1. Introduction
Introduction to the use-case model.

2. Survey Description
Survey Description of the use-case model.

3. The Use-Case-Model Hierarchy
This section presents the use-case packages hierarchically, explains the dependencies among them, and shows the content of each package recursively. If the model has several levels of packages, those at the top-level are presented first. The packages within these are presented next, and so on, all the way down to the packages at the bottom of the hierarchy. For each package include:

• Its unique Name; which may require showing its relation to any parent packages.
• A Brief Description explaining the package's function and role in the system. The description must be understandable to any developer who wants to use the package.
• A list of the use cases owned by the package, including the name and brief description of each use case.
• A list of actors owned by the package, including the name and brief description of each actor.
• A list of relationships owned by the package, including the name and brief description of each relationship.
• A list of the packages directly owned by the package, with each package presented in the same hierarchical manner as above.

4. Diagrams of the Use-Case Model
Diagrams, primarily use-case diagrams, of the entire use-case model are included here.