“…Over the years, the number of publications of conceptual articles tend to stabilize, and the number of analytical papers will become more widespread. For example, conceptual (or theoretical) studies showed the main terminologies, barriers and tools, most impacted indicators after the lean implementation, such as length of stay (LOS) and patient waiting time, readiness factors, lean leaders' behaviors and created models for the implementation and sustainability of the LHC (Aij and Teunissen, 2017;Al-Balushi et al, 2014;Bruno, 2017;Hallam and Contreras, 2018;Henrique et al, 2021;Parkhi, 2019;Santos et al, 2020;Tiso et al, 2021). Analytical (practical) studies have implemented or adapted the VSM, 5S and Kaizen tools to reduce waste, even during the COVID-19 pandemic, creating and validating frameworks for specific health contexts, and confirmed in practice the leadership behaviors and readiness factors (Cardoso, 2020;Tortorella et al, 2020;Tufail et al, 2021;Vaishnavi and Suresh, 2020).…”