Abstract:
Due to the critical flooding problems by the end of the year 2554, the Hoya Lens Thailand Company Limited experienced a lot of damage that caused the inefficient production process. The objective of the independent study was to increase the production efficiency of the Hoya Edge Lens Process (HELP). The analysis technique for the production process on the elimination of 7 wastes was applied, as well as the analysis technique for reducing the wastes was used in order to have more efficient production.
The methods of improving efficiency were specified as follows: (1) The process of the lens cutting was changed to the automatic process by using the conveyor belt set and Transfer Robot for transferring the workpieces and for increasing frequencies in the preventive maintenance for every 2 months. (2) In the process of the Optical Inspection, the material used for the pin of the Center Thickness was changed to the Polyacetal (POM). (3) In the De-block process, the Fixture clinging to the Holder was used to make the work of the operators easier. (4) The revision of more trainings for the employees was scheduled, as well as the penalties and rewards were stipulated.
The results of the improvement of the production process showed that the production output increased by 0.38%, and the problems of the scratches on the convex and concave lens (KIZU1) decreased by 0.22%, while the production time decreased by 18.53% which led to the increase of the production effectiveness per employee by 22.17%. The finding results indicated that the improvement methods for the production process made the increase of production process efficiency.