Product Delivery App is a software application that enables users to order products and have them delivered to their location. The use case diagram lists eight essential features and functionalities of the app, including creating delivery requests, approving delivery requests, assigning employees, processing payments, completing deliveriesupdating requests, reviewing system reports, and logging in.

The Create Delivery Request use case allows users to place an order for a product and have it delivered to their location. The system sends a confirmation email to the user, including the order details and delivery schedule.

The Approve Delivery Request use case allows administrators to approve delivery requests made by users. This ensures that the system can manage new delivery requests efficiently and securely.

The Process Payment use case allows users to pay for their orders online. The system sends a confirmation email to the user and updates the payment status. This use case ensures that users can pay for their orders conveniently and securely.

The Complete Delivery use case allows employees to complete the delivery of the products to the user's location. This ensures that the products are delivered to the user's location efficiently and securely.

Benefits of creating this diagram

Creating a use case diagram offers several benefits in the development process of any software system. Firstly, it provides a clear and concise overview of the system's features and functionalities. The diagram helps to identify the different use cases involved in the system, their relationships, and dependencies. This information is useful in designing the system's architecture, developing the user interface, and identifying potential issues early in the development process.

Secondly, the use case diagram can be used as a communication tool between the development team and stakeholders. The diagram provides a common vocabulary for discussing the system's requirements and functionality. Stakeholders can easily understand the system's features and functionalities, which helps to ensure that the system meets their needs. Additionally, the use case diagram can be used to manage user expectations by setting realistic goals for the system's development.