Roadmaps are the result of extensive research, thought, and deliberation. It comes down to developing plans, selecting features and enhancements based on a variety of criteria once you've established strategy and goals. The product has a longer time horizon and a larger customer base, thus it will necessarily have more maintenance difficulties, such as ensuring that the product runs smoothly or the product is moving forward according to plan. In order to make it more organized, the concept of layers and sublayers has been introduced.
in this example, the main layer projects is categorized into the sublayers New Revenue, Customer Retention, Sustainability, and Process Optimization.