“…There is also a dominance of studies reporting successful lean interventions [21,[27][28][29][30][31][32][33][34][35]. The positive aspects of implementation of LM tools refer both to the economic effects (lowering the unit costs, lowering the costs of studies), as well as organizational effects, such as improving the patient flow [36][37][38][39], shortening the waiting time for procedures [22], reducing the number of unnecessary examinations or shortening the hospitalization time [23,37,40], and human effects (increasing the engagement of employees, satisfaction from implemented improvements or change of the method of work from individual to team work) [24,[41][42][43]. The latest study provides practical guidance to support the implementation of a cost-effective approach in hospital operations, with the study repeating and testing different processes in different healthcare units [17,44].…”