Which of the following activities is NOT a part of the Derning Cycle?

Act is the fourth and final phase of the Deming Cycle, where corrective actions and improvements are applied based on Check phase findings.

Plan is the first phase of the Deming Cycle, where objectives, processes, and success criteria are established before execution.

Do is the second phase of the Deming Cycle, where the planned changes are implemented, typically on a small or controlled scale.

The Deming Cycle, also known as the Plan-Do-Check-Act (PDCA) cycle, is a four-stage iterative model for continuous improvement used widely in IT service management frameworks including ITIL. 'Co-ordinate' is not a phase of this model - it belongs to other management or project frameworks - making it the only activity listed that falls outside the Deming Cycle.