![]() Here is how the use case would look when using a formal use case format. You can clarify the use case further by refining the use case into a formal use case or informal use case format ( free template). The user may already have an account with the company with billing and shipping information. The system will also provide the user with an estimated delivery date for the order, which will include all selected items. The system will respond with confirmation of the order and a tracking number that the user can use to check on order status in the future. ![]() The user will provide payment and shipping information. Use Case Description: After the user has selected items to purchase and then order the items. This quick use case definition allows for agile development of use cases. The next step is to define the use case at a low level of detail. The first step in defining a use case is to define the name, using the verb-noun naming convention. This use case example shows how to describe the steps that demonstrate all interactions with the system. The system also interacts with two external systems. The user interacts with the main system that we are describing. Here’s an example of a use case that has some system complexity.
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