SSDs are used to describe the behavior of a system at several levels of detail. Often, an SSD is used to model the detailed interaction of a collection of objects that collaborate to accomplish a particular goal. At a higher level of detail, an SSD can be used to identify the flow of information into and out of the system. In this assignment, the interaction between actors and a system is modeled, with the information into and out of the system explicitly described on the diagram.

Based on "The Spring Breaks 'R' Us Travel Services" (SBRU) case study given at the end of Chapter 5 in the course text:

By Day 4, individually post to the group discussion board a suggested list and brief description of use cases you think are required to appropriately model the project. You may begin by referring to the list of use cases developed in Unit 3. Justify your suggestions.