Tomaszewska, Iwona2020-11-232020-11-2320201339-5130http://drepo.uniza.sk/handle/hdluniza/375Constraint management has evolved into a whole system philosophy. It has a manufacture component, but the methodology focus remains at the system level. This article has presented briefly the main assumptions of Theory of Constraints (TOC), which concentrates on the process that slows the speed of production through the system. It is a simple overview of the types of constraints and tools of constraint management, looking at the background. It presents five crucial focusing steps of Theory of Constraints. It also shows the comparison TOC with Six Sigma and Lean Thinking.enhttp://creativecommons.org/licenses/by/4.0/theory of constraintsconstraint managementsystem as chainslean thinkingdrum-buffer-ropefive focusing stepssystems approachgoalsproduction schedulingcritical chainArticlehttps://doi.org/10.26552/tac.C.2020.1.7