Having a clear process and guidelines can help you overcome creative differences by providing a structure and a direction for your team. A process can help you define the scope, goals, and deliverables of the project, as well as the roles, responsibilities, and expectations of each team member. A process can also help you break down the project into manageable stages, such as research, ideation, prototyping, testing, and iteration. Guidelines can help you establish the standards, principles, and best practices for your design, such as branding, usability, or accessibility. Guidelines can also help you evaluate and compare your design options objectively and consistently.