Kevin Rojas, Vidal Aramburu, Edgar Ramos, Carlos Raymundo, Javier M. Moguerza. Six Sigma-Based Optimization Model in Hauling Cut and Fill Exploitation Activities to Reduce Downtime in Underground Mines in Peru. In Waldemar Karwowski, Stefan Trzcielinski, Beata Mrugalska, editors, Advances in Manufacturing, Production Management and Process Control - Proceedings of the AHFE 2019 International Conference on Human Aspects of Advanced Manufacturing, and the AHFE International Conference on Advanced Production Management and Process Control, Washington, DC, USA, July 24-28, 2019. Volume 971 of Advances in Intelligent Systems and Computing, pages 365-375, Springer, 2019. [doi]