Excellent, the project is approved and relevant documents signed. Now it has to be implemented, piece of cake!
Not so easy, if you try to implement it. Few segments have to be closely monitored. Project team needs clear picture of duties and responsibilities of each member, as well as guidance and monitoring during project execution. Then, project plan and timeline with clearly set up milestones and task dependencies. Planning of procurement and coordination of contractors is as important as management of project team.
The main rule is "project manager is not working on project tasks, he/she manages project team".