This sequence diagram illustrates the steps a user follows to sign up, log in, add credit, and place an order in a system. Each stage includes alternative flows, such as handling invalid inputs and insufficient balance, with messages guiding the user through errors and successful actions. Ideal for software developers and system designers, this diagram provides a clear view of user interaction flow and error handling in a transactional system. Created with EdrawMax, it’s adaptable to various user authentication and order processing systems.
