A group of system administrators must keep track of computers assigned to computer users in the community they support. A planned Computer Assignment System (CAS) will keep track of computers, computer users, and assignments. Developers in the same enterprise will implement CAS. The major stakeholders are System Administrators, the Computer Users, the CAS Developers, Accountants, and the Managers of the development group and the system administration group. CAS has the following business goals:

Three people must develop CAS in three months or less. CAS must require no more than one person-week per year for maintenance.

CAS must maintain the location, components, operational status, purchase date, and assignment of every computer in the organization.

CAS must maintain the name, location, and title of every computer user in the organization.

CAS users must take no more than an average of one minute per transaction to maintain this information.

Managers need CAS to meet its business requirements. Managers will not use CAS directly.

The Computer Users need CAS to maintain accurate data so that they will not be bothered with straightening out confusions.

The Developers need CAS to be easy to build and maintain. Developers need to build but not use CAS.

The Accountants need reports about computers, their costs, and their purchase dates so that they can compute capital expenditures, depreciation, and so forth.

The System Administrators need CAS to meet its business requirements. They also need reports listing all information CAS maintains about computers, computer users, and assignments, sorted by computer or by computer user. In addition, they need CAS to support queries about individual computers or individual computer users.

7. Write three scenarios describing interactions between individuals and the Computer Assignment System.

8. List and write brief descriptions of the actors involved in the Computer Assignment System.

9. Draw a use case diagram for the Computer Assignment System.