Optimization of the Procurement Process of Pharmaceutical Supplies at Dr. M Goenawan Partowidigdo Pulmonary Hospital with a Lean Six Sigma ApproachUlfia Mutiara Supatmanto, Amal Chalik Sjaaf, Helen Andriani, Wellya Hartati and Lukluk UtaminingsihBIO Web Conf., 75 (2023) 05012DOI: https://doi.org/10.1051/bioconf/20237505012