The knowledge area includes the main functions and supporting functions or facilities. The main function has a function in realizing the project in accordance with the context of project management which includes: Scope management, time management, cost management, nualitvr management. And the support function has the function of achieving efficiency and effectiveness in project completion. Support functions include human resource management, communication management, risk management and procurement management. The science of managing the project is called project management. So project management is an activityr of applving knowledge, skills, methodologies and techniques to utilize resources to manage a project to meet the expectations of interested parties. Question Give an example in the project, aspects of the balance between the expected quality of the project with the limitations of cost and time