The process groups are linked by the results they produce - the result or outcome of one becomes an input to the other. Although the above diagram is drawn with discrete processes in an actual project there will be many overlaps.
Project management processes can be organized into five groups of one or more processes each:
Initiating processes - recognizing that a project or phase or committing to do so.
Planning processes - devising and maintaining a workable scheme to accomplish the business need that the project was undertaken to address.
Executing processes - coordinating people and and other resources to carry out the plan.
Controlling processes - ensuring that project objectives are met by monitoring and measuring progress and taking corrective action.
Closing processes - formalizing acceptance of the project or phase and bring it to an orderly end.
