Creating a RACI matrix requires several steps. First, you need to identify the tasks or activities that need to be completed for the project which can be done with a work breakdown structure, Gantt chart, or list of deliverables. Additionally, you should identify the team members or stakeholders involved in the project, labeling them by name, role, or function. Afterwards, assign a RACI code to each task and team member combination using a spreadsheet, template, or software tool. It's important to note that each task should have one accountable person and each team member should have at least one responsible or accountable task. Finally, review and validate the matrix with your group and other stakeholders through a meeting, email, or document sharing platform to ensure everyone agrees and understands their roles and responsibilities.