Ergonomic Improvements : A Case Study in the Production of Red Dot Sights

• Main Authors: Färm, Felix, Roos, Elin
• Format: Bachelor Thesis
• Language: English
• Published: 2016
• Subjects: Technology; Ergonomics; workplace environment; strain injuries; red dot sight; precision work; Teknik; Ergonomi; arbetsmiljö; belastningsskador; rödpunktssikte; precisionsarbete; Luleå
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-50861

This thesis of 30 HP is the final part of the program Master of Science in Industrial Design Engineering at Luleå University of Technology, performed during the spring of 2016. The work has been performed at Aimpoint in Malmö, Sweden, who are world leading in the production of red dot sights for military and hunting applications. The company in Malmö consisted at the time of this thesis of about 110 employees, whereof 62 assemblers in the production. The production consisted of a cleanroom and packaging unit. Due to former work related injuries among the assemblers in the production, the objective of this thesis has been to investigate which workstations that could be straining on the body, and which body parts that were affected. With this information some suggestions for improvements through an ergonomic perspective regarding work environment and working postures were developed. The aim of this thesis has thereby been to lower the work-related injuries by improving the work environment.The red dot sight that is assembled by hand at Aimpoint comes in three main assembly families, called Hunter, Comp and Micro, which can be divided into Micro 1 and Micro 2. These three families are preassembled along 16 workstations before they enter their own line consisting of five workstations, all stationed in the Cleanroom. When the sights are assembled, these are sent for laser marking and packaging in the packaging area. The theoretical background of this thesis concerning ergonomic guidelines, common work related injuries, long-term sitting, the salary and Lean Production’s affection on the body, contributed to a good foundation of this project. Through a questionnaire and interviews, information could be gained about the workload in the production from the assembler’s point of view. From further methods such as HTA, RULA, OCRA and observations, a clear picture of which workstations that were containing repetitive, straining and strengthening working postures was established.The results showed that the second station of ...