Project management tools and techniques are the methods and instruments used to perform the project management processes and apply the project management knowledge areas. These include a project charter that authorizes and defines the scope, objectives, and stakeholders of your project. Additionally, there is a work breakdown structure (WBS) that hierarchically decomposes the project scope. A Gantt chart is a graphical representation of the project schedule that shows start and end dates, dependencies, and progress. Critical path method (CPM) is a technique that identifies the longest sequence of activities that determines the minimum duration of your project. Earned value management (EVM) measures performance and progress by comparing planned and actual scope, time, and cost. A quality management plan describes how you will ensure and control quality of deliverables and processes. Furthermore, a risk register records identified risks, their causes, impacts, probabilities, responses, and status. Stakeholder analysis identifies and assesses power, interest, influence, and expectations of your project stakeholders. Communication plan specifies information needs, channels, frequency, and methods of communication for your project. Lastly, lessons learned captures knowledge, experience, and feedback gained from your project.