１.IntroductionPMBOK is a general description of the knowledge, skills and tools required for project management by the American Project Management Association (PMI), which provides a wealth of "knowledge of project management"．PMBOK mainly includes project integration management, project scope management, project schedule management, project cost management, project quality management, project resource management, project communicationｓ management, project risk management, project procurement management,Project Stakeholder Management． The purpose of this report will analyze project Integration and Scope Management course topics， also gives a specific example to explain the requirements for understanding．2. Integration in PMBOK®2.1 Role of integration as defined by PMBOKProject integration management includes the processes and activities to identify，define，combine，unify and coordinate the various processes and project management activities within the project management process group. It consists of 6 sub processes: formulating the project charter, making project management plan, guiding and managing project implementation, monitoring project operation, implementing overall change control, and ending the project or a stage. Integration management not only increases the process of "knowledge management", but also integrates the contract ending with the administrative ending, to put them in the process of "ending the project or a stage", so as to enhance the concentration of relevant knowledge. 2.2 Contribution in project managementThe role of project integration management is to ensure the coordination of various project elements, balance the conflicting objectives and maximize the benefit requirements and expectations of the project-related personnel. In project management, "integration" has the nature of unity, integration, communication and integration, and it is crucial for the process from execution to completion of the controlled projects, successfully managing expectations of the stakeholders and meeting the project requirements. Although each project management process usually appears in a clear and independent form, they will overlap and interact with each other in a way that the guidelines cannot fully describe.Scope management3.1The importance of scope managementProject scope management refers to further decomposing the main deliverables of a project into smaller and manageable components, with the purpose firstly to improve the accuracy of cost, work hour and resource estimation, secondly to determine the benchmark of performance measurement and control, and finally to make clear the assignment of responsibilities. In addition，scope is the basis of the project. Once the scope changes, most of the restraining factors need to be changed. It comes from the needs of the stakeholders, so the project manager first obtains the customer's expectation of the project, and then converts it into the solutions in the field. In a project, scope, time and cost are mutually influenced and restricted, and often the scope affects the time and cost. If the scope of the project is small at the start, then the time and cost it takes to complete are necessarily small. Many projects will roughly determine the project scope, time and cost at the beginning, but after a certain stage of the project, it tends to make people feel puzzled about the time to end the project, how much manpower and material resources should be invested end the project, while the whole project is like a bottomless pit, and no one knows the exact end of the project. The emergence of this situation is not uncommon, and for the top of the company, they really do not want to see it, the reason of which is that the scope of the project is not controlled and managed well. Therefore, scope management is very important in the project. 3.2Methods of control scopeFirst of all, the project managers must understand some scientific process of project scope management, which should include the following processes: start up, scope planning, scope definition, scope verification and scope change control.Secondly, the project scope is generally not the same in the process of the project, and there are always technical details not taken into account before the real implementation, especially for the inexperienced projects. The project scope specified before the start of the project needs to be refined and supplemented with the process of business analysis and system analysis. And the most important thing is communication, that is, to keep the timely communication with the stakeholders, no matter when the scope is confirmed and updated. After all, the project manager is the service provider, and nothing is impossible to negotiate.Finally, the technology and tools（WBS & Decomposition）in the project scope shall be reasonably and scientifically applied in a project, while a successful project must be managed in a scientific way.4. Advantages of scenarios in project managementFirst of all, scenarios enables planners to identify potential problems that can be solved in project planning, so as to achieve the successful and effective results.Secondly, scenarios simulation can not only reproduce the management process and scene of engineering projects, but also let managers solve practical problems and understand and grasp the implementation process of engineering management. It can also reduce the risk in project management, while each project is risky, and only by considering the risk ahead of time and find out the solutions, will the project be more smoothly.