Understanding client requirements: The first step would be to understand the client's requirements, including the purpose of the poster/banner, the target audience, and any specific design guidelines or branding requirements.

Concept development: Based on the client's requirements, I would develop multiple concept designs to present to the client for feedback and selection.

Design refinement: After selecting a design concept, I would refine the design based on the client's feedback and input, including adjustments to color, typography, graphics, and layout.

Final design delivery: Once the design is finalized, I would deliver the final design files in the appropriate file format(s), such as high-resolution PDF, PNG, or JPEG, ready for printing or digital display.

Communication and collaboration: Throughout the process, I would maintain open communication with the client to ensure their satisfaction with the design and progress of the project.

Revisions: Depending on the project requirements, I would be open to providing revisions to the design until the client is completely satisfied with the final product.