ULRYCH, Wojciech. THE 5S METHOD AND ITS INFLUENCE ON EMPLOYEE WORK REQUIREMENT PRACTICES WHICH CAN HAMPER LEAN SERVICE INTRODUCTION. Journal of Positive Management. Online. 1 October 2020. Vol. 10, no. 2, pp. 30-41. [Accessed 9 November 2025]. DOI 10.12775/JPM.2019.005.