Implementation of The Six sigma Method in Controlling The Quality of The Cosmetic Cream Production Process at PT. XYZ

Abstract

PT XYZ is a manufacturing company that produces medicines, cosmetics and food supplements. The frequent occurrence of cosmetic cream samples that do not meet the specifications set by the company has an impact on delays in the production schedule. The purpose of this paper is to identify the factors that cause cosmetic cream product defects, then provide suggestions improvement. 

To carry out these objectives, the six sigma method is used to identify, measure the sigma level of the types of defects that occur in bulk cosmetic products. Determine the dominant defect using Pareto diagram. Analyze and find the root cause of the dominant defect using Ishikawa diagram. Proposed improvements to the root cause of the problem using the 5W1H tool and to ensure the proposal is effective, it is proposed to use the SOP for the production process.

The results show that there are 2 factors that contribute to dominant defects, namely inappropriate viscosity of 60% and pH levels of 40%. The sigma values for the two types of defects are 2.59479 and 2.86963 respectively. From the results of the analysis with the Ishikawa diagram, it is concluded that there are 4 sources of root causes of the problem, namely from human, material, machine and environmental factors. 5 improvement proposals were submitted using the 5W-1H tool.

To test the effectiveness of the proposal, an SOP was made as a guide in the production process of cosmetic cream preparations. Product defects are recorded and analyzed then the sigma value is measured.