Paper Title
Factor Affecting Wastes Reducing in Production Processes of Essilor Manufacturing (Thailand) Co., LTD.

Abstract
The purposes of this research are 1) To study the waste level of production processes in Essilor manufacturing (Thailand) Co.,Ltd. 2) To study factor affecting wastes reducing in production processes of Essilor manufacturing (Thailand) Co.,Ltd. Accidental sampling with a sample size of 210 employees were randomly selected from employees in Essilor Manufacturing (Thailand) Co.,Ltd. The research instruments were questionnaires and data were analyzed by SPSS For Windows. Statistics for data analysis were percentage, arithmetic mean, standard deviation while Multiple Linear Regression was used to test the hypotheses. The research results were as follows: 1. In overall, the level of waste in production processes in Essilor Manufacturing Co.,Ltd, was at high level. 2. Smooth Production, Pull System & Kanban and Work Standardization techniques had positive influence on waste of eyeglass lens production process at statistical significance level of 0.01, 0.01 and 0.05, respectively. While the Line Balancing technique had a negative influence on waste of eyeglass lens production process at statistical significance level of 0.01. Keywords- Techniques, Wastes, Eyeglass lens production processes