The Use Case Diagram - Coursework Example

?Within the context of T & G, the numerous functions to be performed by the employees shall be allocated based on the availability of donations.  Themain actors within the system shall include the donors, activity coordinators, employees, the database system and the storage facility. The activity coordinators shall be linking with the human actors within the use case diagram. The people coordinating the company activities shall become central to the entire operation of the company. This diagram shall present a breakdown of the various activities involved in the entire operation. The use case diagram shall indicate the activities and duties carried out by different individuals involved in the operations of the company. All the actors presented within the use case diagram shall have functions associated with them, and linking them to the rest of the actors within the use case diagram. The class diagram on the other hand shows the different levels of all the actors involved within the framework of the use case diagram. The use case diagram presents a list of all actors involved in the operations of the company, while the class diagram classifies the different users involved. The use case diagram presents the various functions performed by different actors within the diagram. Following the identification of these functions, the class diagram shall present a detailed explanation of the categories present within the class diagram. The members present within the class diagram shall have class level attached to their identity to classify the categories dividing the members. The use case diagram presents the recipients of the donations as the last actors within the context of the use case. The interaction of these actors shall only occur between the members presenting them with the donation. Within the class diagram, however, the individuals presenting the donations and the activity coordinators shall form part of the donor-recipient association. These individuals shall function to facilitate the association between the two classes of end users. The activities undertaken by the company seek to link the donors to the recipients of the donations. The association of these end users remains fundamental to the successful implementation of the company objectives. Since majority of the functions seek to focus on the donors, the central actors in the use case diagram form the association of the donor and the recipient. The associations of the donor and recipient shall be presented as binary association, facilitated through other people not benefiting from the association. Donors shall form part of the public class with the name of donors forming the next class of private level. Classified information contained in the class diagram shall include but not limited to the donations offered by the donors onto the organisations. This class would be classified as the protected class by the system enabling the storage of information contained in this class for future reference. Retrieving of particulars regarding the donations offered by each donor remains the function of few individuals, with the necessary authority to perform these functions. The donors should be able to check the information regarding their previous donations to the organisation. This information remains crucial for the donors who need to trace their donations before offering others. Following the donations, the donor could be able to retrieve information regarding the loyalty point earned from the donations made. Accessing this information could also present the opportunity for donor to present their pledges. The use case diagram should present description of the actors who should be making follow-ups on the status of pledges. This would ensure that the status of the pledges made by donors remains updated, as the information could assist the coordinators in allocating donations to needy recipients. Such information would also play a significant role in ensuring the donations arrive at the required destinations on timely basis. A major disadvantage of the use case diagram remains the lack of presentation of non-interaction requirements within the system under discussion. Within the use case diagram, functions like indicating the number of donations cannot be presented. This information, though crucial in awarding loyalty points, can only be retrieved from the class diagram. The class diagram, therefore, appears to present the majority of the essential information required for the functioning of the entire system. The diagram would essentially present the organisers of the operation with the necessary information required to maintain improved donor information. The use case diagram fails to present analytical information crucial for the analysis of the processes involved in the operations of T & G. According to Gemino & parker (2009), another shortcoming of the use case diagram remains the inability to clearly define the user interface dependency within the system. The class diagram on the other hand presents a clear determination of the prevalent dependency levels within the operating system. This makes users applying the class diagram to possess better and improved access to analytical information regarding the operations of the company.  The classes within the class diagram present the objects and interactions in the objects. The classes present specified functions of the various actors identified in the use case diagram. The identification of the function serves to help improve on the operations as duties of different actors become clearly defined through the different classes identified. Dependability of different classes upon each other significantly improves the capability of administrators to distribute the donations received. Class diagram can be termed as a detailed and improved breakdown of the information contained within a use case diagram. While the use case diagram might appear cluttered with activities, the class diagrams distribute the activities and clearly define the different roles played by the various actors within the use case diagram. The scope of use case diagrams remains limited to the operational elements of the company, while the class diagram includes relationships and interactions between the people involved within the operations. Class diagrams present detailed information regarding organisational structures, and the functions essential in ensuring proper functioning of companies. Through defining the duties of individuals, class diagrams offer assistance to administrators in allocating duties among carrying out other activities. Reference Gemino, A., and Parker, D., 2009, "Use case diagrams in support of use case modelling:             Deriving understanding from the picture", Journal of Database Management, 20(1), 1-24 Read More