Section 1: Identifying the use cases of the system based on the narrative above, and giving a brief description for each of the use cases.
(Please note that the narrative does not cover all the aspects of the QBS business system. You are only required to identify the use cases covered by the given information.)
From Section 2, you focus on only one use case. Although you can choose any use case identified in Section 1, we recommend that you take the use case, "Buy Items", for the following sections.
Section 2: Developing a use case diagram.
Section 3: Developing activity diagrams. (Please note that for the use case, "Buy Items", there are two scenarios, namely, "General public customer buys items" and "Contractor customer buys items". You should develop an activity diagram for each of the scenarios.)
Section 4: Providing fully developed use case descriptions for the use case, (that is, a fully developed use case description for each of the scenarios).
Section 5: Developing domain model class diagrams, (a diagram for each of the scenarios).
Section 6: Developing system sequence diagrams, (a diagram for each of the scenarios).