What is Project Lifecycle?

Project Life Cycle Definition
Khalil Shahriari PMP, Management Consultant, Iran
The project life cycle defines the phases that connect the beginning of a project to its end. Usually these phases are sequential.

What is Project Lifecycle?
Jaap de Jonge, Editor, Netherlands
Every project has a beginning, a planning phase, a period during which activities move the project toward completion, and an ending (either successful or unsuccessful).
In other words, any project typically has the following four major phases (each with its own agenda of tasks and issues):
1. Initiation (= Start, Begin, Inception, Conceive)
2. Planning (= Plan, Define)
3. Execution (= Do, Perform, Implement, Construction)
4. Closure (= Finish, End, Commission, Transition)
Taken together, these phases represent the path a project takes from the beginning to its end and are generally referred to as the project life cycle.