Ariga, R.A., Amelia, R., Astuti, S.B., Fajar, F.A.A., Ariga, S., Ariga, H.P.S. and Pane, N.K. 2022. Implementation of Lean Six Sigma in Improving Competitive Advantage through Patient Satisfaction and Nurse Resources to Face the Covid-19 Pandemic at USU Medan Hospital. Open Access Macedonian Journal of Medical Sciences. 10, G (Feb. 2022), 218–222. DOI:https://doi.org/10.3889/oamjms.2022.7888.