عوامل حیاتی موفقیت در توسعه و پیاده سازی ابزار صنعتی با هدف ویژه: یک دیدگاه ارگونومیک

The variety of different manual tasks performed in industry is infinite. In many circumstances, these tasks are carried out under difficult conditions with ergonomic concerns about the postures, force or repetitions involved. These tasks are sometimes performed using a dedicated special purpose tool, often developed by the workers themselves. These special tools are generally task-oriented only, with very little consideration of basic ergonomics. Therefore, in many cases, the design of a new or improved special purpose tool is one of the solutions that could enhance the ergonomics of the performed task. However, developing and implementing a new or improved tool is not an easy assignment and the ergonomist could face many unexpected challenges and pitfalls. This paper discusses the pitfalls that could compromise these ergonomic interventions and the critical success factors that should be considered. The main difficulties that could arise during such a project include the poor understanding of the user's needs, the hidden constraints related to the requirements of the task to be performed, the construction and testing of the prototypes, and the users’ resistance to change. Critical success factors related to worker participation, needs and constraints analysis, and the implementation of prototypes, are presented. Examples from industrial projects involving the development and implementation of special purpose tools are used to support the discussion. This paper should provide some guidance in this particular field of applied ergonomics.