted influence of each sub-category on main track derailments and collisions. Finally, a comparison is made between this work and others', which have analyzed human factors in the railway industry. There is good agreement between the results of these studies that highlight the importance of supervisory and organizational factors in the prevention of railway loss incidents. Based on these findings, we make recommendations to reduce railway loss incidents.