“…Finally, in the check stage, managers can evaluate the improvements achieved, or spot problems before they affect the project, by monitoring the buffer consumption during the project progress and comparing this with the estimated buffer sizes obtained from Equation (1). This assists managers in discussing and agreeing on next steps (Jackson, 2020). In real-life projects, the 'green-yellowred' buffer monitoring chart (Goldratt, 1997) is widely employed to monitor buffer consumption in the execution phase.…”