In the lending process of PT. XYZ in Jakarta, an issue that growth in this market is lending disbursement that is not in agreement with the period stated by the Lending Relationship Manager. The aim of this study is to learn how to implement Lean Six Sigma, identify improvements, and determine what activities in the lending process are categorized as waste in order to improve the productivity and performance of Relationship Manager Lending PT. XYZ in Jakarta. Improvements were made by using Lean Six Sigma through the DMAIC to minimize waste by applying fishbone analysis and why analysis to identify the root of the problem and improve to such problems. The results obtained are the implementation of Lean Six Sigma in business processes, there is a time saving of 8 days or a decrease of 40% and an increase in sales target of Relationship Manager Lending PT. XYZ in Jakarta in 2021 is 8.92%

Keywords : DMAIC, fishbone analysis, Lean Six Sigma, waste, why analysis