There is no one-size-fits-all answer on how to write a great architecture proposal, as the content and format of a great software architecture document will vary depending on the specific project and stakeholders involved. However, there are some general tips that can help you create a well-organized and informative document that will serve as a valuable resource for everyone involved in the project.
Before you begin writing, take some time to gather information about the project, including the goals and objectives, the system requirements, the existing architecture (if any), and the stakeholders involved. This will help you determine the scope of the document and the level of detail required. You should also create a outline of the topics you plan to cover.
Build your high level structure
Once you have this information, you can start writing the document. Begin with a high-level overview of the project, including the goals, objectives, and requirements. Then, provide a more detailed description of the proposed architecture, including any new components or features. Be sure to include diagrams or other visualizations to help illustrate the concepts.
Risks & Challenges
Finally, don't forget to include a section on the risks and challenges associated with the proposed architecture. This will help everyone involved in the project understand the potential risks and be better prepared to address them.
By following these tips, you can create a software architecture document that will be a valuable resource for everyone involved in the project.