Abstract:
To find the method of improving the performance in term of industrial engineering perspective as well as to increase customer satisfaction. The labor supplying company was presented to be the ideal of this research with applied Six Sigma principles (D-M-A-I-C) that include Problem definition, Measuring, Analysis, Improvement and Controlling. According to the level of customer satisfaction survey along with Five dimensions of service quality shown that customer satisfaction index, 67.8%, that is lower than the level of customer expectation of 80%. There are 7 issues that were chosen to determine the cause of problem with the Why-Why analysis technique and the outcomes provided 20-problem causes and 19-problem solutions. Researcher and company executive agreed that 17 of problem solutions are worthy to be executed while 15 of problem solutions have been already applied as well as provided measurable results.After implementation, the results shown that the level of customer satisfaction raised. Customer satisfaction level of Workers put on safety equipment when on duty issue increased from 60% to 73.55%. Speed of document daily delivery issue, level of satisfaction increased from 62.6% to 83.23%. Contractor focuses on manufacture safety rules and instructions issue, level of satisfaction increased from 70% to 75.48%. Ease to contact the contractor issue, level of satisfaction increased from 68.8% to 80%. And Fault detail of document delivery, level of satisfaction increased from 61.2% to 87.74%. The level of customer satisfaction toward problem solving evaluation represented that customers satisfied with contractors solution of labor supplying delay after request and quick response when problem occurs account for 89.33% and 76% respectively. In controlling process, not only the indicators are assigned for each issue but also level of goals and monitoring frequency are set in order to continually improve the level of customer satisfaction that expected to be higher in the future.