I think in real life project life cycle would not be easy. Planning and execution phase is the one of the most important phases in the project life cycle. These phases need to be integrated with the organization project. In real life there is need to know if the project going to be technically feasible or not, will it have required outputs or not. There is need of proper resources sometimes getting proper resources is important and consumes time. Execution phase is one the most time-consuming phase since here there is implementation of the project and the necessary output should meet. The team has to cordial as the final result is important. There is need of constant communication with the team members.