Application of Lean Six Sigma Approach to Reduce Worker Fatigue in Racking Areas Using DMAIC, VSM, FMEA and ProModel Simulation Methods in Sub Logistic Companies: A Case Study of Indonesia. (2021). International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) , 7(6), 1-11. https://doi.org/10.31695/IJERAT.2021.3716